Photography test chart, information processing apparatus, information processing method, and program

Abstract

An imaging test chart (100) includes an iris pattern IRP for evaluating at least one among an imaging environment and imaging settings.

Description

Photographing test chart, information processing device, information processing method, and recording medium

[0001] The present disclosure relates to a test chart for photography, an information processing device, an information processing method, and a recording medium.

[0002] Various photographic test charts have been proposed for use in obtaining good images of subjects photographed with a photographing device such as a camera. For example, Patent Document 1 describes the use of a photographic environment characteristic evaluation chart for measuring the characteristics of incident light from a light source that is directed onto a subject to be evaluated.

[0003] Japanese Patent Application Laid-Open No. 2021-043722

[0004] The present disclosure aims to improve upon the techniques described in the prior art documents mentioned above.

[0005] According to one aspect of the present invention, there is provided a photography test chart including an iris pattern for evaluating at least one of a photography environment and a photography setting.

[0006] According to one aspect of the present invention, there is provided an information processing device that creates a chart image including an iris pattern for evaluating at least one of a shooting environment and a shooting setting.

[0007] According to one aspect of the present invention, there is provided an information processing method in which one or more computers create a chart image including an iris pattern for evaluating at least one of a shooting environment and a shooting setting.

[0008] According to one aspect of the present invention, there is provided a recording medium having recorded thereon a program for causing one or more computers to execute the process of creating a chart image including an iris pattern for evaluating at least one of a shooting environment and a shooting setting.

[0009] According to one aspect of the present invention, there is provided an information processing device comprising: a chart image acquisition means for acquiring a chart image including an iris pattern for evaluating at least one of a shooting environment and a shooting setting; and a display control means for displaying the chart image on a display means.

[0010] According to one aspect of the present invention, there is provided an information processing method in which one or more computers acquire a chart image including an iris pattern for evaluating at least one of a shooting environment and a shooting setting, and display the chart image on a display means.

[0011] According to one aspect of the present invention, there is provided a recording medium having recorded thereon a program for causing one or more computers to acquire a chart image including an iris pattern for evaluating at least one of a shooting environment and a shooting setting, and display the chart image on a display means.

[0012] According to one aspect of the present invention, there is provided an information processing device comprising: a photographed image acquisition means for acquiring a chart photographed image, which is an image obtained by photographing a photographing test chart or a chart image including an iris pattern for evaluating at least one of a photographing environment and a photographing setting; a registration data acquisition means for acquiring registration data including the iris pattern of the photographing test chart or the chart image; a detection means for detecting an iris pattern from the acquired chart photographed image; a comparison means for comparing the detected iris pattern with an iris pattern included in the registration data; a score acquisition means for determining an evaluation score for evaluating at least one of the iris pattern and the chart photographed image based on a result of at least one of the detection and the comparison; and an output control means for causing an output means to output a value based on the evaluation score.

[0013] According to one aspect of the present invention, there is provided an information processing method in which one or more computers acquire a chart photographed image, which is an image obtained by photographing a photography test chart or chart image including an iris pattern for evaluating at least one of a photography environment and a photography setting, acquire registration data including the iris pattern of the photography test chart or chart image, detect an iris pattern from the acquired chart photographed image, compare the detected iris pattern with an iris pattern included in the registration data, determine an evaluation score for evaluating at least one of the iris pattern and the chart image based on at least one of the results of the detection and the comparison, and output the evaluation score to an output means.

[0014] According to one aspect of the present invention, there is provided a recording medium having recorded thereon a program for causing one or more computers to execute the following: acquire a chart photographed image, which is an image obtained by photographing a photography test chart or chart image including an iris pattern for evaluating at least one of a photography environment and a photography setting; acquire registration data including the iris pattern of the photography test chart or the chart image; detect an iris pattern from the acquired chart photographed image; compare the detected iris pattern with an iris pattern included in the registration data; determine an evaluation score for evaluating at least one of the iris pattern and the chart image based on at least one of the results of the detection and the comparison; and output the evaluation score to an output means.

[0015] 1 is a diagram illustrating an overview of a test chart for photography according to embodiment 1. FIG. 1 is a diagram illustrating an overview of an information processing device according to embodiment 1. FIG. 2 is a flowchart illustrating an overview of an information processing method according to embodiment 1. FIG. 2 is a diagram illustrating an overview of an information processing device according to embodiment 1. FIG. 3 is a flowchart illustrating an overview of an information processing method according to embodiment 1. FIG. 4 is a diagram illustrating an example of a test chart for photography according to embodiment 1. FIG. 5 is a diagram illustrating an example of a configuration of a black-eye image according to embodiment 1. FIG. 6 is a diagram illustrating an example of a configuration of an information processing system according to embodiment 1. FIG. 7 is a diagram illustrating an example of a functional configuration of a chart creation device according to embodiment 1. FIG. 8 is a diagram illustrating an example of a functional configuration of an evaluation device according to embodiment 1. FIG. 9 is a diagram illustrating an example of a physical configuration of a chart creation device according to embodiment 1. FIG. 10 is a flowchart illustrating an example of a chart creation process according to embodiment 1. FIG. 11 is a diagram illustrating an example of a rectangular pattern according to embodiment 1. FIG. 12 is a diagram illustrating an example of an iris pattern IRP according to embodiment 1. FIG. 13 is a flowchart illustrating an example of an evaluation process according to embodiment 1. FIG. 14 is a diagram illustrating a first display example of an evaluation score according to embodiment 1. FIG. 15 is a diagram illustrating a second display example of an evaluation score according to embodiment 1. FIG. 16 is a diagram illustrating an example of a configuration of an information processing system according to embodiment 2. FIG. 17 is a diagram illustrating an example of a functional configuration of a chart display device according to embodiment 2. FIG. 18 is a flowchart illustrating an example of a chart display process according to embodiment 2. FIG. 19 is a diagram illustrating an example of a specific test chart according to embodiment 3. FIG. 19 is a diagram illustrating an example of a functional configuration of an output control unit according to embodiment 5. It is a flowchart showing an example of an evaluation process according to the embodiment 1. It is a diagram showing an example of a functional configuration of an evaluation device according to the embodiment 6. It is a flowchart showing an example of an environment adjustment process according to the embodiment 6.

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In all the drawings, like components are designated by like reference numerals, and the description thereof will be omitted as appropriate.

[0017] 1 is a diagram showing an overview of a photography test chart 100 according to embodiment 1. The photography test chart 100 includes an iris pattern IRP for evaluating at least one of the photography environment and photography settings.

[0018] This photographing test chart 100 makes it possible to easily obtain an image suitable for iris authentication.

[0019] 2 is a diagram showing an overview of an information processing device M1 (corresponding to a "chart creation device" described later) according to embodiment 1. The information processing device M1 creates a chart image including an iris pattern IRP for evaluating at least one of the shooting environment and the shooting settings.

[0020] According to this information processing device M1, it is possible to easily obtain an image suitable for iris authentication.

[0021] 3 is a flowchart showing an outline of an information processing method (corresponding to a "chart creation process" to be described later) according to embodiment 1. The information processing device M1 creates a chart image including an iris pattern IRP for evaluating at least one of the shooting environment and the shooting settings.

[0022] According to this information processing method, it is possible to easily obtain an image suitable for iris authentication.

[0023] 4 is a diagram showing an overview of an information processing device M2 (corresponding to an "evaluation device" described later) according to embodiment 1. The information processing device M2 includes a captured image acquisition unit 121, a registered data acquisition unit 123, a detection unit 124, a matching unit 125, a score acquisition unit 126, and an output control unit 128.

[0024] The photographed image acquisition unit 121 acquires a photographed chart image, which is an image obtained by photographing a test chart or a chart image including an iris pattern IRP for evaluating at least one of the photographing environment and the photographing settings.

[0025] The registration data acquisition unit 123 acquires registration data including the iris pattern IRP contained in the photographing test chart or chart image.

[0026] The detection unit 124 detects the iris pattern IRP from the acquired photographed chart image.

[0027] The matching unit 125 matches the detected iris pattern with the iris pattern IRP included in the registration data.

[0028] The score acquisition unit 126 obtains an evaluation score for evaluating at least one of the iris pattern IRP and the chart photographed image based on at least one of the results of detection and matching.

[0029] The output control unit 128 causes the output unit to output a value based on the evaluation score.

[0030] According to this information processing device M2, it is possible to easily obtain an image suitable for iris authentication.

[0031] FIG. 5 is a flowchart showing an outline of an information processing method (corresponding to an "evaluation process" to be described later) according to the first embodiment.

[0032] The photographed image acquisition unit 121 acquires a photographed chart image, which is an image obtained by photographing a test chart or a chart image including an iris pattern IRP for evaluating at least one of the photographing environment and the photographing settings (step S121).

[0033] The registration data acquisition unit 123 acquires registration data including the iris pattern IRP included in the photographing test chart or chart image (step S122).

[0034] The detection unit 124 detects the iris pattern IRP from the acquired photographed chart image (step S123).

[0035] The matching unit 125 matches the detected iris pattern with the iris pattern IRP included in the registration data (step S124).

[0036] The score acquisition unit 126 obtains an evaluation score for evaluating at least one of the iris pattern IRP and the photographed chart image based on at least one of the results of detection and matching (step S125).

[0037] The output control unit 128 causes the output unit to output a value based on the evaluation score (step S126).

[0038] According to this information processing method, it is possible to easily obtain an image suitable for iris authentication.

[0039] A detailed example of the photographing test chart 100 according to the first embodiment will be described below.

[0040] (Details) In general, in iris authentication, at least one of the shooting environment and shooting settings is adjusted to obtain an iris image suitable for iris authentication. An iris image is an image that shows the iris. The shooting settings are the settings applied to the image taken for iris authentication.

[0041] However, the imaging environment characteristic evaluation chart described in Patent Document 1 is used for general imaging. Therefore, even if the imaging environment characteristic evaluation chart described in Patent Document 1 is used for imaging for iris authentication, it may be difficult to appropriately adjust at least one of the imaging environment and the imaging settings, making it difficult to obtain an image suitable for iris authentication.

[0042] In view of the above-mentioned problems, one example of the purpose of this disclosure is to provide a photographing test chart, an information processing device, an information processing method, a recording medium, and the like that solve the problem of easily obtaining an image suitable for iris authentication.

[0043] (Configuration Example of the Photography Test Chart 100 According to the First Embodiment) FIG. 6 is a diagram showing an example of the photography test chart 100 according to the first embodiment.

[0044] The photography test chart 100 is a chart for evaluating at least one of the photography environment and photography settings.

[0045] The photographing environment here is, for example, the environment in which photographing for iris authentication is performed. One example of the photographing environment is the lighting environment at the photographing location for iris authentication. This light may be various types of light, such as light coming in through a window, light shining from an electric lamp, light shining from the sun, light irradiated for photographing by a strobe, etc.

[0046] The photographing settings are settings applied to photographing for iris authentication. The photographing settings may include, for example, one or more settings related to MTF (Modulation Transfer Function), contrast, brightness value, photographing range of the photographing device, etc. The setting related to the photographing range of the photographing device is, for example, at least one of an angle indicating the photographing direction by panning or tilting, a photographing magnification by zooming, etc., when the photographing device has functions such as panning, tilting, and zooming.

[0047] The photographing test chart 100 includes a sheet 101 and ten black-eye images 102_1 to 102_10 provided on the sheet 101.

[0048] Hereinafter, the "photography test chart 100" will also be referred to as the "test chart 100." Furthermore, when there is no particular need to distinguish between the black-eye images 102_1 to 102_10, they will also be referred to as the "black-eye images 102."

[0049] The number of black-eye images 102 included in the test chart 100 is not limited to 10, but may be one or more.

[0050] The sheet 101 is a rectangular sheet, for example, about 100 to 200 mm (millimeters) wide and 100 to 300 mm long.

[0051] The sheet 101 is preferably opaque, and its material is, for example, cardboard, plastic, wood, metal, glass, or a combination of one or more of these. If the material of the sheet 101 is cardboard, plastic, wood, or the like, the sheet 101 becomes lightweight, making it easy to carry. Note that the shape, dimensions, and material of the sheet 101 are not limited to those described here and may be changed as appropriate.

[0052] Each of the black eye images 102 is an area having a pattern resembling a black eye. The black eye according to this embodiment is a black eye of a human. Note that the black eye is not limited to a human eye, and may be an animal eye.

[0053] The plurality of black-eye images 102 are provided at different positions on the sheet 101. The black-eye images 102 may be provided on the sheet 101 by any appropriate method, such as printing, attaching a printed matter, or attaching a sticker.

[0054] FIG. 7 is a diagram showing an example of the configuration of the black-eye image 102 according to the first embodiment.

[0055] The black-eye image 102 is composed of a pupil region 103 and an iris region 104. Here, the word "composed" does not mean that the black-eye image 102 may further include elements other than the pupil region 103 and the iris region 104.

[0056] The pupil region 103 is a region that resembles a pupil, that is, a region that corresponds to the pupil. The pupil region 103 according to this embodiment is a substantially circular region that is filled in black.

[0057] The iris region 104 is a region that resembles the iris, i.e., a region that corresponds to the iris. The iris region 104 according to this embodiment is an annular region that circumscribes the pupil region 103 and is concentric with the pupil region 103.

[0058] Here, the "annular region" refers to a region in the shape of a ring having a certain width, in other words, a region surrounded by concentric circles having different radii. The "annular region" refers to the shape of the annular region.

[0059] The outer diameter of the iris region 104 may be equal to the outer diameter of an actual person's iris or the average of such outer diameters. The outer diameter of the iris region 104 may be, for example, 10 to 12 millimeters. However, the outer diameter of the iris region 104 is not limited to these values ​​and may be set as appropriate.

[0060] The iris region 104 is provided with an iris pattern IRP.

[0061] The iris pattern IRP is a pattern in which brightness differs from one another in at least some of the multiple small regions 105_j obtained by dividing the iris region 104. Here, j is an integer from 1 to N, and N is an integer of 2 or more.

[0062] The multiple small regions 105_j are regions obtained by dividing the iris region 104 by one or more circles CR concentric with the pupil region 103 and one or more straight lines LN passing through the center of the pupil region 103. As a result, each of the multiple small regions 105_j has an arc shape with a certain width.

[0063] The one or more circles CR that divide the iris region 104 may divide the area between the outer edge of the pupil region 103 (i.e., the inner edge of the iris region 104) and the outer edge of the iris region 104 at equal intervals in the radial direction. Furthermore, when the iris region 104 is divided by a plurality of straight lines LN, the angles formed by adjacent straight lines LN may all be equal.

[0064] 7 shows an example in which there are three circles CR and six straight lines ln, and as a result, the iris region 104 is divided into 48 small regions 105_1 to 105_48 that are similar in shape to one another.

[0065] The shapes, sizes, etc. of the small regions 105_j described here are merely examples and may be changed as appropriate. For example, the shapes may be dissimilar to each other.

[0066] The brightness of the plurality of small regions 105_j may be, for example, two levels of black and white. Note that the brightness of the plurality of small regions 105_j may be three or more levels of gray, or may be in color.

[0067] The iris patterns IRP included in the plurality of black-eye images 102 are different from each other.

[0068] There are various different aspects of the iris pattern IRP.

[0069] For example, when the iris patterns IRP are different from one another, the resolution of the iris patterns IRP may differ. The resolution of the iris pattern IRP is an index representing the coarseness of the iris pattern IRP, and corresponds to the number of small regions 105_j obtained by dividing the iris region 104 in which the iris pattern IRP is provided. In other words, when the iris patterns IRP are different from one another, the number of small regions 105_j obtained by dividing the iris region 104 in which the iris pattern IRP is provided may differ from one another.

[0070] For example, when the iris patterns IRP are different from each other, the resolution of the iris patterns IRP may be the same. If the brightness of at least one of the small regions 105_j corresponding to the iris region 104 in which the iris patterns IRP are provided is different, these iris patterns IRP are different from each other.

[0071] (Configuration Example of Information Processing System 110 According to Embodiment 1) Fig. 8 is a diagram showing a configuration example of an information processing system 110 according to Embodiment 1. The information processing system 110 includes a chart creation device M1, a photographing device CM, and an evaluation device M2.

[0072] The chart creation device M1, the photographing device CM, and the evaluation device M2 are connected to each other so as to be able to transmit and receive information to and from each other via a network N. The network N is, for example, a wired or wireless communication network, or a combination thereof.

[0073] (Example of Functional Configuration of Chart Creation Device M1 According to First Embodiment) FIG. 9 is a diagram showing an example of the functional configuration of the chart creation device M1 according to the first embodiment.

[0074] The chart creation device M1 is an information processing device that creates a chart image including an iris pattern IRP for evaluating at least one of the shooting environment and the shooting settings.

[0075] The chart creating device M1 includes a numerical value determining section 112, an iris pattern creating section 113, a black eye creating section 114, a chart creating section 115, a chart output section 116, a chart storage section 117, and a chart printing section PRN.

[0076] The numerical value determination unit 112 determines a plurality of numerical values ​​corresponding to each of the plurality of small regions 105_j.

[0077] In more detail, for example, the numerical value determination unit 112 may determine a plurality of numerical values ​​corresponding to each of the plurality of small regions 105_j in accordance with a predetermined rule. For example, the numerical value determination unit 112 may generate a random number for each of the plurality of small regions 105_j and determine a plurality of numerical values ​​corresponding to each of the plurality of small regions 105_j based on the generated random number. The random numbers may be either true random numbers or pseudo-random numbers.

[0078] When random numbers are used, the numerical value determination unit 112 may, for example, store information in advance that associates the range of generated random numbers with numerical values, thereby determining the numerical values ​​corresponding to each of the plurality of small regions 105_j by obtaining the numerical values ​​associated with the random numbers generated for each of the plurality of small regions 105_j from the information.

[0079] The iris pattern creating unit 113 creates an iris pattern IRP in which the brightness of each of the plurality of small regions 105_j corresponds to the corresponding numerical value.

[0080] In detail, for example, the iris pattern creating unit 113 functionally includes a first creating unit 118 and a second creating unit 119 .

[0081] The first creating unit 118 creates a rectangular pattern in which a rectangular area is divided into a plurality of small rectangular areas, each of which has brightness corresponding to a plurality of numerical values.

[0082] The second creation unit 119 creates the iris pattern IRP by transforming the rectangular pattern into a ring-shaped pattern. The second creation unit 119 creates the iris pattern IRP by, for example, performing an operation on the rectangular pattern to convert a polar coordinate system into a Cartesian coordinate system.

[0083] The black-eye creating unit 114 creates a black-eye image 102 that is made up of a circular pupil region 103 that corresponds to the pupil, and an iris region 104 that circumscribes the pupil region 103 and has an iris pattern IRP provided therein.

[0084] The chart creating unit 115 creates a chart image including the created one or more black-eye images 102 .

[0085] The chart output unit 116 outputs the created chart image to at least one of the chart storage unit 117, the chart printing unit PRN, and the like.

[0086] The chart storage unit 117 is a storage unit for storing the chart image output from the chart output unit 116. The chart printing unit PRN prints the chart image output from the chart output unit 116. The chart printing unit PRN may be a printing device such as a printer.

[0087] Referring again to Figure 8, the photographing device CM is a device for photographing the test chart 100 or a chart image.

[0088] In more detail, for example, the photographing device CM may photograph the test chart 100 placed in a predetermined location. Alternatively, for example, the photographing device CM may be placed in a predetermined location and photograph a screen on which a chart image is displayed. This allows the chart image to be photographed. An example of displaying a chart image will be described later in another embodiment.

[0089] When the photographing device CM photographs the test chart 100 or the chart image, it generates a photographed chart image, which is an image obtained by photographing the test chart 100 or the chart image. The photographed chart image includes the test chart 100 or the chart image. Such a photographing device CM is, for example, a camera.

[0090] (Example of Functional Configuration of Evaluation Device M2 According to First Embodiment) FIG. 10 is a diagram showing an example of the functional configuration of the evaluation device M2 according to the first embodiment.

[0091] The evaluation device M2 is an information processing device for evaluating at least one of the iris pattern and the chart photographed image. Based on this evaluation, the user can evaluate at least one of the photographing environment and the photographing settings.

[0092] The evaluation device M2 includes a captured image acquisition unit 121, a registered data storage unit 122, a registered data acquisition unit 123, a detection unit 124, a matching unit 125, a score acquisition unit 126, an output unit 127, and an output control unit 128.

[0093] The photographed image acquisition unit 121 acquires a photographed chart image from the photographing device CM.

[0094] The registration data storage unit 122 is a storage unit for storing registration data in advance. The registration data includes the iris pattern IRP included in the test chart 100 or chart image photographed by the photographing device CM.

[0095] The registration data acquisition unit 123 acquires the registration data. In detail, for example, the registration data acquisition unit 123 acquires the registration data from the registration data storage unit 122. Note that the registration data acquisition unit 123 is not limited to acquiring the registration data from the registration data storage unit 122, and may acquire the registration data from another device via the network N, for example.

[0096] The detection unit 124 detects the iris pattern IRP from the chart photographed image acquired by the photographed image acquisition unit 121 .

[0097] The detection unit 124 may use a common technique such as pattern matching, a machine learning model, etc. The method by which the detection unit 124 detects the iris pattern IRP is preferably the same as the method by which the iris is detected from an image of a subject in iris authentication.

[0098] For example, when a machine learning model is used, the detection unit 124 inputs the photographed image of the chart into an iris detection model that has been trained to detect irises from photographed images of a target, and acquires an image including an iris pattern IRP. In training the iris detection model, for example, supervised learning may be performed using training data in which correct labels indicating the positions of the irises are attached to photographed images of the target.

[0099] The matching unit 125 matches the iris pattern IRP detected by the detection unit 124 with the iris pattern IRP included in the registration data.

[0100] In more detail, for example, the matching unit 125 determines the similarity between the iris pattern IRP detected by the detection unit 124 and the iris pattern IRP included in the registration data. For example, if the similarity is equal to or greater than a threshold, the matching unit 125 determines that the iris pattern IRP detected by the detection unit 124 matches the iris pattern IRP included in the registration data and that the matching was successful. Alternatively, for example, if the similarity is less than the threshold, the matching unit 125 determines that the iris pattern IRP detected by the detection unit 124 does not match the iris pattern IRP included in the registration data and that the matching was unsuccessful.

[0101] The method for calculating the similarity may use common techniques such as pattern matching, machine learning models, etc. The method for calculating the similarity is preferably the same as the method for calculating the similarity used in iris authentication using an image of a target.

[0102] For example, when a machine learning model is used, the matching unit 125 may input an image including the iris pattern IRP detected by the detection unit 124 to a feature extraction model that has been trained to extract feature amounts from an iris image detected using an iris detection model. This allows the matching unit 125 to acquire the feature amounts of the iris pattern IRP detected by the detection unit 124.

[0103] The matching unit 125 may input an image including the iris pattern IRP included in the enrollment data to the feature extraction model, thereby enabling the matching unit 125 to acquire the feature of the iris pattern IRP included in the enrollment data.

[0104] The matching unit 125 then calculates the similarity between the two acquired feature amounts, thereby determining the similarity between the iris pattern IRP detected by the detection unit 124 and the iris pattern IRP included in the enrollment data.

[0105] The score acquisition unit 126 obtains an evaluation score based on at least one of the results of the detection performed by the detection unit 124 and the matching performed by the matching unit 125. The evaluation score is an index such as a value for evaluating at least one of the iris pattern IRP and the chart photographed image.

[0106] The evaluation score includes, for example, one or more of: (1) an evaluation score for each iris pattern IRP included in the chart photographed image; and (2) an evaluation score for the chart photographed image.

[0107] The evaluation score (1) includes, for example, the similarity to the iris pattern IRP included in the registered data, the reliability indicating the degree to which the similarity is reliable, the detection time required to detect the iris pattern IRP from the chart photographed image, a histogram, etc.

[0108] The evaluation score (2) may include, for example, the sum and average of the similarities calculated for all iris patterns IRP included in the chart photographed image, the sum and average of the reliability, and the sum and average of the detection time.

[0109] The output unit 127 outputs a value based on the evaluation score. The output unit 127 includes, for example, a display unit 130 and a transmission unit 131.

[0110] The display unit 130 displays a value based on the evaluation score. The display unit 130 according to this embodiment displays the evaluation score.

[0111] The transmitting unit 131 transmits a value based on the evaluation score to another device or the like via the network N.

[0112] The output control unit 128 causes the output unit 127 to output a value based on the evaluation score. The output control unit 128 includes a display control unit 132 that causes the display unit 130 to display the value based on the evaluation score, and a transmission control unit 133 that causes the transmission unit 131 to transmit the value based on the evaluation score.

[0113] The display control unit 132 causes the display unit 130 to display the evaluation score obtained by the score acquisition unit 126 in association with at least one of the iris pattern IRP and the chart photographed image to which the evaluation score relates.

[0114] In detail, for example, the display control unit 132 includes a position identification unit 134 and an association unit 135 .

[0115] Based on the result of the matching performed by the matching unit 125, the position specifying unit 134 specifies the position of the iris pattern IRP included in the registration data in the chart photographed image.

[0116] Based on the identified position, the associating unit 135 associates the iris pattern IRP or the photographed chart image with the evaluation score related thereto and displays them on the display unit 130. That is, for example, for the evaluation score (1), the associating unit 135 associates the evaluation score with the corresponding iris pattern IRP and displays them on the display unit 130. For example, for the evaluation score (2), the associating unit 135 associates the evaluation score with the photographed chart image and displays them on the display unit 130.

[0117] Up to this point, the functional configuration example of the information processing system 110 according to the first embodiment has been mainly described. From here, a physical configuration example of the information processing system 110 according to the first embodiment will be described.

[0118] 11 is a diagram showing an example of the physical configuration of the chart creation device M1 according to embodiment 1. The chart creation device M1 physically includes, for example, a bus 1010, a processor 1020, a memory 1030, a storage device 1040, a communication interface 1050, an input interface 1060, and an output interface 1070.

[0119] The processor 1020 is implemented as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit).

[0120] The memory 1030 is a main storage device realized by a RAM (Random Access Memory) or the like.

[0121] The storage device 1040 is an auxiliary storage device realized by a hard disk drive (HDD), a solid state drive (SSD), a memory card, a read-only memory (ROM), or the like. The storage device 1040 stores program modules for realizing the functions of the chart creation device M1. The processor 1020 loads each of these program modules into the memory 1030 and executes them to realize the function corresponding to that program module.

[0122] The communication interface 1050 is an interface for connecting the chart creation device M1 to the network N.

[0123] The input interface 1060 is an interface for the user to input information, and is configured from, for example, a touch panel, a keyboard, a mouse, and the like.

[0124] The output interface 1070 is an interface for presenting information to the user, and is configured from a liquid crystal panel, an organic EL (Electro-Luminescence) panel, and the like.

[0125] (Example of Physical Configuration of Evaluation Device M2) The evaluation device M2 may be physically configured in the same manner as the chart creation device M1 (see FIG. 11). However, the storage device 1040 of the evaluation device M2 stores program modules for realizing the functions of the evaluation device M2. The communication interface 1050 of the evaluation device M2 is an interface for connecting the evaluation device M2 to the network N.

[0126] The chart creation device M1 and the evaluation device M2 may be physically configured as one device, or the functions provided therein may be physically divided among a plurality of devices.

[0127] So far, an example of the configuration of the information processing system 110 according to the first embodiment has been described. Next, an example of the operation of the information processing system 110 according to the first embodiment will be described.

[0128] (Operation of Information Processing System 110 According to First Embodiment) The information processing system 110 executes information processing including a chart creation process executed by the chart creation device M1 and an evaluation process executed by the evaluation device M2.

[0129] (Example of Chart Creation Processing According to First Embodiment) FIG. 12 is a flowchart showing an example of chart creation processing according to the first embodiment.

[0130] The chart creation process is a process for creating a chart image including iris patterns IRP for evaluating at least one of the shooting environment and the shooting settings. The chart creation process is started, for example, in response to a user instruction. Before the chart creation process is started, the number and resolution of iris patterns IRP to be included in the chart image to be created are set, for example, by user input. In the following example, the number of iris patterns IRP is 10, and the resolution of each iris pattern IRP is the same.

[0131] The number of iris patterns IRP included in the chart image is not limited to 10, as is the number of black eye images 102 included in the test chart 100, and may be one or more.

[0132] The numerical value determination unit 112 determines a plurality of numerical values ​​corresponding to each of the plurality of small regions 105_j included in the iris pattern IRP (step S101).

[0133] In more detail, for example, the numerical value determination unit 112 generates a random number greater than 0 and equal to or less than 1, and the iris pattern IRP is a monochrome two-tone pattern.

[0134] In this case, for example, the numerical value determination unit 112 may determine "0" or "1" as the numerical value corresponding to the small region 105_j based on the random number generated for the small region 105_j. Specifically, if the random number is 0.5 or less, the numerical value determination unit 112 may determine "0" as the numerical value corresponding to the small region 105_j. Furthermore, if the random number is greater than 0.5, the numerical value determination unit 112 may determine "1" as the numerical value corresponding to the small region 105_j.

[0135] The iris pattern creating unit 113 creates an iris pattern IRP in which the brightness of each of the plurality of small regions 105_j corresponds to the corresponding numerical value (step S102).

[0136] In more detail, for example, the first creating unit 118 creates a rectangular pattern in which a rectangular area is divided into a plurality of small rectangular areas, each of which has brightness corresponding to a plurality of numerical values ​​(step S1021).

[0137] 13 is a diagram showing an example of a rectangular pattern according to the first embodiment. The rectangular pattern is an example configured from a plurality of small rectangular regions obtained by dividing a rectangular region having a width W and a height H into a grid pattern. The first creation unit 118 fills each of the plurality of small rectangular regions with a brightness corresponding to the numerical value determined in step S101. The number of the plurality of small rectangular regions is the same as the number of small regions 105_j that constitute the iris pattern IRP.

[0138] For example, assume that the number "0" corresponds to white and the number "1" corresponds to black. The first creation unit 118 paints the small rectangular areas in a predetermined order with white or black according to the number determined in step S101. By performing this process for all small rectangular areas, a rectangular pattern is created.

[0139] The second creating unit 119 creates an iris pattern IRP by transforming the rectangular pattern into a ring-shaped pattern (step S1022).

[0140] Fig. 14 is a diagram showing an example of an iris pattern IRP according to embodiment 1. The second creation unit 119 creates the iris pattern IRP shown in Fig. 14 by performing a calculation to convert the polar coordinate system into a Cartesian coordinate system on the rectangular pattern shown in Fig. 13. The figure shows an example in which an iris pattern IRP is created, with an inner radius Rp and an outer radius Ri centered at (Xc, Yc).

[0141] The black-eye creating unit 114 creates the black-eye image 102 (step S103).

[0142] In more detail, for example, the black-eye creating unit 114 creates the black-eye image 102 by using the iris pattern IRP created in step S1022 as the iris region 104 and painting the pupil region 103 therein in black.

[0143] The iris creating unit 114 determines whether a predetermined number of iris images 102 have been created (step S104).

[0144] If it is determined that the predetermined number of black-eye images 102 have not been created (step S104; No), steps S101 to S103 are executed again. The predetermined number here means the number of iris patterns IRP included in the chart image, which is 10 in this embodiment as described above. Therefore, steps S101 to S103 are repeatedly executed until 10 black-eye images 102 have been created. As a result, 10 black-eye images 102 are created.

[0145] Furthermore, the iris pattern IRP is created based on the numerical value determined in step S101. Therefore, there is a high possibility that the iris patterns IRP created in the repeatedly executed step S102 will be different from each other. In particular, when random numbers are generated and numerical values ​​are determined in step S101, there is an extremely high possibility that the iris patterns IRP will be different from each other. Therefore, it is possible to create a plurality of black-eye images 102 including different iris patterns IRP.

[0146] If it is determined that a predetermined number of black-eye images 102 have been created (step S104; Yes), the chart creation unit 115 creates a chart image including the black-eye images 102 created in step S104 (step S105).

[0147] In detail, for example, the chart creation unit 115 creates a chart image by arranging each of the ten black-eye images 102 created in step S104 at a predetermined position within the chart image. The ten black-eye images 102 are arranged at positions different from each other.

[0148] The chart output unit 116 outputs the chart image created in step S105 (step S106), and the chart creation process ends.

[0149] In more detail, for example, as described above, the chart output unit 116 outputs to at least one of the chart storage unit 117, the chart printing unit PRN, etc. When the chart is output to the chart printing unit PRN, the chart printing unit PRN prints the chart image on a medium such as the sheet 101, paper, or sticker. By attaching the paper or sticker on which the chart image is printed to the sheet 101, the test chart 100 can be created.

[0150] (Example of Evaluation Processing According to First Embodiment) FIG. 15 is a flowchart showing an example of evaluation processing according to the first embodiment.

[0151] The evaluation process is a process for evaluating at least one of the iris pattern IRP and the chart photographed image including the iris pattern IRP.

[0152] Before starting the evaluation process, for example, the user places one or more test charts 100 or chart images in a predetermined position. In this embodiment, a board on which multiple test charts 100 are mounted, arranged vertically and horizontally, is placed in a predetermined position. Then, the photographing device CM, in response to a user instruction, photographs the multiple test charts 100 and generates multiple photographed chart images each including the multiple test charts 100. The evaluation device M2 then starts the evaluation process.

[0153] The photographed image acquisition unit 121 acquires the chart photographed image generated by the photographing device CM from the photographing device CM (step S121).

[0154] The registration data acquisition unit 123 acquires the registration data from the registration data storage unit 122 (step S122).

[0155] The detection unit 124 detects the iris pattern IRP from the chart photographed image acquired in step S121 (step S123).

[0156] At this time, the detection unit 124 may measure the detection time required to detect the iris pattern IRP from the chart photographed image.

[0157] The matching unit 125 matches the iris pattern IRP detected by the detection unit 124 with the iris pattern IRP included in the registration data (step S124).

[0158] In more detail, for example, the matching unit 125 matches each of the iris patterns IRP included in the registration data with the iris pattern IRP in the chart photographed image.

[0159] For example, if the matching is successful, the matching unit 125 associates the successfully matched registered data with the iris pattern IRP in the photographed chart image. At this time, the matching unit 125 may, for example, associate the similarity between the successfully matched registered data and the iris pattern IRP in the photographed chart image with the iris pattern IRP and store it. The matching unit 125 may also associate the reliability of the calculated similarity with the successfully matched iris pattern IRP and store it.

[0160] Furthermore, for example, if the iris pattern IRP in the chart photographed image is unclear, the iris pattern IRP may not be successfully matched with any of the iris patterns IRP included in the registered data. In this case, for example, the matching unit 125 may associate the iris pattern IRP included in the registered data with information indicating that the corresponding iris pattern IRP in the chart photographed image is unknown and store the information.

[0161] The score acquisition unit 126 calculates an evaluation score based on the results of at least one of the detection performed by the detection unit 124 (i.e., the detection process of step S123) and the matching performed by the matching unit 125 (i.e., the matching process of step S124) (step S125).

[0162] As described above, the evaluation score includes, for example, (1) the similarity and reliability calculated in step S124 for each iris pattern IRP detected by the detection unit 124, and the detection time measured in step S123. Furthermore, for example, the evaluation score includes (2) the total and average values ​​of the similarity, reliability, and detection time for all iris patterns IRP included in the chart photographed image (i.e., all iris patterns IRP). The evaluation score may include at least one of the examples given here, or may include scores other than the examples given here.

[0163] The output unit 127 outputs a value based on the evaluation score calculated in step S125 (step S126).

[0164] In step S126 according to this embodiment, the display control unit 132 associates the evaluation score obtained in step S125 with at least one of the iris pattern IRP and the chart photographed image to which the evaluation score is related, and displays them on the display unit 130.

[0165] In detail, for example, the position specifying unit 134 specifies the position of the corresponding iris pattern IRP in the chart photographed image for each iris pattern IRP included in the registration data based on the result of the matching process in step S124 (step S1261).

[0166] For example, if matching is successful for an iris pattern IRP included in the enrollment data, the iris pattern IRP corresponds to the iris pattern IRP in the chart photographed image with which matching was successful. Therefore, for such iris pattern IRP included in the enrollment data, the position identifying unit 134 can identify the position of the corresponding iris pattern IRP in the chart photographed image.

[0167] Furthermore, for example, if matching fails for an iris pattern IRP included in the registration data, it is unclear which iris pattern IRP in the chart photographed image corresponds to that iris pattern IRP. Therefore, for such iris pattern IRP included in the registration data, it is not necessary to identify the position in the chart photographed image.

[0168] The associating unit 135 displays an image in which the evaluation score is associated with the iris pattern IRP or the photographed chart image on the display unit 130 based on the position identified in step S1261 (step S1262), and ends the evaluation process.

[0169] In detail, for example, for the evaluation score (1), the associating unit 135 causes the display unit 130 to display an image in which the evaluation score is associated with the iris pattern IRP. For the evaluation score (2), the associating unit 135 causes the display unit 130 to display an image in which the evaluation score is associated with the chart photographed image.

[0170] The association may be achieved, for example, by superimposing the image, displaying using a speech bubble, etc. That is, for example, the evaluation score may be associated by being superimposed on the image of the iris pattern IRP or the image of the chart photographed image. Also, for example, the evaluation score may be associated by being displayed in a speech bubble showing the image of the iris pattern IRP or the image of the chart photographed image.

[0171] 16 is a diagram showing a first display example of an evaluation score according to embodiment 1. The drawing shows a display example in which an image of an iris pattern IRP is associated with a histogram as an evaluation score related to the iris pattern IRP.

[0172] 17(a) to 17(c) show a second display example of the evaluation score according to embodiment 1. 17(a) to 17(c) show display examples of the evaluation score when a board on which a plurality of test charts 100 are attached is placed at different distances from the photographing device CM and photographed. In each of Figs. 17(a) to 17(c), the evaluation score for each of the plurality of chart photographed images is displayed in association with the chart photographed image by changing the color or density of the image at the position of the chart photographed image.

[0173] For example, in the example shown in Fig. 17(b), the evaluation scores are generally good for the entire set of multiple chart-captured images. In contrast, in the examples shown in Fig. 17(a) and (c), the evaluation scores are generally not good for some of the multiple chart-captured images. This shows that the shooting distance used to create the example in Fig. 17(b) is suitable for iris authentication, and that a wide angle of view can be used to obtain images suitable for iris authentication.

[0174] By performing such evaluation processing, if the evaluation score is high, it can be confirmed that the shooting environment and shooting settings are suitable for taking pictures for iris authentication. On the other hand, if the evaluation score is low, the shooting environment or shooting settings may not be suitable for taking pictures for iris authentication, so the user can take measures such as changing the shooting environment or shooting settings.

[0175] When a test chart 100 including multiple iris patterns IRP is used, by referring to the evaluation score, it is possible to confirm whether the shooting environment and shooting settings are suitable for shooting for iris authentication for the entire test chart 100. Therefore, it is possible to confirm whether the shooting environment and shooting settings are suitable for shooting for iris authentication for a wider angle of view than when there is one iris pattern IRP.

[0176] When multiple test charts 100 are used, it is possible to check whether the shooting environment and shooting settings are suitable for taking pictures for iris authentication over a wider angle of view than when only one test chart 100 is used.

[0177] As described above, according to the first embodiment, the test chart 100 includes the iris pattern IRP for evaluating at least one of the shooting environment and the shooting settings.

[0178] This makes it possible to easily evaluate at least one of the shooting environment and shooting settings, and change the settings as necessary, etc. Therefore, it becomes possible to easily obtain an image suitable for iris authentication.

[0179] According to the first embodiment, the iris pattern IRP is a pattern in which the brightness differs from one another in at least some of the small regions 105_j obtained by dividing the annular iris region 104 corresponding to the iris.

[0180] This makes it possible to obtain an iris pattern IRP that resembles an iris, which allows easy evaluation of at least one of the shooting environment and shooting settings, and changes the settings, etc. as necessary. Therefore, it becomes possible to easily obtain an image suitable for iris authentication.

[0181] According to the first embodiment, the test chart 100 includes a black-eye image 102 that is configured from a circular pupil region 103 that corresponds to the pupil and an iris region 104 that is circumscribed around the pupil region 103 and has an iris pattern IRP. The multiple small regions 105_j are regions obtained by dividing the iris region 104 by one or more circles CR that are concentric with the pupil region 103 and one or more straight lines LN that pass through the center of the pupil region 103.

[0182] This makes it possible to obtain an iris pattern IRP that resembles an iris, which allows easy evaluation of at least one of the shooting environment and shooting settings, and changes the settings, etc. as necessary. Therefore, it becomes possible to easily obtain an image suitable for iris authentication.

[0183] According to the first embodiment, there are a plurality of black-eye images 102. The plurality of black-eye images 102 are provided at different positions from each other.

[0184] This allows confirmation of whether the shooting environment and shooting settings are suitable for iris authentication over a wider angle of view than when there is only one black-eye image 102. This reduces the need to repeatedly place test charts in different positions on the camera CM, shoot, and evaluate the images in order to confirm the wide angle of view. This makes it easier to obtain images suitable for iris authentication.

[0185] According to the first embodiment, the plurality of black-eye images 102 include iris patterns that are different from each other.

[0186] This makes it easier and more accurate to identify the position of the iris pattern IRP that has been successfully or unsuccessfully authenticated relative to the photographing device CM than when multiple black-eye images 102 have the same iris pattern. This makes it possible to easily and accurately evaluate at least one of the photographing environment and the photographing settings, and change the settings as necessary. This makes it easier to obtain an image suitable for iris authentication.

[0187] According to the first embodiment, the outer diameter of the iris region 104 is equal to the outer diameter of the actual iris.

[0188] This makes it possible to obtain an iris pattern IRP that is closer to the actual iris, making it possible to easily and accurately evaluate at least one of the shooting environment and shooting settings and change the settings as necessary, thereby making it easier to obtain an image suitable for iris authentication.

[0189] According to the first embodiment, the outer diameter of the iris region 104 is between 10 and 12 millimeters.

[0190] This makes it possible to obtain an iris pattern IRP that is closer to the actual iris, making it possible to easily and accurately evaluate at least one of the shooting environment and shooting settings and change the settings as necessary, thereby making it easier to obtain an image suitable for iris authentication.

[0191] According to the first embodiment, the test chart 100 includes a sheet 101. The sheet 101 is provided with an iris pattern IRP.

[0192] This makes it possible to easily photograph the iris pattern IRP, and therefore to easily obtain an image suitable for iris authentication.

[0193] According to the first embodiment, the chart creation device M1 creates a chart image including an iris pattern IRP for evaluating at least one of the shooting environment and the shooting settings.

[0194] This makes it possible to easily obtain a chart image including the iris pattern IRP, which allows easy evaluation of at least one of the shooting environment and shooting settings, and to change the settings, etc. as necessary. Therefore, it becomes possible to easily obtain an image suitable for iris authentication.

[0195] According to the first embodiment, the chart creation device M1 includes a numerical value determination unit 112, an iris pattern creation unit 113, a black eye creation unit 114, and a chart creation unit 115.

[0196] The numerical value determination unit 112 determines a plurality of numerical values ​​corresponding to each of the plurality of small regions 105_j. The iris pattern creation unit 113 creates an iris pattern IRP in which the brightness of each of the plurality of small regions 105_j corresponds to the corresponding numerical value.

[0197] The black-eye creating unit 114 creates a black-eye image 102 that is composed of a circular pupil region 103 that corresponds to the pupil and an iris region 104 that circumscribes the pupil region 103 and has an iris pattern IRP provided therein. The chart creating unit 115 creates a chart image that includes one or more black-eye images 102.

[0198] This makes it possible to easily obtain a chart image including the iris pattern IRP, which allows easy evaluation of at least one of the shooting environment and shooting settings, and to change the settings, etc. as necessary. Therefore, it becomes possible to easily obtain an image suitable for iris authentication.

[0199] Furthermore, a chart image including an iris pattern IRP can be obtained without using an actual person's iris image, etc. Therefore, even if the iris pattern IRP is leaked to a third party, it does not constitute a privacy leak, and privacy can be protected.

[0200] According to the first embodiment, the iris pattern creation unit 113 includes a first creation unit 118 and a second creation unit 119. The first creation unit 118 creates a rectangular pattern in which a rectangular area is divided into a plurality of small rectangular areas, each of which has brightness corresponding to a plurality of numerical values. The second creation unit 119 creates the iris pattern IRP by transforming the rectangular pattern into a band ring shape.

[0201] This makes it possible to easily obtain a chart image including the iris pattern IRP, which allows easy evaluation of at least one of the shooting environment and shooting settings, and to change the settings, etc. as necessary. Therefore, it becomes possible to easily obtain an image suitable for iris authentication.

[0202] Furthermore, a chart image including an iris pattern IRP can be obtained without using an actual person's iris image, etc. Therefore, even if the iris pattern IRP is leaked to a third party, it does not constitute a privacy leak, and privacy can be protected.

[0203] According to the first embodiment, the second creating unit 119 creates the iris pattern IRP by performing an operation on the rectangular pattern to convert the polar coordinate system into a Cartesian coordinate system.

[0204] This makes it possible to easily obtain a chart image including the iris pattern IRP, which allows easy evaluation of at least one of the shooting environment and shooting settings, and to change the settings, etc. as necessary. Therefore, it becomes possible to easily obtain an image suitable for iris authentication.

[0205] Furthermore, a chart image including an iris pattern IRP can be obtained without using an actual person's iris image, etc. Therefore, even if the iris pattern IRP is leaked to a third party, it does not constitute a privacy leak, and privacy can be protected.

[0206] According to the first embodiment, the evaluation device M2 includes a captured image acquisition unit 121, a registered data acquisition unit 123, a detection unit 124, a matching unit 125, a score acquisition unit 126, and an output control unit 128.

[0207] The photographed image acquisition unit 121 acquires a photographed chart image, which is an image obtained by photographing a test chart 100 or a chart image including an iris pattern IRP for evaluating at least one of a photographing environment and a photographing setting.

[0208] The registered data acquisition unit 123 acquires registered data including the iris pattern IRP contained in the test chart 100 or a chart image. The detection unit 124 detects the iris pattern IRP from the acquired photographed chart image. The matching unit 125 matches the detected iris pattern with the iris pattern IRP contained in the registered data.

[0209] The score acquisition unit 126 calculates an evaluation score for evaluating at least one of the iris pattern IRP and the chart photographed image based on at least one of the results of detection and matching. The output control unit 128 causes the output unit 127 to output a value based on the evaluation score.

[0210] This allows the user to easily evaluate whether the photographing environment and photographing settings are suitable for photographing for iris authentication using the test chart 100 or a chart image, and to change the settings as necessary, thereby easily obtaining an image suitable for iris authentication.

[0211] According to embodiment 1, the evaluation score includes at least one of the similarity of each iris pattern IRP with the iris pattern included in the registered data, the reliability indicating the degree to which the similarity is reliable, the detection time required to detect the iris pattern from the chart image, the total and average similarity values ​​for all iris patterns included in the chart photographed image, the total and average reliability values, and the total and average detection time values.

[0212] By using such an evaluation score, it is possible to easily evaluate whether the shooting environment and shooting settings are suitable for taking a picture for iris authentication, and to change the settings as necessary, etc. Therefore, it is possible to easily obtain an image suitable for iris authentication.

[0213] According to the first embodiment, the output unit 127 includes a display unit 130 that displays the evaluation score. The output control unit 128 includes a display control unit 132 that causes the display unit 130 to display at least one of an iris pattern IRP and a chart photographed image related to the evaluation score in association with the evaluation score.

[0214] This allows the user to easily refer to the evaluation score by viewing the information displayed on the display unit 130, so that the user can easily know whether the shooting environment and shooting settings are suitable for taking pictures for iris authentication and can change the settings, etc. as necessary. Therefore, it becomes possible to easily obtain an image suitable for iris authentication.

[0215] According to the first embodiment, the test chart 100 or chart image includes a plurality of black-eye images 102 that are provided at different positions and include different iris patterns IRP.

[0216] This makes it possible to check whether the shooting environment and shooting settings are suitable for iris authentication over a wider angle of view than when there is one black-eye image 102. Also, compared to when multiple black-eye images 102 have the same iris pattern, it is possible to more easily and accurately identify the position of the iris pattern IRP that has been successfully or unsuccessfully authenticated relative to the photographing device CM.

[0217] Therefore, it is possible to easily and accurately evaluate at least one of the shooting environment and shooting settings for a wide angle of view and change the settings as necessary, thereby making it easier to obtain an image suitable for iris authentication.

[0218] According to the first embodiment, the registration data includes a plurality of iris patterns IRP included in the test chart 100 or the chart image. The display control unit 132 includes a position specifying unit 134 and an associating unit 135.

[0219] Based on the result of the matching performed by the matching unit 125, the position specifying unit 134 specifies the position of the corresponding iris pattern IRP in the photographed chart image for each iris pattern IRP included in the registration data.

[0220] The associating unit 135 associates the evaluation score with the iris pattern IRP or the chart photographed image based on the identified position and displays it on the display unit 130 .

[0221] This allows the user to easily recognize whether the evaluation score relates to the iris pattern IRP or the chart image by viewing the information displayed on the display unit 130. Therefore, the user can easily know whether the shooting environment and shooting settings are suitable for shooting for iris authentication, and can change the settings as necessary. Therefore, it is possible to easily obtain an image suitable for iris authentication.

[0222] In this embodiment, an example will be described in which a chart image is displayed on a screen, so that the chart image displayed on the screen can be photographed instead of the test chart 100, and at least one of the photographing environment and the photographing settings can be easily evaluated, and the settings can be changed as necessary.

[0223] 18 is a diagram showing an example of the configuration of an information processing system 210 according to the second embodiment. The second embodiment further includes a chart display device 214. The chart display device 214 may be connected to the chart creation device M1, the photographing device CM, and the evaluation device M2 via a network N so that information can be transmitted and received between them. Except for this point, the information processing system 210 may be configured similarly to the information processing system 110 according to the first embodiment.

[0224] FIG. 19 is a diagram showing an example of the functional configuration of a chart display device 214 according to the second embodiment.

[0225] The chart display device 214 is an information processing device for displaying a chart image, and includes a chart image acquisition unit 241, a display unit 242, and a display control unit 243.

[0226] The chart image acquisition unit 241 acquires a chart image including an iris pattern for evaluating at least one of the shooting environment and the shooting settings.

[0227] The display unit 242 displays various types of information. The display control unit 243 causes the display unit 242 to display the chart image acquired by the chart image acquisition unit 241.

[0228] The chart display device 214 may be physically configured in the same manner as the chart creation device M1 according to the first embodiment (see FIG. 11 ). However, the storage device 1040 of the chart display device 214 stores program modules for realizing the functions of the chart display device 214. The communication interface 1050 of the chart display device 214 is an interface for connecting the chart display device 214 to the network N.

[0229] 20 is a flowchart showing an example of chart display processing according to embodiment 2. The chart display processing is information processing for displaying a chart image. The chart display processing is started, for example, in response to a user instruction.

[0230] The chart image acquisition unit 241 acquires a chart image including an iris pattern for evaluating at least one of the photographing environment and the photographing settings (step S201).

[0231] In detail, for example, the chart image acquiring unit 241 may acquire the chart image from the chart creation device M1. Alternatively, the chart image acquiring unit 241 may acquire the chart image from a storage unit (not shown) that stores the chart image.

[0232] The display control unit 243 causes the chart image to be displayed on the display unit 242 (step S202).

[0233] The display control unit 243 determines whether or not an end instruction to end the display has been received from the user (step S203).

[0234] If it is determined that the end instruction has not been received (step S203; No), the display control unit 243 repeatedly executes step S202, thereby allowing the chart image to be continuously displayed on the display unit 242.

[0235] If it is determined that the end instruction has been received (step S203; Yes), the display control unit 243 ends the display of the chart image and ends the chart display process.

[0236] By executing such a chart display process, it is possible to execute the same evaluation process as in embodiment 1 using a chart image displayed on the display unit 242 instead of the test chart 100 according to embodiment 1. In this case, the user may place the display unit 242 in a predetermined position and execute the chart display process to display the chart image on the display unit 242.

[0237] If the chart display device 214 is an easily portable information processing device such as a tablet terminal, the display unit 242 can be easily arranged.

[0238] Furthermore, if the screen of the display unit 242 is sufficiently large, multiple chart images may be displayed on the display unit 242. In this case, the method for arranging the multiple chart images may be set as appropriate, but for example, they may be arranged vertically and horizontally, as in embodiment 1. This makes it possible to check whether the shooting environment and shooting settings are suitable for shooting for iris authentication, over a wider angle of view than when one chart image is used, just like when multiple test charts 100 are used.

[0239] As described above, according to the second embodiment, the chart display device 214 includes the chart image acquisition unit 241 and the display control unit 243. The chart image acquisition unit 241 acquires a chart image including an iris pattern for evaluating at least one of the shooting environment and the shooting settings. The display control unit 243 causes the display unit 242 to display the chart image acquired by the chart image acquisition unit 241.

[0240] This makes it possible to easily evaluate at least one of the shooting environment and shooting settings, and change the settings as necessary, etc. Therefore, it becomes possible to easily obtain an image suitable for iris authentication.

[0241] Third Embodiment In this embodiment, an example of a specific test chart 100a will be described.

[0242] 21 is a diagram showing an example of a specific test chart 100a according to embodiment 3. The specific test chart 100a is a test chart for photography in which the resolutions of a plurality of iris patterns IRP differ from one another.

[0243] The specific test chart 100a includes a sheet 101 similar to that of the first embodiment, and ten specific black-eye images 102_1a to 102_10a provided on the sheet 101. When the specific black-eye images 102_1a to 102_10a are not particularly distinguished from one another, they are also referred to as "specific black-eye images 102a."

[0244] The number of specific black-eye images 102a included in the specific test chart 100a is not limited to 10, but may be two or more.

[0245] Each of the multiple specific black eye images 102a is a black eye image 102 provided on the specific test chart 100a. That is, each of the multiple specific black eye images 102a is an area having a pattern imitating a black eye, similar to the black eye image 102 according to the first embodiment, and is composed of a pupil area 103 and an iris area 104. The multiple specific black eye images 102a differ from one another in the resolution of the iris pattern IRP provided in the iris area 104.

[0246] As described above, the resolution of the iris pattern IRP corresponds to the number of small regions 105_j. Therefore, in the specific test chart 100a, the iris region 104 may be composed of a plurality of small regions 105_j divided by circles CR and straight lines LN, each of which has a different number of circles CR and straight lines LN. That is, for example, the user may determine the number of circles CR and straight lines LN used to divide the iris region 104 so that the number of small regions 105_j is different from one another. As a result, the iris region 104 is composed of a plurality of small regions 105_j with different numbers from one another. Therefore, iris patterns IRP with different resolutions can be obtained.

[0247] As described above, according to the third embodiment, the iris patterns IRP included in the plurality of specific black-eye images 102a have different resolutions. The resolution of the iris pattern IRP corresponds to the number of small regions 105_j into which the iris region IRP is divided.

[0248] This allows the user to easily evaluate the resolution as a shooting setting and change the setting as necessary, making it possible to easily obtain an image suitable for iris authentication.

[0249] <Embodiment 4> The specific test chart 100a described in embodiment 3 can be created using the chart creation process according to embodiment 1. Unlike embodiment 1, this embodiment describes a method for creating the specific test chart 100a or a specific test chart image based on an iris image obtained by photographing a person's iris.

[0250] Here, the "specific test chart image" is a chart image including a plurality of specific iris patterns IRPa. The "specific iris patterns IRPa" are iris patterns IRP having different resolutions. In other words, the specific test chart 100a is the photographic test chart 100 on which a plurality of specific iris patterns IRPa are provided.

[0251] The plurality of specific iris patterns IRP are iris patterns for evaluating the resolution in the photographing settings. Similar to the iris pattern IRP, each of the plurality of specific iris patterns IRPa may be a pattern in which the brightness differs from one another in at least some of the plurality of small regions 105_j obtained by dividing the annular iris region 104 corresponding to the iris.

[0252] The specific test chart 100a or the specific test chart image can be created using a chart creation device M1 that is generally similar to that of embodiment 1. Therefore, in this embodiment, the functions of the chart creation device M1 according to this embodiment will be described, focusing on the differences from embodiment 1, with reference to FIG.

[0253] The numerical value determination unit 112 determines a plurality of numerical values ​​corresponding to each of the plurality of small regions 105_j constituting each of the plurality of specific iris patterns IRPa, based on an iris image obtained by photographing a person's iris.

[0254] The iris pattern creation unit 113 creates a plurality of specific iris patterns IRPa in which the brightness of each of the plurality of small regions 105_j corresponds to a corresponding numerical value. The method by which the iris pattern creation unit 113 creates each of the plurality of specific iris patterns IRPa may be the same as the method by which the iris pattern creation unit 113 creates the iris pattern IRP in the first embodiment.

[0255] The black-eye creating unit 114 creates, for each of the multiple specific iris patterns IRPa, a specific black-eye image 102a consisting of a circular pupil region 103 corresponding to the pupil and an iris region 104 circumscribing the pupil region 103 and in which the specific iris pattern IRPa is provided.

[0256] Here, the specific black-eye image 102a is the black-eye image 102 including the specific iris pattern IRPa. That is, the specific black-eye image 102a is the black-eye image 102 including the iris patterns IRP having different resolutions.

[0257] The method by which the iris creating unit 114 creates the specific iris image 102a may be the same as the method by which the iris creating unit 114 creates the iris image 102 in the first embodiment.

[0258] The chart creation unit 115 creates a specific test chart image including the created multiple specific black-eye images 102a.

[0259] The chart output unit 116 outputs the created specific test chart image to at least one of the chart storage unit 117, the chart printing unit PRN, and the like.

[0260] The chart storage unit 117 may store the specific test chart image output from the chart output unit 116. The chart printing unit PRN may print the specific test chart image output from the chart output unit 116. Details of the chart printing unit PRN may be the same as those in the first embodiment.

[0261] The chart creation device M1 according to this embodiment may be physically configured in the same manner as the chart creation device M1 according to the first embodiment (see FIG. 11).

[0262] The specific test chart 100a or the specific test chart image can be created using a chart creation process that is generally similar to that of embodiment 1. Therefore, in this embodiment, the chart creation process according to this embodiment will be described with reference to FIG. 12 , focusing on the differences from embodiment 1.

[0263] The numerical value determination unit 112 determines a plurality of numerical values ​​corresponding to each of the plurality of small regions 105_j included in the specific iris pattern IRPa based on an iris image obtained by photographing a person's iris (step S101).

[0264] In more detail, for example, the numerical value determination unit 112 determines a numerical value corresponding to each of the plurality of small regions 105_j constituting each of the plurality of specific iris patterns IRPa based on pixel values ​​of a portion of the iris image corresponding to the small region 105_j. For example, the numerical value determination unit 112 may determine the numerical value corresponding to the small region 105_j in accordance with a predetermined rule, depending on the sum or average of the pixel values ​​of the portion corresponding to the small region 105_j.

[0265] The numerical values ​​determined by the numerical value determination unit 112 may correspond to the gradations of the plurality of small regions 105_j. For example, if the brightness of each of the plurality of small regions 105_j is represented by two gradations of white and black, the numerical values ​​determined by the numerical value determination unit 112 may be associated in advance with the gradations of white and black.

[0266] The iris pattern creating unit 113 creates a specific iris pattern IRPa in which the brightness of each of the small regions 105_j corresponds to the corresponding numerical value (step S102). The iris creating unit 114 creates a specific iris image 102a (step S103).

[0267] The black-eye creating unit 114 determines whether a predetermined number of specific black-eye images 102a have been created (step S104). If it is determined that the predetermined number of specific black-eye images 102a have not been created (step S104; No), steps S101 to S103 are executed again.

[0268] If it is determined that a predetermined number of specific black eye images 102a have been created (step S104; Yes), the chart creation unit 115 creates a specific test chart image including the specific black eye images 102a created in step S104 (step S105).

[0269] The chart output unit 116 outputs the specific test chart image created in step S105 (step S106), and the chart creation process ends.

[0270] Here, the details of steps S102 to S106 according to this embodiment may be substantially the same as those according to the first embodiment.

[0271] When the specific test chart image is output to the chart printing unit PRN, the chart printing unit PRN prints the specific test chart image on a medium such as a sheet 101, paper, or sticker, as in the first embodiment. By attaching the paper or sticker on which the specific test chart image is printed to the sheet 101, the specific test chart 100a can be created.

[0272] As described above, according to the fourth embodiment, the chart image is a specific test chart image including a plurality of specific iris patterns IRPa, which are iris patterns for evaluating resolution in shooting settings. Each of the multiple specific iris patterns IRPa is a pattern in which the brightness of at least some of the multiple small regions 105_j obtained by dividing the annular iris region 104 corresponding to the iris differs from one another. The resolution corresponds to the number of small regions 105_j that make up each of the multiple specific iris patterns IRPa. The resolutions of the multiple specific iris patterns IRPa are different from one another.

[0273] This makes it possible to easily obtain the specific test chart 100a or a specific test chart image, making it possible to easily evaluate the resolution and change settings as necessary, thereby making it possible to easily obtain an image suitable for iris authentication.

[0274] According to the fourth embodiment, the numerical value determination unit 112 determines a plurality of numerical values ​​corresponding to each of the plurality of small regions 105_j constituting each of the plurality of specific iris patterns IRPa based on an iris image obtained by photographing a person's iris. The iris pattern creation unit 113 creates a plurality of specific iris patterns IRPa in which the plurality of small regions 105_j have brightnesses according to the corresponding numerical values.

[0275] The black-eye creating unit 114 creates, for each of the multiple specific iris patterns IRPa, a specific black-eye image 102a consisting of a circular pupil region 103 corresponding to the pupil and an iris region 104 in which the specific iris pattern IRPa is provided and circumscribes the pupil region 103. The chart creating unit 115 creates a specific test chart image including the multiple specific black-eye images 102a created.

[0276] This makes it possible to easily obtain the specific test chart 100a or a specific test chart image, making it possible to easily evaluate the resolution and change settings as necessary, thereby making it possible to easily obtain an image suitable for iris authentication.

[0277] Furthermore, by limiting the use of iris images to specific test chart images for evaluating resolution, privacy can be protected.

[0278] According to the fourth embodiment, the brightness of each of the plurality of small regions 105_j is expressed in two gradations. The numerical value determination unit 112 determines a numerical value corresponding to each of the plurality of small regions 105_j that constitute each of the plurality of specific iris patterns IRPa, based on pixel values ​​of a portion of the iris image that corresponds to the small region 105_j. The determined numerical value corresponds to the gradation of the brightness.

[0279] This makes it possible to easily obtain the specific test chart 100a or a specific test chart image, making it possible to easily evaluate the resolution and change settings as necessary, thereby making it possible to easily obtain an image suitable for iris authentication.

[0280] Furthermore, by limiting the use of iris images to specific test chart images for evaluating resolution, privacy can be protected.

[0281] Fifth Embodiment In the fourth embodiment, a method for creating the specific test chart 100a or a specific test chart image was described. In the present embodiment, a method for evaluating resolution using the specific test chart 100a or a specific test chart image will be described.

[0282] The evaluation of the resolution using the specific test chart 100a or a specific test chart image can be performed using an evaluation device M2 that is generally similar to that in embodiment 1. Therefore, in this embodiment, the functions of the evaluation device M2 according to this embodiment will be described with reference to FIG. 10 , focusing on the differences from embodiment 1.

[0283] The photographing test chart or chart image according to this embodiment is a specific test chart 100a or a specific test chart image that includes a plurality of specific iris patterns IRPa, which are iris patterns for evaluating the resolution in the photographing settings.

[0284] The chart photographed image according to this embodiment is a specific test chart photographed image obtained by photographing the specific test chart 100a or a chart image.

[0285] The registration data according to this embodiment includes a plurality of specific iris patterns that the specific test chart 100a or chart image has.

[0286] The evaluation score according to the present embodiment includes a resolution evaluation score for evaluating each of the multiple specific iris patterns IRPa. The resolution evaluation score is at least one of a false acceptance index and a similarity between the detected specific iris pattern IRPa and a specific iris pattern IRPa included in the enrollment data.

[0287] Here, the false acceptance index is an index indicating the possibility of false acceptance. False acceptance refers to misidentifying a false person who is attempting authentication as the person in question. The false acceptance index is, for example, an index indicating the degree of false acceptance relative to the similarity evaluated in advance for the authentication device using an arbitrary iris database. In this case, the false acceptance index is, for example, a value obtained by converting the similarity between the detected specific iris pattern IRPa and the specific iris pattern IRPa included in the registration data. Note that the index is not limited to a value, and may also be a symbol, a code, or the like.

[0288] The photographed image acquisition unit 121 acquires a photographed image of the specific test chart. The detection unit 124 detects a plurality of specific iris patterns IRPa from the acquired photographed image of the specific test chart.

[0289] The matching unit 125 matches the detected specific iris patterns IRPa with the specific iris patterns IRPa included in the registration data. The score acquisition unit 126 calculates a resolution evaluation score for each of the specific iris patterns IRPa based on at least one of the results of the detection and the matching.

[0290] The output control unit 128 causes the output unit 127 to output the resolution specified based on the resolution evaluation score.

[0291] FIG. 22 is a diagram illustrating an example of the functional configuration of the output control unit 128 according to the fifth embodiment.

[0292] The output control unit 128 according to this embodiment includes a display control unit 132 and a transmission control unit 133 similar to those in the first embodiment, and a resolution specifying unit 351 .

[0293] The resolution specifying unit 351 specifies the resolution of the specific iris pattern IRPa corresponding to the maximum resolution evaluation score among the multiple resolution evaluation scores obtained for the multiple specific iris patterns IRPa. This resolution is a value based on the evaluation scores.

[0294] The transmission control unit 133 according to this embodiment causes the transmission unit 131 to transmit the resolution specified by the resolution specifying unit 351 .

[0295] The evaluation device M2 according to this embodiment may be physically configured in the same manner as the evaluation device M2 according to the first embodiment (see FIG. 11).

[0296] (Example of Evaluation Processing According to Fifth Embodiment) FIG. 23 is a flowchart showing an example of evaluation processing according to the fifth embodiment.

[0297] Before starting the evaluation process, the user places, for example, the specific test chart 100a or the specific test chart image in a predetermined position. The specific test chart image can be placed in the same manner as the method for placing the chart image in embodiment 2. Then, upon receiving an instruction from the user, the photographing device CM photographs the specific test chart 100a or the specific test chart image and generates a photographed chart image including the specific test chart 100a or the specific test chart image, and the evaluation device M2 starts the evaluation process.

[0298] The photographed image acquisition unit 121 acquires, from the photographing device CM, a photographed image of the specific test chart generated by the photographing device CM (step S521).

[0299] The enrollment data acquisition unit 123 acquires enrollment data from the enrollment data storage unit 122 (step S522), as in the first embodiment. This enrollment data may include a plurality of specific iris patterns IRPa.

[0300] The detection unit 124 detects the specific iris pattern IRPa from the specific test chart photographed image acquired in step S121 (step S523). At this time, the detection unit 124 may measure the detection time required to detect the specific iris pattern IRPa from the specific test chart photographed image, as in the first embodiment.

[0301] The matching unit 125 matches the specific iris pattern IRPa detected by the detection unit 124 with the specific iris pattern IRPa included in the registration data (step S524).

[0302] Details of the matching process in step S524 are generally similar to the matching process in step S124 according to embodiment 1. That is, in step S524, processing may be performed in which the "iris pattern IRP" according to embodiment 1 is replaced with the "specific iris pattern IRPa."

[0303] The score acquisition unit 126 calculates a resolution evaluation score based on the results of at least one of the detection performed by the detection unit 124 (i.e., the detection process of step S523) and the matching performed by the matching unit 125 (i.e., the matching process of step S524) (step S525).

[0304] In detail, for example, the score acquiring unit 126 may obtain a resolution evaluation score for each of the multiple specific iris patterns IRPa.

[0305] Furthermore, as described above, the resolution evaluation score may include at least one of an index indicating the possibility of acceptance of a different person through matching and a similarity between the detected specific iris pattern IRPa and the specific iris pattern IRPa included in the registered data. Note that the resolution evaluation score may include an index similar to the evaluation score described in the first embodiment.

[0306] The output unit 127 outputs a value based on the resolution evaluation score calculated in step S525 (step S526).

[0307] In step S526 according to this embodiment, the transmission control unit 133 causes the transmission unit 131 to transmit the resolution of the specific iris pattern IRPa corresponding to the maximum resolution evaluation score.

[0308] In detail, for example, the resolution specifying unit 351 specifies the resolution of the specific iris pattern IRPa corresponding to the maximum resolution evaluation score among the multiple resolution evaluation scores calculated in step S525 (step S5261).

[0309] The transmission control unit 133 causes the transmission unit 131 to transmit the resolution specified in step S5261 (step S5262), and ends the evaluation process.

[0310] More specifically, for example, the transmission control unit 133 may transmit the resolution to a device that creates a chart image (for example, the chart creation device M1 described in the first embodiment). The resolution corresponding to the maximum resolution evaluation score is likely to correspond to the resolution of an image suitable for iris authentication. Therefore, the device that creates the chart image can create the chart image at an appropriate resolution. The display control unit 132 may also display the resolution on the display unit 130.

[0311] By performing such evaluation processing, it is possible to estimate the image resolution suitable for iris authentication.

[0312] As described above, according to the fifth embodiment, the test chart or chart image for photography is the specific test chart 100a or specific test chart image including a plurality of specific iris patterns IRPa, which are iris patterns for evaluating the resolution in the photography settings.

[0313] The chart photographed image is a photographed image of the specific test chart 100a or a chart image. The registered data includes a plurality of specific iris patterns included in the specific test chart 100a or the chart image. The evaluation score includes a resolution evaluation score for evaluating each of the plurality of specific iris patterns IRPa.

[0314] The captured image acquisition unit 121 acquires a captured image of a specific test chart. The detection unit 124 detects multiple specific iris patterns IRPa from the acquired captured image of the specific test chart. The matching unit 125 matches the detected multiple specific iris patterns IRPa with multiple specific iris patterns IRPa included in the registration data. The score acquisition unit 126 calculates a resolution evaluation score for each of the multiple specific iris patterns IRPa based on at least one of the results of detection and matching. The output control unit 128 causes the output unit 127 to output the resolution determined based on the resolution evaluation score.

[0315] This allows the resolution of an image suitable for iris authentication to be estimated. Then, by creating a test chart 100 or chart image using that resolution, it is possible to easily and accurately evaluate at least one of the shooting environment and shooting settings other than the resolution, and change the settings as necessary. Therefore, it becomes possible to more easily obtain an image suitable for iris authentication.

[0316] According to the fifth embodiment, the output unit 127 transmits the specific test chart image to a device that creates the specific test chart image. The output control unit 128 includes a resolution specifying unit 351 and a transmission control unit 133.

[0317] The resolution specifying unit 351 specifies the resolution of the specific iris pattern IRPa corresponding to the maximum resolution evaluation score among the multiple resolution evaluation scores obtained for the multiple specific iris patterns IRPa. The transmission control unit 133 causes the output unit 127 to transmit the specified resolution.

[0318] This allows the image resolution suitable for iris authentication to be transmitted to a device that creates a specific test chart image, making it easy to create a test chart 100 or chart image using that resolution. Using this test chart 100 or chart image, it is possible to easily and accurately evaluate at least one of the shooting environment and shooting settings other than the resolution, and change the settings as necessary. This makes it easier to obtain an image suitable for iris authentication.

[0319] According to the fifth embodiment, the resolution evaluation score is at least one of an index indicating the possibility of accepting a different person through matching, and the similarity between the detected specific iris pattern IRPa and the specific iris pattern IRPa included in the registration data.

[0320] This allows for accurate estimation of the image resolution suitable for iris authentication. Then, by creating a test chart 100 or chart image using that resolution, it is possible to easily and accurately evaluate at least one of the shooting environment and shooting settings other than the resolution, and change the settings as necessary. Therefore, it becomes possible to more easily obtain an image suitable for iris authentication.

[0321] Sixth Embodiment In this embodiment, an example of adjusting the image capturing environment based on the evaluation score will be described.

[0322] The information processing system according to this embodiment includes an evaluation device M6 instead of the evaluation device M2 according to embodiment 1. Except for this point, the information processing system according to this embodiment may be configured similarly to the information processing system 110 according to embodiment 1.

[0323] 24 is a diagram illustrating an example of the functional configuration of an evaluation device M6 according to embodiment 6. The evaluation device M6 includes an adjustment control unit 661 and an environment adjustment unit 662 in addition to the functions of the evaluation device M2 according to embodiment 1.

[0324] The environment adjustment unit 662 adjusts the shooting environment or supports the adjustment of the shooting environment. For example, the environment adjustment unit 662 is a device that opens and closes curtains in the room where shooting is performed, or a device that displays a message prompting the user to open and close the curtains. By opening and closing the curtains, the lighting environment can be adjusted.

[0325] The adjustment control unit 661 performs processing to adjust the shooting environment based on the evaluation score obtained by the score acquisition unit 126 .

[0326] In detail, for example, the adjustment control unit 661 controls the environment adjustment unit 662 based on the evaluation score obtained by the score acquisition unit 126 .

[0327] The evaluation device M6 may be physically configured in the same manner as the evaluation device M2 according to the first embodiment (see FIG. 11).

[0328] 25 is a flowchart showing an example of environment adjustment processing according to the sixth embodiment. The environment adjustment processing is processing for adjusting the shooting environment. The environment adjustment processing may be performed, for example, following the evaluation processing. In this embodiment, an example in which the environment adjustment processing is performed following the evaluation processing according to the first embodiment will be described.

[0329] The adjustment control unit 661 acquires the evaluation score calculated in step S125 (step S601).

[0330] The adjustment control unit 661 performs processing to adjust the shooting environment based on the evaluation score acquired in step S601 (step S602), and ends the environment adjustment processing.

[0331] In detail, for example, the adjustment control unit 661 performs processing to adjust the shooting environment based on the evaluation score and a predetermined rule. The adjustment control unit 661 may control the environment adjustment unit 662 to adjust the shooting environment, for example.

[0332] By performing such an environment adjustment process, the photographing environment can be adjusted based on the evaluation score, making it easier to make the photographing environment suitable for photographing for iris authentication.

[0333] As described above, according to the sixth embodiment, the evaluation device M6 further includes the adjustment control unit 661 that performs processing to adjust the shooting environment based on the evaluation score.

[0334] This makes it easy to create a shooting environment suitable for taking pictures for iris authentication, and therefore makes it easy to obtain an image suitable for iris authentication.

[0335] Although the embodiments and modifications of the present invention have been described above with reference to the drawings, these are merely examples of the present invention, and various configurations other than those described above can also be adopted.

[0336] In addition, although the flowcharts used in the above description show multiple steps (processes) in a sequential order, the order of steps performed in each embodiment is not limited to the order shown. In each embodiment, the order of steps shown in the drawings can be changed as long as it does not cause any problems in terms of content. Furthermore, the above-described embodiments and variations can be combined as long as the content is not contradictory.

[0337] Some or all of the above-described embodiments can be described as, but are not limited to, the following supplementary notes.

[0338] 1. A photography test chart including an iris pattern for evaluating at least one of the photography environment and photography settings. 2. The photography test chart described in 1., in which the iris pattern is a pattern in which the brightness differs from one another in at least some of a plurality of small regions obtained by dividing a ring-shaped iris region corresponding to the iris. 3. The photography test chart described in 2., in which the photography test chart includes a iris image configured from a circular pupil region corresponding to the pupil and an iris region circumscribing the pupil region and having the iris pattern provided thereon, the plurality of small regions being regions obtained by dividing the iris region by one or more circles concentric with the pupil region and one or more straight lines passing through the center of the pupil region. 4. The photography test chart described in 3., in which there are a plurality of iris images, and the plurality of iris images are provided at different positions from one another. 5. The photography test chart described in 4., in which the plurality of iris images include iris patterns that differ from one another. 6. The photography test chart described in 5., in which the iris patterns included in the plurality of black-eye images have different resolutions, and the resolution of the iris pattern corresponds to the number of small regions obtained by dividing the iris region. 7. The photography test chart described in any one of 2. to 6., in which the outer diameter of the iris region is equal to the outer diameter of the actual iris. 8. The photography test chart described in any one of 2. to 7., in which the outer diameter of the iris region is 10 to 12 millimeters. 9. The photography test chart described in any one of 1. to 8., in which the photographing test chart comprises a sheet, and the iris pattern is provided on the sheet. 10. An information processing device that creates a chart image including an iris pattern for evaluating at least one of a photographing environment and a photographing setting. 11. The information processing device described in 10., in which the iris pattern is a pattern in which brightness differs from one another in at least some of the small regions obtained by dividing a ring-shaped iris region corresponding to the iris.12. The information processing device described in 11., comprising: numerical value determination means for determining a plurality of numerical values ​​corresponding to each of the plurality of small regions; iris pattern creation means for creating the iris pattern in which the plurality of small regions have brightnesses corresponding to the corresponding numerical values; iris image creation means for creating a iris image composed of a circular pupil region corresponding to a pupil and the iris region circumscribing the pupil region and having the iris pattern provided thereon; and chart creation means for creating a chart image including one or a plurality of the iris images. 13. The information processing device described in 12., wherein the iris pattern creation means includes: first creation means for creating a rectangular pattern in which a plurality of small rectangular regions obtained by dividing a rectangular region have brightnesses corresponding to the plurality of numerical values; and second creation means for creating the iris pattern by transforming the rectangular pattern into a ring-shaped pattern. 14. The information processing device described in 13., wherein the second creation means creates the iris pattern by performing an operation on the rectangular pattern to convert a polar coordinate system to a Cartesian coordinate system. 15. The information processing device described in any one of 12. to 14., wherein the chart image is a specific test chart image including a plurality of specific iris patterns that are iris patterns for evaluating resolution in the shooting settings, each of the plurality of specific iris patterns being a pattern in which brightness differs from one another in at least some of a plurality of small regions obtained by dividing a ring-shaped iris region corresponding to the iris, the resolution corresponds to the number of small regions that make up each of the plurality of specific iris patterns, and the resolutions of the plurality of specific iris patterns are different from one another.16. The information processing device described in 15., wherein the numerical value determination means determines a plurality of numerical values ​​corresponding to each of the plurality of small regions constituting each of the plurality of specific iris patterns based on an iris image obtained by photographing a human iris, the iris pattern creation means creates the plurality of specific iris patterns in which the plurality of small regions have brightnesses according to the corresponding numerical values, the iris creation means creates, for each of the plurality of specific iris patterns, a specific iris image composed of a circular pupil region corresponding to a pupil and the iris region circumscribing the pupil region and in which the specific iris pattern is provided, and the chart creation means creates a specific test chart image including the plurality of specific iris images. 17. The information processing device described in 16., wherein the brightness of each of the plurality of small regions is represented by two gradations, and the numerical value determination means determines a numerical value corresponding to each of the plurality of small regions constituting each of the plurality of specific iris patterns based on pixel values ​​of portions of the iris image corresponding to each of the plurality of small regions constituting the plurality of specific iris patterns, and the determined numerical value corresponds to the gradation of brightness. 19. An information processing method in which one or more computers create a chart image including an iris pattern for evaluating at least one of the shooting environment and the shooting settings. 20. An information processing device comprising: chart image acquisition means for acquiring a chart image including an iris pattern for evaluating at least one of the shooting environment and the shooting settings, and display control means for displaying the chart image on display means. 21. An information processing method in which one or more computers acquire a chart image including an iris pattern for evaluating at least one of the shooting environment and the shooting settings, and display the chart image on display means. 22. A recording medium in which a program is recorded in which one or more computers acquire a chart image including an iris pattern for evaluating at least one of the shooting environment and the shooting settings, and display the chart image on display means.23. An information processing device comprising: a captured image acquisition means for acquiring a chart image, which is an image obtained by capturing a photography test chart or a chart image including an iris pattern for evaluating at least one of a photography environment and a photography setting; a registration data acquisition means for acquiring registration data including the iris pattern of the photography test chart or the chart image; a detection means for detecting an iris pattern from the acquired chart image; a comparison means for comparing the detected iris pattern with an iris pattern included in the registration data; a score acquisition means for determining an evaluation score for evaluating at least one of the iris pattern and the chart image based on a result of at least one of the detection and the comparison; and an output control means for causing an output means to output a value based on the evaluation score. 23. The information processing device described in 23 or 24, wherein the evaluation score includes at least one of the similarity for each of the iris patterns included in the photographed chart image, a reliability indicating the degree to which the similarity is reliable, the detection time required to detect an iris pattern from the photographed chart image, the total and average values ​​of the similarity for all of the iris patterns included in the photographed chart image, the total and average values ​​of the reliability, and the total and average values ​​of the detection time. 25. The information processing device described in 23 or 24, wherein the output means includes display means for displaying the evaluation score, and the output control means includes display control means for causing the display means to display at least one of the iris pattern and the photographed chart image to which the evaluation score is related, in association with the evaluation score. 26. The information processing device described in 25., wherein the photographing test chart or the chart image includes a plurality of black-eye images provided at different positions from each other and including different iris patterns from each other.27. The information processing device described in 26., wherein the registration data includes a plurality of iris patterns included in the photography test chart or the chart image, and the display control means includes: position specifying means for specifying, for each iris pattern included in the registration data based on a result of matching, a position in the photographed chart image of a corresponding iris pattern, and associating means for displaying, on a display means, the evaluation score related to the registered iris pattern in association with the iris pattern IRP or the photographed chart image including the iris pattern IRP based on the specified position. 28. The information processing device described in any one of 23. to 27., further comprising adjustment control means for performing processing to adjust the photography environment based on the evaluation score. 29. 29. The information processing device described in any one of 23. to 28., wherein the photographing test chart or the chart image is a specific test chart or a specific test chart image including a plurality of specific iris patterns that are iris patterns for evaluating resolution in the photographing settings, the photographed chart image is a specific test chart photographed image obtained by photographing the specific test chart or the chart image, the registered data includes a plurality of specific iris patterns included in the specific test chart or the chart image, the evaluation score includes a resolution evaluation score for evaluating each of the plurality of specific iris patterns, the photographed image acquisition means acquires the photographed image of the specific test chart, the detection means detects a plurality of specific iris patterns from the acquired photographed image of the specific test chart, the matching means matches the detected plurality of specific iris patterns with a plurality of specific iris patterns included in the registered data, the score acquisition means determines the resolution evaluation score for each of the plurality of specific iris patterns based on at least one of a result of the detection and the matching, and the output control means causes the output means to output the resolution determined based on the resolution evaluation score.30. The information processing device described in 29., wherein the output means includes transmission means for transmitting to a device that creates a specific test chart image, and the output control means includes resolution specifying means for specifying the resolution of the specific iris pattern corresponding to the largest resolution evaluation score among the multiple resolution evaluation scores calculated for the multiple specific iris patterns, and transmission control means for causing the transmission means to transmit the specified resolution. 31. The information processing device described in 29. or 30., wherein the resolution evaluation score is at least one of an index indicating the possibility of acceptance of a different person through matching and a similarity between the detected specific iris pattern and a specific iris pattern included in the registration data. 32. 32. An information processing method in which one or more computers acquire a photographed chart image, which is an image obtained by photographing a photography test chart or chart image including an iris pattern for evaluating at least one of a photography environment and a photography setting, acquire registered data including the iris pattern of the photography test chart or chart image, detect an iris pattern from the acquired photographed chart image, compare the detected iris pattern with an iris pattern included in the registered data, determine an evaluation score for evaluating at least one of the iris pattern and the chart image based on a result of at least one of the detection and the comparison, and output the evaluation score to an output means. A recording medium having recorded thereon a program for causing one or more computers to execute the following: acquire a chart photographed image, which is an image obtained by photographing a test chart for photography or a chart image including an iris pattern for evaluating at least one of a photography environment and a photography setting; acquire registered data including the iris pattern of the test chart for photography or the chart image; detect an iris pattern from the acquired chart photographed image; compare the detected iris pattern with an iris pattern included in the registered data; determine an evaluation score for evaluating at least one of the iris pattern and the chart image based on at least one of the results of the detection and the comparison; and output the evaluation score to an output means.

[0339] 100 Test chart for photography (test chart) 100a Specific test chart 101 Sheet 102 Black eye image 102a Specific black eye image 103 Pupil region 104 Iris region 105_j, 105_1 to 105_48 Small region 110, 210 Information processing system M1 Chart creation device (information processing device) M2, M6 Evaluation device (information processing device) CM Photography device 112 Numerical value determination unit 113 Iris pattern creation unit 114 Black eye creation unit 115 Chart creation unit 116 Chart output unit 117 Chart storage unit 118 First creation unit 119 Second creation unit 121 Photographed image acquisition unit 122 Registered data storage unit 123 Registered data acquisition unit 124 Detection unit 125 Matching unit 126 Score acquisition unit 127 Output unit 128 Output control unit 130 Display unit 131 Transmission unit 132 Display control unit 133 Transmission control unit 134 Position identification unit 135 Association unit 214 Chart display device (information processing device) 241 Chart image acquisition unit 242 Display unit 243 Display control unit 351 Resolution identification unit 661 Adjustment control unit 662 Environment adjustment unit

Claims

1. A test chart for photographing, including an iris pattern for evaluating at least one of a photographing environment and photographing settings. The test chart for photographing.

2. The iris pattern is a pattern in which brightnesses are different from each other in at least a part of a plurality of small regions obtained by dividing an annular iris region corresponding to the iris, a circular pupil region corresponding to the pupil, and a black-eye image including the iris region circumscribing the pupil region and provided with the iris pattern, wherein the plurality of small regions are regions obtained by dividing the iris region with one or a plurality of circles concentric with the pupil region and one or a plurality of straight lines passing through the center of the pupil region. The test chart for photographing according to Claim 1.

3. An information processing apparatus that creates a chart image including an iris pattern for evaluating at least one of a photographing environment and photographing settings. The information processing apparatus.

4. The iris pattern is a pattern in which brightnesses are different from each other in at least a part of a plurality of small regions obtained by dividing an annular iris region corresponding to the iris, numerical value determination means for determining a plurality of numerical values corresponding to the plurality of small regions, iris pattern creation means for creating the iris pattern having brightnesses corresponding to the numerical values corresponding to the plurality of small regions respectively, black-eye creation means for creating a black-eye image including a circular pupil region corresponding to the pupil and the iris region circumscribing the pupil region and provided with the iris pattern, and chart creation means for creating a chart image including one or a plurality of the black-eye images. The information processing apparatus according to Claim 3.

5. An information processing method in which one or more computers create a chart image including an iris pattern for evaluating at least one of a photographing environment and photographing settings. The information processing method.

6. A program for causing one or more computers to execute creating a chart image including an iris pattern for evaluating at least one of a photographing environment and photographing settings. The program.

7. An imaging image acquisition means for acquiring a chart imaging image that is an image obtained by imaging a test chart for photographing or a chart image including an iris pattern for evaluating at least one of a photographing environment and photographing settings, a registered data acquisition means for acquiring registered data including the iris pattern of the test chart for photographing or the chart image, and a detection means for detecting the iris pattern from the acquired chart imaging image. collation means for collating the detected iris pattern with the iris pattern included in the registration data; score acquisition means for obtaining an evaluation score for evaluating at least one of the iris pattern and the chart captured image based on at least one of the results of the detection and the collation; output control means for causing an output means to output a value based on the evaluation score An information processing apparatus.

8. The evaluation score includes at least one of the similarity for each iris pattern included in the chart captured image, the reliability indicating the degree to which the similarity can be trusted, and the detection time required to detect the iris pattern from the chart captured image, the total value and average value of the similarity for the entire iris pattern included in the chart captured image, the total value and average value of the reliability, and the total value and average value of the detection time. The information processing apparatus according to claim 7.

9. One or more computers acquire a chart captured image that is an image of a test chart for photographing or a chart image including an iris pattern for evaluating at least one of a photographing environment and photographing settings, acquire registration data including the iris pattern of the test chart for photographing or the chart image, detect an iris pattern from the acquired chart captured image, collate the detected iris pattern with the iris pattern included in the registration data, obtain an evaluation score for evaluating at least one of the iris pattern and the chart captured image based on at least one of the results of the detection and the collation, cause an output means to output a value based on the evaluation score An information processing method.

10. One or more computers acquire a chart captured image that is an image of a test chart for photographing or a chart image including an iris pattern for evaluating at least one of a photographing environment and photographing settings, acquire registration data including the iris pattern of the test chart for photographing or the chart image, detect an iris pattern from the acquired chart captured image, collate the detected iris pattern with the iris pattern included in the registration data, obtain an evaluation score for evaluating at least one of the iris pattern and the chart captured image based on at least one of the results of the detection and the collation, for causing the above to be executed to cause an output means to output a value based on the evaluation score Program.

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