IMAGE JUDGMENT DEVICE, IMAGE JUDGMENT METHOD, AND IMAGE JUDGMENT PROGRAM

Abstract

To improve accuracy of reinforcing bar specification determination.SOLUTION: An image determination apparatus (1) comprises: an image processing unit (131) for calculating a diameter of a reinforcing bar from a photographed image of the reinforcing bar; an acquisition unit (132) for acquiring manufacturer information indicating a manufacturer of the reinforcing bar; and a specification determination unit (133) for referring, for each manufacturer, to reinforcing bar specification information in which specification data indicating a reinforcing bar specification and reinforcing bar range data indicating a range of the diameter of the reinforcing bar of the specification are associated with each other and determining the reinforcing bar specification from the calculated diameter of the reinforcing bar and the acquired manufacturer information.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an image judgment device, an image judgment method, and an image judgment program. [Background technology]

[0002] Currently, development is underway for a device that captures digital images and calculates three-dimensional positions through image processing. A technology is being considered in which such a device is applied to bar arrangement inspection to inspect rebar diameter, rebar spacing, etc. For example, Patent Document 1 discloses a device that determines the standard of a rebar based on the maximum diameter of the rebar obtained from a captured image and rebar standard information that indicates the maximum diameter range for each standard. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-40549 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, it is often difficult to calculate the maximum diameter of a rebar from a photographed image. This is because deformed rebars, which have irregularities such as knots and ribs on the surface, have a small area of ​​the rebar's outer shape that shows the maximum diameter. Furthermore, at the actual site where the rebar is measured, there are various error factors such as the influence of lighting, dirt, rust, background rebars, and the position of ribs, making it difficult to calculate the diameter from the area that shows the maximum diameter. Also, in order to calculate the minimum diameter of a rebar, it is necessary to calculate from the area that shows the minimum diameter, and it is not possible to calculate from the entire edge of the rebar.

[0005] On the other hand, when calculating the rebar diameter from the entire rebar edge, many edges are used, such as the area showing the maximum diameter, the area showing the minimum diameter, the middle of the nodes, etc., so the rebar diameter can be calculated stably. In this case, the rebar diameter is included in the range between the minimum diameter and the maximum diameter.

[0006] However, if the rebar diameter calculated from the entire rebar edge is close to the maximum or minimum diameter of the standard, it becomes necessary to determine which of the adjacent standards it belongs to. First, as shown in the left diagram of Figure 8, the range of rebar diameters for each standard (e.g., Da) is the sum of the ranges of rebar diameters for each manufacturer. In that case, as shown in the right diagram of Figure 8, there may be an overlapping portion H of the rebar diameter ranges between adjacent rebar standards Da and Db.

[0007] This is because the range of rebar diameters varies not only for individual rebars but also for rebar manufacturers. For example, if the range of diameters from the minimum to maximum for each rebar standard were to include the range of diameters from the minimum to maximum for each rebar manufacturer, the maximum diameter of manufacturer B would be larger than the maximum diameter of manufacturer A corresponding to rebar standard Da, and the minimum diameter of manufacturer A would be smaller than the minimum diameter of manufacturer B corresponding to rebar standard Db, resulting in a wider overlapping area H of the ranges from the minimum to maximum diameters between adjacent rebar standards Da and Db.

[0008] Furthermore, if the calculated reinforcing bar diameter falls within the range of portion H, it is difficult to determine whether the reinforcing bar standard is Da or Db, so the wider the overlapping portion H, the lower the accuracy of the reinforcing bar standard determination may become.

[0009] One aspect of the present invention aims to improve the accuracy of reinforcing bar standard determination. [Means for solving the problem]

[0010] In order to solve the above problems, an image assessment device according to one embodiment of the present invention includes an image processing unit that calculates the diameter of a reinforcing bar from an image of the reinforcing bar, an acquisition unit that acquires manufacturer information indicating the manufacturer of the reinforcing bar, and a standard assessment unit that determines the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired manufacturer information by referring to reinforcing bar standard information that associates, for each reinforcing bar manufacturer, standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for that standard.

[0011] In addition, in order to solve the above problems, an image assessment device according to one embodiment of the present invention includes an image processing unit that calculates the diameter of the reinforcing bar from an image of the reinforcing bar, an acquisition unit that acquires site information indicating the site where the reinforcing bar is used, and a standard assessment unit that determines the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired site information, by referring to reinforcing bar standard information that corresponds, for each site where the reinforcing bar is used, standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard.

[0012] In addition, in order to solve the above problems, an image assessment method according to one embodiment of the present invention includes an image processing step of calculating the diameter of a reinforcing bar from an image of the reinforcing bar, an acquisition step of acquiring manufacturer information indicating the manufacturer of the reinforcing bar, and a standard assessment step of determining the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired manufacturer information by referring to reinforcing bar standard information which corresponds, for each reinforcing bar manufacturer, standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for that standard.

[0013] In addition, in order to solve the above problems, an image assessment method according to one embodiment of the present invention includes an image processing step of calculating the diameter of a reinforcing bar from an image of the reinforcing bar, an acquisition step of acquiring site information indicating the site where the reinforcing bar is used, and a standard assessment step of determining the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired site information, by referring to reinforcing bar standard information that corresponds, for each site where the reinforcing bar is used, standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard. Effect of the Invention

[0014] According to the present invention, the accuracy of reinforcing bar standard determination can be improved. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram showing an example of a usage mode of the image assessment device according to the first embodiment of the present invention. [Diagram 2]1 is a diagram showing a configuration of an image assessment device according to a first embodiment of the present invention. [Diagram 3] FIG. 2 is a diagram showing a configuration of reinforcing bar standard information according to the first embodiment of the present invention. [Figure 4] 4 is a flowchart showing a process of the image assessment device according to the first embodiment of the present invention. [Diagram 5] FIG. 11 is a diagram showing a configuration of an image assessment device according to a second embodiment of the present invention. [Figure 6] FIG. 11 is a diagram showing a configuration of reinforcing bar standard information according to the second embodiment of the present invention. [Figure 7] 10 is a flowchart showing a process of an image assessment device according to a second embodiment of the present invention. [Figure 8] FIG. 1 is a diagram showing the range of reinforcing bar standards according to the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] [Embodiment 1] Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

[0017] (Example of use of image assessment device 1) FIG. 1 is a schematic diagram showing an example of a usage mode of the image assessment device 1 according to this embodiment. The image assessment device 1 takes an image of a target deformed rebar, calculates the diameter of the deformed rebar (hereinafter referred to as rebar diameter) from the image, and determines the standard (also referred to as "name") from the rebar diameter. Note that a deformed rebar is a rebar that has nodes, ribs, etc., which are protrusions on the surface of the rebar. In one embodiment, the nodes are provided along a direction that intersects perpendicularly or obliquely with the axial direction of the rebar. The ribs are provided continuously along the axial direction of the rebar.

[0018] 1, the image assessment device 1 photographs a deformed reinforcing bar BA to obtain a photographed image 102, calculates the reinforcing bar diameter of the deformed reinforcing bar BA from the photographed image 102, and determines the standard from the reinforcing bar diameter. Then, the image assessment device 1 displays the photographed image 102, a calculation result 103 of the reinforcing bar diameter of the deformed reinforcing bar BA, and a determination result 104 of the reinforcing bar standard on the display unit 14.

[0019] In the example shown in Fig. 1, the image assessment device 1 operates as follows. First, the image assessment device 1 captures an image of the deformed reinforcing bar BA using the imaging units 11 and 12 provided therein. Next, the image assessment device 1 calculates the reinforcing bar diameter of the deformed reinforcing bar BA using the images captured by the imaging units 11 and 12, and determines the reinforcing bar standard. Finally, the image assessment device 1 transmits the captured images 102 captured by the imaging units 11 and 12, the calculation results 103, and the assessment results 104 to the display unit 14.

[0020] In this embodiment, a case will be described in which the image of the deformed reinforcing bar BA, the calculation of the reinforcing bar diameter of the deformed reinforcing bar BA, and the determination of the reinforcing bar standard are processed by the image determination device 1, and the captured image 102, the calculation result 103, and the determination result 104 are displayed on the display unit 14. However, one embodiment of the present invention is not limited to this, and all of these processes may be performed on the same terminal, or some of these processes may be performed on a server.

[0021] In addition, in the example shown in Figure 1, the number of deformed bars for which the rebar diameter is calculated is one, but the number of deformed bars for which the rebar diameter is calculated does not have to be one, and the rebar diameters of two or more deformed bars may be calculated simultaneously and the calculation results may be displayed.

[0022] (Configuration of image assessment device 1) 2 is a diagram showing the configuration of the image assessment device 1 according to this embodiment. The image assessment device 1 includes imaging units 11 and 12, a control unit 13, a display unit 14, an input unit 15, and a storage unit 16.

[0023] The imaging units 11 and 12 acquire images under shooting conditions such as set exposure, focus position, etc. The imaging units 11 and 12 are composed of solid-state imaging elements such as a CCD (Charge Coupled Device) sensor and a CMOS (Complementary Metal Oxide Semiconductor) sensor, lenses, etc.

[0024] The control unit 13 calculates the rebar diameter (joint length) by image processing and determines the standard from the rebar diameter. The control unit 13 may be realized by software processing using a CPU (Central Processing Unit), GPU (Graphics Processing Unit), etc., or may be realized by hardware processing using an ASIC (Application Specific Integrated Circuit), FPGA (Field Programmable Gate Array), etc.

[0025] The display unit 14 displays images acquired by the imaging units 11 and 12, calculation results, judgment results, etc. The display unit 14 is composed of, for example, a liquid crystal display, an organic EL (Electro Luminescence) display, etc. The input unit 15 inputs data into the image judgment device 1 in response to a user's operation. The input unit 15 is composed of, for example, a mouse, a keyboard, the touch panel of the display unit 14, etc. The memory unit 16 stores images, calculation results, judgment results, etc. The memory unit 16 is composed of, for example, an SSD (Solid State Drive), HDD (Hard Disk Drive), etc.

[0026] (Configuration of control unit 13) As shown in Fig. 2, the control unit 13 includes an image processing unit 131, an acquisition unit 132, and a standard determination unit 133. The image processing unit 131 calculates the diameter of a reinforcing bar from an image of the reinforcing bar. The acquisition unit 132 acquires manufacturer information indicating the manufacturer of the reinforcing bar. The standard determination unit 133 refers to reinforcing bar standard information 20 in which standard data indicating the standard of the reinforcing bar is associated with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard for each reinforcing bar manufacturer, and determines the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired manufacturer information.

[0027] (Processing of image processing unit 131) The image processing unit 131 calculates the parallax from the two images captured by the imaging units 11 and 12, and calculates three-dimensional information of the object in the image. The parallax is the amount of displacement of the object between the two images, and can be calculated by block matching or the like. In block matching, a reference window is set at a pixel of interest in a reference image, and reference windows are sequentially set in a reference image, and the similarity or difference between pixels between the reference window and the reference window is evaluated. SAD (Sum of Absolute Difference), SSD (Sum of Squared Difference), or the like is used to evaluate the pixels.

[0028] The relationship between the distance Z to the photographed subject and the parallax D is D=f×B / Z, where f is the focal length of the imaging units 11 and 12, and B is the distance between the two imaging units 11 and 12. The three-dimensional coordinates (X, Y, Z) of the subject at the distance Z at the coordinates (x, y) on the image are calculated by X=x×Z / f and Y=y×Z / f.

[0029] Here, in the image assessment device 1 of this embodiment, a method of calculating three-dimensional information from images captured by two imaging units 11 and 12 will be described, but it may also be calculated from images captured by three or more imaging units, or may be obtained by TOF (Time Of Flight).

[0030] The image processing unit 131 calculates the rebar diameter based on the captured image and the calculated three-dimensional information. There are various methods for calculating the rebar diameter, and these methods can be applied to the image assessment device 1 according to this embodiment.

[0031] The image processing unit 131, for example, detects edges from image information, performs a Hough transform on the detected edges to extract straight line information, and identifies the position of the rebar by taking into consideration the inclination, combination, etc. Then, the image processing unit 131 calculates the three-dimensional coordinates of the edges around the identified position of the rebar from the parallax, fits a three-dimensional straight line parallel to the identified axial direction of the rebar to the edges around the rebar, and calculates the distance between the two fitted three-dimensional straight lines.

[0032] (Processing of standard determination unit 133) The standard determination unit 133 determines the reinforcing bar standard from the calculated reinforcing bar diameter by referring to preset reinforcing bar standard information 20. The reinforcing bar standard information 20 may be stored in the storage unit 16, may be incorporated into a program executed by the control unit 13, or may be read from a storage device different from the storage unit 16, a server connected via a network, or the like.

[0033] Fig. 3 is a diagram showing the configuration of reinforcing bar standard information 20 according to this embodiment. As shown in Fig. 3, reinforcing bar standard information 20 includes a diameter range (reinforcing bar range data) based on the minimum and maximum diameters (minimum and maximum values ​​of reinforcing bar diameter) of reinforcing bars for each reinforcing bar standard (standard data). Here, the reinforcing bar diameter range for each reinforcing bar standard included in reinforcing bar standard information 20 is specified for each manufacturer information (Company A, Company B, etc.) indicating the reinforcing bar manufacturer. For example, as shown in Fig. 3, the relationship between reinforcing bar manufacturers and reinforcing bar standards is specified.

[0034] On the other hand, reinforcing bars used at one site may be of multiple standards, but are often made by the same reinforcing bar manufacturer. Therefore, the image assessment device 1 according to this embodiment is set in advance with the manufacturer of the reinforcing bars used at the site. In detail, the acquisition unit 132 acquires manufacturer information indicating the manufacturer of the reinforcing bars from the input unit 15, and stores the information in the storage unit 16.

[0035] The standard determination unit 133 then reads out the range of reinforcing bar diameters that matches the manufacturer information set in advance from the reinforcing bar standard information 20, and compares it with the calculated reinforcing bar diameter to determine the reinforcing bar standard. This makes it possible to improve the accuracy of reinforcing bar standard determination even if the range of reinforcing bar diameters varies depending on the reinforcing bar manufacturer.

[0036] For example, in FIG. 3, if the set rebar manufacturer is Company A, the calculated rebar diameter is DA, and A19_min < DA < A19_max, the control unit 13 determines that the rebar standard is D19 and outputs it. Specifically, the control unit 13 stores the determination result of the rebar standard in the storage unit 16 as text data stored or image data superimposed on the captured image of the rebar, or displays it on the display unit 14.

[0037] Here, in FIG. 3, an example in which all the rebar standards and the ranges of the rebar diameters of each manufacturer are defined is shown. However, if there is a non-existent rebar standard, it may not be necessary to define it. The standard determination unit 133 may use the values of similar manufacturers or the average value of all manufacturers as needed. Also, although the range of the rebar diameter is shown by the minimum diameter and the maximum diameter, it may be expressed by the central value and the width. For example, it may be defined as 50 mm ± 2 mm, 50 mm ± 4%, etc.

[0038] Furthermore, in the rebar standard information 20 for each manufacturer, the minimum diameter and the maximum diameter of adjacent rebar standards do not have to be the same value, and the intermediate value of the minimum diameter and the maximum diameter may be used as the threshold value when determining the rebar standard. For example, in the rebar standard information 20 of Company A shown in FIG. 3, A16_max and A19_min are not the same value, and it is defined that A16_max < A19_min. Then, the standard determination unit 133 compares the calculated rebar diameter with (A16_max + A19_min) / 2, and if it is smaller, determines it as D16, and if it is larger, determines it as D19. Also, the rebar standard and the range of the rebar diameter may be defined for each shape of the rebar such as ribbed bars and threaded bars.

[0039] (Processing of the Image Determination Device 1) FIG. 4 is a flowchart showing the processing of the image determination device 1 according to the present embodiment.

[0040] (Step S401) In the image determination device 1, first, the imaging units 11 and 12 capture an image of the rebar and store the data of the captured image in the memory.

[0041] (Step S402: Image processing step) Next, the image processing unit 131 calculates the rebar diameter from the captured image.

[0042] (Step S403: Acquisition step) Next, the standard determination unit 133 reads out, for example, from the storage unit 16, manufacturer information indicating a preset reinforcing bar manufacturer.

[0043] (Step S404) Then, the standard determination unit 133 reads out the reinforcing bar diameter range of the reinforcing bar standard from the reinforcing bar standard information 20 based on the manufacturer information read out in step S403.

[0044] (Step S405: Standard determination step) Next, the standard determination unit 133 determines the reinforcing bar standard by comparing the reinforcing bar diameter calculated in step S402 with the reinforcing bar diameter range read out in step S404.

[0045] (Step S406) The control unit 13 causes the display unit 14 to display the reinforcing bar diameter calculated in step S402 and the reinforcing bar standard determined in step S405.

[0046] In addition, when standard data and reinforcing bar range data are added to the reinforcing bar standard information 20, the standard determination unit 133 may preferentially refer to the added standard data and reinforcing bar range data.

[0047] In addition, standard data and reinforcing bar range data may be added to the reinforcing bar standard information 20 using the calculated reinforcing bar diameter.

[0048] As described above, the image assessment device 1 according to this embodiment specifies the range of reinforcing bar diameters for each reinforcing bar manufacturer in the reinforcing bar standard information 20 when determining the reinforcing bar standard, and determines the reinforcing bar standard by comparing the reinforcing bar diameter range of the reinforcing bar manufacturer set by the user with the calculated reinforcing bar diameter. This eliminates the influence of differences in reinforcing bar diameters between reinforcing bar manufacturers, and improves the accuracy of reinforcing bar standard determination.

[0049] [Embodiment 2] A second embodiment of the present invention will be described below. For ease of explanation, the same reference numerals will be given to members having the same functions as those described in the first embodiment, and the description thereof will not be repeated.

[0050] The image assessment device 1a according to this embodiment defines the range of reinforcing bar diameters defined in the reinforcing bar standard information 20a based on the reinforcing bars used at the construction site.

[0051] (Configuration of image assessment device 1a) 5 is a diagram showing the configuration of the image assessment device 1 according to this embodiment. The image assessment device 1a includes imaging units 11 and 12, a control unit 13a, a display unit 14, an input unit 15, and a storage unit 16.

[0052] (Configuration of control unit 13a) As shown in Fig. 5, the control unit 13a according to this embodiment includes an image processing unit 131a, an acquisition unit 132a, and a standard determination unit 133a. The image processing unit 131a calculates the diameter of the reinforcing bar from an image of the reinforcing bar. The acquisition unit 132a acquires site information indicating the site where the reinforcing bar is used. The standard determination unit 133a refers to reinforcing bar standard information 20a that associates standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard for each site where the reinforcing bar is used, and determines the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired site information.

[0053] (Processing of standard determination unit 133a) The standard determination unit 133a determines the rebar standard from the calculated rebar diameter by referring to the preset rebar standard information 20a. The rebar standard information 20a may be stored in the storage unit 16, may be incorporated in a program executed by the control unit 13a, or may be read from a storage device other than the storage unit 16, a server connected via a network, or the like.

[0054] Fig. 6 is a diagram showing the configuration of reinforcing bar standard information 20a according to this embodiment. As shown in Fig. 6, reinforcing bar standard information 20a includes a diameter range (reinforcing bar range data) based on the minimum and maximum diameters (minimum and maximum values ​​of reinforcing bar diameter) of reinforcing bars for each reinforcing bar standard (standard data). Here, the reinforcing bar diameter range for each reinforcing bar standard included in reinforcing bar standard information 20a is specified for each site information (Site E, Site F, etc.) indicating the site where the reinforcing bar is used. For example, as shown in Fig. 6, the relationship between the site and the reinforcing bar standard is specified.

[0055] The manufacturer and standard of the reinforcing bar used at the site can be determined from order information from the reinforcing bar manufacturer, design information, etc. Therefore, the reinforcing bar standard information 20a can be defined for each site where the reinforcing bar is used. The reinforcing bar standard information 20a may be defined for each construction site in a different location, or may be defined for each building, tunnel, etc. at the same construction site.

[0056] As a result, if reinforcing bar standard determination is performed at the same site, the accuracy of reinforcing bar standard determination can be improved by simply setting the reinforcing bar standard information 20a corresponding to the site information indicating the site once, without having to add reinforcing bar standards and reinforcing bar diameter ranges each time the reinforcing bar standard is determined.

[0057] The reinforcing bar standard and the range of reinforcing bar diameter for each site may be created by the department that manages the construction work, such as the head office or the branch office, or by the person in charge at the site. By sharing the created reinforcing bar standard information 20a on a server or the like, it is possible to determine the reinforcing bar standard based on the reinforcing bar standard and the range of reinforcing bar diameter for each site on multiple terminals simply by setting the site information.

[0058] This allows the rebar standard and rebar diameter range to be specified in accordance with the rebar used on-site, eliminating the effects of differences in rebar diameter between rebar manufacturers and improving the accuracy of rebar standard determination.

[0059] Here, when adding rebar standards and rebar diameter ranges to the site-specific rebar standard information 20a, only the information corresponding to the rebar standards used at the site is sufficient. For information that has not been added, values ​​from the same rebar manufacturer or the average value of the minimum and maximum diameters are used.

[0060] In addition, if the determination is whether the designed rebar standard is used, it is sufficient to determine whether rebars other than those of the standard included in the design information are used. If the designed rebar standard is not used, a notification may be given that the rebar diameter determination result is outside the standard.

[0061] Furthermore, by adding the rebar standard and rebar diameter range for each site using the calculation result of the photographed image, the user can reduce the effort of inputting the rebar standard information 20a and shorten the work time. For example, the image judgment device 1a can add the rebar standard information 20a by photographing the rebar used at the site and assigning the rebar standard to the calculation result of the rebar diameter. The rebar diameter range is added with a range preset for each rebar standard. For example, if the calculation result of the rebar diameter is 50 mm and the rebar standard is assigned as D51, the rebar diameter range corresponding to D51 is set to, for example, 50 mm ± 2 mm, 50 mm ± 4%, etc. In this case, the user may set the rebar diameter range individually.

[0062] (Processing of image assessment device 1a) FIG. 7 is a flowchart showing the process of the image assessment device 1a according to this embodiment.

[0063] (Step S701) In the image assessment device 1a, first, the imaging units 11 and 12 capture images of the reinforcing bars, and the data of the captured images is stored in a memory.

[0064] (Step S702: Image processing step) Next, the image processor 131a calculates the diameter of the reinforcing bar from the captured image.

[0065] (Step S703: Acquisition step) Next, the standard determination unit 133a reads out, for example, from the storage unit 16, site information that indicates the site where the reinforcing bar is to be used, which is set in advance.

[0066] (Step S704) Then, the standard determination unit 133a reads out the reinforcing bar diameter range of the reinforcing bar standard from the reinforcing bar standard information 20a based on the site information read out in step S703.

[0067] (Step S705: Standard determination step) Next, the standard determination unit 133 determines the reinforcing bar standard by comparing the reinforcing bar diameter calculated in step S702 with the reinforcing bar diameter range read out in step S704.

[0068] (Step S706) The control unit 13 causes the display unit 14 to display the reinforcing bar diameter calculated in step S702 and the reinforcing bar standard determined in step S705.

[0069] When standard data and reinforcing bar range data are added to the reinforcing bar standard information 20a, the standard determination unit 133a may preferentially refer to the added standard data and reinforcing bar range data.

[0070] In addition, the calculated diameter of the reinforcing bar may be used to add standard data and reinforcing bar range data to the reinforcing bar standard information 20a.

[0071] As described above, the image assessment device 1a of this embodiment determines reinforcing bar standards using the reinforcing bar standards and reinforcing bar diameter ranges specified for each construction site, thereby improving the accuracy of reinforcing bar standard determination.

[0072] 〔summary〕 The image assessment device according to aspect 1 of the present invention includes an image processing unit that calculates the diameter of a reinforcing bar from an image of the reinforcing bar, an acquisition unit that acquires manufacturer information indicating the manufacturer of the reinforcing bar, and a standard assessment unit that determines the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired manufacturer information by referring to reinforcing bar standard information that associates, for each reinforcing bar manufacturer, standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard.

[0073] The image assessment device according to aspect 2 of the present invention includes an image processing unit that calculates the diameter of the reinforcing bar from an image of the reinforcing bar, an acquisition unit that acquires site information indicating the site where the reinforcing bar is used, and a standard assessment unit that determines the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired site information, by referring to reinforcing bar standard information that associates standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard, for each site where the reinforcing bar is used.

[0074] In the image assessment device of aspect 3 of the present invention, in aspect 1 or 2 above, when the standard data and the reinforcing bar range data are added to the reinforcing bar standard information, the standard assessment unit may preferentially refer to the added standard data and reinforcing bar range data. 3. The image assessment device according to claim 1 or 2.

[0075] The image assessment device according to a fourth aspect of the present invention may be configured in such a way that, in the first or second aspect, the calculated diameter of the reinforcing bar is used to add the specification data and the reinforcing bar range data to the reinforcing bar specification information.

[0076] The image assessment method according to aspect 5 of the present invention includes an image processing step of calculating the diameter of the reinforcing bar from an image of the reinforcing bar, an acquisition step of acquiring manufacturer information indicating the manufacturer of the reinforcing bar, and a standard assessment step of determining the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired manufacturer information by referring to reinforcing bar standard information which corresponds, for each reinforcing bar manufacturer, standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard.

[0077] The image assessment method according to aspect 6 of the present invention includes an image processing step of calculating the diameter of the reinforcing bar from an image of the reinforcing bar, an acquisition step of acquiring site information indicating the site where the reinforcing bar is used, and a standard assessment step of determining the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired site information, by referring to reinforcing bar standard information which corresponds, for each site where the reinforcing bar is used, standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard.

[0078] The image assessment device relating to each aspect of the present invention may be realized by a computer. In this case, the control program of the image assessment device that realizes the image assessment device in a computer by operating the computer as each part (software element) of the image assessment device, and the computer-readable recording medium on which it is recorded, also fall within the scope of the present invention.

[0079] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Furthermore, new technical features can be formed by combining the technical means disclosed in the respective embodiments. [Explanation of symbols]

[0080] 1, 1a Image judgment device 11, 12 Imaging unit 13, 13a Control section 14 Display section 15 Input section 16 Memory section 20, 20a Rebar Standard Information 131, 131a Image processing unit 132, 132a acquisition part 133, 133a Standard judgment section

Claims

1. an image processing unit that calculates the diameter of the reinforcing bar from an image of the reinforcing bar; An acquisition unit that acquires manufacturer information indicating a manufacturer of the reinforcing bar; a standard determination unit that determines the standard of the reinforcing bar based on the calculated diameter of the reinforcing bar and the acquired manufacturer information by referring to reinforcing bar standard information that associates standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters of the standard for each reinforcing bar manufacturer; An image assessment device comprising:

2. an image processing unit that calculates the diameter of the reinforcing bar from an image of the reinforcing bar; An acquisition unit that acquires site information indicating a site where the reinforcing bar is used; a standard determination unit that determines the standard of the reinforcing bar based on the calculated diameter of the reinforcing bar and the acquired site information by referring to reinforcing bar standard information that associates standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard for each site where the reinforcing bar is used; An image assessment device comprising:

3. When the standard data and the reinforcing bar range data are added to the reinforcing bar standard information, The standard determination unit preferentially refers to the added standard data and the reinforcing bar range data.

3. The image assessment device according to claim 1 or 2.

4. The reinforcing bar standard data and the reinforcing bar range data are added to the reinforcing bar standard information using the calculated reinforcing bar diameter.

3. The image assessment device according to claim 1 or 2.

5. An image processing step of calculating a diameter of the reinforcing bar from an image of the reinforcing bar; An acquisition step of acquiring manufacturer information indicating a manufacturer of the reinforcing bar; a standard determination step of determining the standard of the reinforcing bar from the calculated diameter of the reinforcing bar and the acquired manufacturer information by referring to reinforcing bar standard information in which standard data indicating the standard of the reinforcing bar and reinforcing bar range data indicating the range of reinforcing bar diameters of the standard are associated with each other for each reinforcing bar manufacturer; An image assessment method using an image assessment device, comprising:

6. An image processing step of calculating a diameter of the reinforcing bar from an image of the reinforcing bar; An acquisition step of acquiring site information indicating a site where the reinforcing bar is used; a standard determination step of determining the standard of the reinforcing bar based on the calculated diameter of the reinforcing bar and the acquired site information by referring to reinforcing bar standard information that associates standard data indicating the standard of the reinforcing bar with reinforcing bar range data indicating the range of reinforcing bar diameters for the standard for each site where the reinforcing bar is used; An image assessment method using an image assessment device, comprising:

7. An image judgment program for causing a computer to function as the image judgment device described in any one of claims 1 to 4, comprising the image processing unit, the acquisition unit, and the standard judgment unit.

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