Evaluation method, evaluation device, evaluation system, and evaluation program

Abstract

To provide a novel technique for evaluating a visual impression or a wrinkle generation risk of a face on the basis of a skin image of a region where. no obvious wrinkles exist.SOLUTION: A device for evaluating the visual impression of a face comprises: acquisition means which acquires a plurality of parameters calculated from a skin image of a region where no obvious wrinkles exist, in a user's face; and evaluation means which on the basis of the parameters, evaluates a visual impression of the use's face. The parameters include at least two of a parameter indicating anisotropy of a skin groove, a parameter concerning a length of the skin groove, and a parameter indicating irregularity of lateral widths of the skin grooves.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for evaluating a facial appearance, a method for evaluating a risk of wrinkle formation, a device for evaluating a facial appearance, a device for evaluating the risk of wrinkle formation, a system for evaluating a facial appearance, a system for evaluating the risk of wrinkle formation, a program for evaluating the facial appearance, and a program for evaluating the risk of wrinkle formation. [Background technology]

[0002] 2. Description of the Related Art In skin evaluation, techniques for performing various analyses and evaluations using indices related to wrinkles have been conventionally known.

[0003] For example, Patent Document 1 discloses a technique for analyzing wrinkle conditions using the directionality, length, depth, and the like of linear components of the skin surface.

[0004] Furthermore, Patent Document 2 discloses a technique for evaluating the progression of wrinkles using the area, number, length, area ratio, width, depth, and the like of wrinkles. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-62569 A [Patent Document 2] JP 2013-069122 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, all of the above techniques evaluate wrinkles that are clearly observed at the time of evaluation, and are not capable of evaluating the overall impression of the face or the risk of developing wrinkles in the future.

[0007] In view of the current situation described above, an objective of the present invention is to provide a novel technology for evaluating the appearance of a face or the risk of developing wrinkles based on skin images of areas where no obvious wrinkles are present. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a method for evaluating a facial appearance, comprising: an acquisition step of acquiring a plurality of parameters calculated from a skin image of a non-wrinkle-present area of ​​a user's face where no obvious wrinkles are present; and an evaluation step of evaluating the facial appearance of the user based on the plurality of parameters, wherein the plurality of parameters include at least two of a parameter representing the anisotropy of a skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the lateral width of the skin groove.

[0009] With this configuration, the appearance impression of the face can be evaluated based on skin images of non-wrinkle-manifest areas where no obvious wrinkles exist.

[0010] In order to solve the above problems, the present invention provides a method for evaluating the risk of future wrinkle development on a user's face, comprising: an acquisition step of acquiring a plurality of parameters calculated from a skin image of a non-wrinkle-manifest area of ​​the user's face where no obvious wrinkles are present; and an evaluation step of evaluating the risk of future wrinkle development on the user's face based on the plurality of parameters, wherein the plurality of parameters include at least two of a parameter representing the anisotropy of a skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the lateral width of the skin groove.

[0011] With this configuration, it is possible to evaluate the risk of future wrinkle development based on skin images of areas where wrinkles are not apparent.

[0012] In order to solve the above problems, the present invention provides a facial appearance evaluation device, which includes an acquisition means for acquiring a plurality of parameters calculated from skin images of non-wrinkle manifestation areas of a user's face where no obvious wrinkles are present, and an evaluation means for evaluating the facial appearance of the user based on the plurality of parameters, wherein the plurality of parameters include at least two of a parameter representing the anisotropy of the skin grooves, a parameter relating to the length of the skin grooves, and a parameter representing the variation in the lateral width of the skin grooves.

[0013] In order to solve the above problems, the present invention provides an apparatus for evaluating the risk of future wrinkle development on a user's face, comprising: an acquisition means for acquiring a plurality of parameters calculated from skin images of non-wrinkle manifestation areas of the user's face where no obvious wrinkles are present; and an evaluation means for evaluating the risk of future wrinkle development on the user's face based on the plurality of parameters, wherein the plurality of parameters include at least two of a parameter representing the anisotropy of skin grooves, a parameter relating to the length of skin grooves, and a parameter representing the variation in lateral width of skin grooves.

[0014] In order to solve the above problems, the present invention provides a facial appearance evaluation program which causes a computer to function as an acquisition means for acquiring a plurality of parameters calculated from skin images of non-wrinkle-present areas of a user's face where no obvious wrinkles are present, and an evaluation means for evaluating the facial appearance of the user based on the plurality of parameters, the plurality of parameters including at least two of a parameter representing the anisotropy of the skin grooves, a parameter relating to the length of the skin grooves, and a parameter representing the variation in the lateral width of the skin grooves.

[0015] In order to solve the above problems, the present invention provides a program for evaluating the risk of future wrinkles on a user's face, which causes a computer to function as an acquisition means for acquiring a plurality of parameters calculated from skin images of non-wrinkle-present areas of the user's face where no obvious wrinkles are present, and an evaluation means for evaluating the risk of future wrinkles on the user's face based on the plurality of parameters, wherein the plurality of parameters include at least two of a parameter representing the anisotropy of skin grooves, a parameter relating to the length of skin grooves, and a parameter representing the variation in lateral width of skin grooves.

[0016] In a preferred embodiment of the present invention, the facial appearance impression is a sagging appearance of the face.

[0017] With this configuration, the feeling of facial withering can be evaluated using skin images of areas where wrinkles are not evident.

[0018] In a preferred embodiment of the present invention, the skin image is a skin image of the cheek and / or mouth of the user.

[0019] In a preferred embodiment of the present invention, the acquisition step acquires a plurality of the parameters calculated from skin images of the cheeks and mouth, areas where wrinkles are not apparent, and the evaluation step evaluates the appearance of the user's face based on an evaluation based on the parameters calculated from the skin images of the cheeks and an evaluation based on the parameters calculated from the skin images of the mouth.

[0020] With this configuration, evaluation can be performed from skin images of multiple areas, which is expected to improve evaluation accuracy.

[0021] In a preferred embodiment of the present invention, the obtaining step obtains a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the lateral width of the skin groove, and the evaluating step evaluates the appearance impression of the user's face based on each parameter in the following order of priority: the parameter representing the anisotropy of the skin groove, the parameter relating to the length of the skin groove, and the parameter representing the variation in the lateral width of the skin groove.

[0022] In a preferred embodiment of the present invention, the parameters relating to the length of the skin furrows include the number of long skin furrows and / or the number of short skin furrows.

[0023] In a preferred embodiment of the present invention, the evaluation step further includes evaluating a risk of future wrinkle development on the user's face based on an appearance impression of the user's face.

[0024] In a preferred embodiment of the present invention, an evaluation system includes an evaluation device and a terminal device, the terminal device including an imaging means for imaging a user's face and transmitting the skin image to the evaluation device, and an output means for outputting an evaluation result by the evaluation means. Effect of the Invention

[0025] According to the present invention, it is possible to provide a novel technique for evaluating the appearance impression of a face or the risk of developing wrinkles based on skin images of areas where no obvious wrinkles are present. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a diagram showing a configuration of an evaluation system according to an embodiment of the present invention. [Diagram 2] 1 is a flowchart showing the procedure of an evaluation method according to an embodiment of the present invention. [Diagram 3] 4 is a flowchart showing a procedure for evaluating a wilting feeling in the evaluation step according to the embodiment of the present invention. [Figure 4] 1 is a flowchart showing a procedure for evaluating a wrinkle occurrence risk in an evaluation step according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] <Embodiment 1> The present invention relates to a technique for evaluating the appearance impression of a face or the risk of future wrinkle development on the face. The appearance impression of a face in the present invention is an overall impression of the appearance of the face, and in this embodiment, it is a droopy feeling of the face. The "overall impression" means an overall impression, not an impression limited to a specific part. However, it does not mean that the appearance impression of a face, including a droopy feeling, is always an impression evaluated by visually checking the entire face, but includes an impression of the entire face when a certain area of ​​the face is viewed, such as a profile, the upper or lower half of the face, or the area excluding the forehead.

[0028] Here, the wilted feeling is a facial impression, and refers to a wilted, deflated, or shriveled impression. As a result of intensive research, the present inventors have found that it is possible to evaluate facial impressions, including such wilted feeling, using at least two of the parameters representing the anisotropy of the skin grooves, the parameters relating to the length of the skin grooves, and the parameters representing the variation in the width of the skin grooves in non-wrinkle-prone areas. The present invention is based on such new findings.

[0029] The evaluation device and evaluation system of the present invention will be described below with reference to the drawings. Note that the embodiment shown below is an example of the present invention, and the present invention is not limited to the embodiment below, and various configurations can be adopted.

[0030] For example, the configuration, operation, etc. of the evaluation device and evaluation system are described in this embodiment, but a method, computer program, etc. with a similar configuration can also achieve the same effects. In addition, the program may be stored in a non-transient recording medium readable by a computer, or may be provided so as to be downloadable from an external server. For example, by installing the program in a computer, the device according to the present invention can be realized, and the method according to the present invention can be executed by the computer.

[0031] 1 is a diagram showing the configuration of a system according to this embodiment. In the system according to this embodiment, an evaluation device 1 and a terminal device 2 are configured to be able to communicate with each other via a network NW. The evaluation device 1 includes each means described below, and evaluates the appearance impression of the face and / or the risk of wrinkle development. The terminal device 2 obtains and outputs the evaluation results by the evaluation device 1, thereby providing information to the user.

[0032] As the network NW, an IP (Internet Protocol) network can be typically used, but there is no restriction on the type of communication protocol, and furthermore, there is no restriction on the type and scale of the network.

[0033] The evaluation device 1 may be a general computer device such as a server device that is equipped with an arithmetic unit such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit), a main memory device such as a RAM (Random Access Memory), an auxiliary memory device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a flash memory, and various input / output devices including a means for connecting to a network NW.

[0034] As the terminal device 2, any computer device such as a PC (Personal Computer) equipped with various input / output devices including a calculation device, a storage device, and a means for connecting to the network NW can be used. Alternatively, a smartphone or a tablet terminal may be used as the terminal device 2. A dedicated application for inputting and transmitting various information to and from the evaluation device 1, a browser application for accessing a dedicated web page, and the like are stored in the storage device, and the calculation device executes various processes, so that any computer device functions as the terminal device 2 of the present invention.

[0035] The evaluation device 1 includes a calculation means 11, an acquisition means 12, and an evaluation means 13. Note that these means do not necessarily need to be included in a single computer, and a configuration in which a plurality of computers work together to function as the evaluation device 1 according to the present invention may be used.

[0036] The calculation means 11 acquires a skin image of a non-wrinkle-present area, which is an area of ​​the user's face where no obvious wrinkles exist. The skin image is transmitted from the terminal device 2, for example, and the calculation means 11 acquires the skin image via the network NW.

[0037] In this embodiment, the terminal device 2 captures images of the user's cheeks and mouth, where wrinkles are not evident, and the calculation means 11 acquires the images as skin images. Although it is preferable to acquire a plurality of skin images of the non-wrinkle evident areas in this manner, the calculation means 11 may acquire, for example, a skin image of either the cheeks or the mouth.

[0038] The calculation means 11 then calculates a plurality of parameters from the acquired skin image. The plurality of parameters are preferably parameters related to the cuticle grooves, and include at least two of a parameter representing the anisotropy of the cuticle grooves, a parameter relating to the length of the cuticle grooves, and a parameter representing the variation in the width of the cuticle grooves.

[0039] The calculation means 11 of this embodiment calculates three parameters: a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the width of the skin groove.

[0040] The acquiring means 12 acquires the plurality of parameters calculated by the calculating means 11. Here, the calculating means 11 may be provided in an external computer different from the evaluation device 1.

[0041] The evaluation means 13 performs evaluation based on the multiple parameters acquired by the acquisition means 12. The evaluation means 13 of this embodiment uses the above-mentioned three parameters to evaluate the withered feeling of the user's face. The details of the evaluation will be described later.

[0042] The terminal device 2 also includes an image capturing means 21 and an output means 22. These means do not necessarily need to be included in a single computer, and may be configured such that a plurality of computers work together to function as the terminal device 2 according to the present invention.

[0043] The photographing means 21 receives an operation from a user, photographs a skin image of a non-wrinkle-obvious part of the user's face, and transmits the skin image to the calculation means 11 in response to an instruction from the user.

[0044] The output means 22 outputs the evaluation result received from the evaluation device 1. The output format is not particularly limited, but for example, the evaluation result can be shown to the user by displaying it on a display or the like.

[0045] Next, the evaluation method according to the present embodiment will be described with reference to Fig. 2 and Fig. 3. Fig. 2 is a flowchart showing an outline of the evaluation method according to the present embodiment. Note that in this embodiment, each procedure is executed by the evaluation device 1 and the terminal device 2, but some procedures may be executed without using a computer.

[0046] First, in step S11, the calculation means 11 acquires skin images of non-wrinkle visible areas from the terminal device 2. In this embodiment, as described above, skin images of non-wrinkle visible areas of the cheeks and mouth are acquired. Skin images of other non-wrinkle visible areas of the face may also be acquired.

[0047] Next, in step S12, the calculation means 11 calculates various parameters for each of the acquired skin images. The parameter calculation can be performed by any known method. For example, the parameter calculation may be performed after performing any image processing such as normalization of the position or size of the skin image or binarization.

[0048] In the present invention, in order to calculate the parameters related to the skin grooves, it is assumed that, for example, image processing is performed to emphasize linear components, and the skin grooves are extracted. Then, various parameters are calculated based on the extracted skin grooves. Specifically, a parameter representing the anisotropy of the skin grooves is calculated from the orientation of multiple skin grooves, the number of long skin grooves and the number of short skin grooves are calculated as parameters related to the skin groove lengths according to the length of the skin grooves, and a parameter representing the variation is calculated from the width of each skin groove. It is assumed that the length of the skin grooves is divided into long and short ones, for example, by comparing with a predetermined standard.

[0049] Then, in step S13, the evaluation means 13 evaluates the droopiness of the user's face. Specifically, the evaluation is performed based on the above-mentioned three parameters and by integrating these. For example, it is assumed that each of the three parameters is ranked, and the overall evaluation is determined by combining them. Details will be described later.

[0050] Once the evaluation of the wilting sensation of the user's face has been determined, the process proceeds to step S14, where the evaluation result is output. Specifically, the communication unit of the evaluation device 1 transmits the evaluation result to the terminal device 2 via the network NW, and the output means 22 of the terminal device 2 outputs based on the evaluation result. The output may be performed by any method, but it is assumed that the output is performed, for example, by displaying a total wilting score (described later) on a display unit such as a display as the output means 22. This allows the user to check the evaluation result.

[0051] Next, the evaluation process in step S13 will be described in detail. Fig. 3 is a flowchart showing the procedure for evaluating the withering sensation in this embodiment. Here, steps S21 and S22 are executed for each part (each skin image), and in step S23, the process is repeated until the score determination for the skin images of all parts is completed, thereby determining the part score for each part.

[0052] First, in step S21, the evaluation means 13 determines a score expressed in multiple stages for each of the above-mentioned parameters. For example, multiple reference values ​​can be set for each parameter, and the score can be determined based on the values. In this embodiment, the anisotropy score is determined from a parameter representing the anisotropy of the skin grooves, the length score is determined from the number of long skin grooves and the number of short skin grooves, and the width variation score is determined from a parameter representing the variation in the width of the skin grooves. As for the length score, it is preferable to determine a score for each of the number of long skin grooves and the number of short skin grooves, and further determine the length score based on a combination of the scores.

[0053] Next, in step S22, a part score for each face part (each skin image) is determined based on the three scores determined in step S21. The part score is determined by combining the above three scores based on a preset priority order. In this embodiment, the priority order is set in the following order: a parameter representing the anisotropy of the skin grooves, a parameter relating to the length of the skin grooves, and a parameter representing the variation in the width of the skin grooves.

[0054] Then, in step S23, the evaluation means 13 determines a total wilting score by combining the site scores for each site (skin image). In calculating the total score based on each site score, multiple site scores can be used in any manner, such as the average value, minimum value, or maximum value of each site score.

[0055] As described above, the withering feeling of the user's entire face can be evaluated by determining an overall withering score as the withering feeling of the user based on a plurality of skin images.

[0056] <Embodiment 2> Next, another embodiment will be described. Note that the same components as those in the first embodiment are denoted by the same reference numerals and will not be described. The following describes the differences from the first embodiment. In the second embodiment, the risk of future wrinkles on the user's face is evaluated.

[0057] As already mentioned, the inventors' research has revealed that the feeling of facial withering can be evaluated based on at least two of parameters related to the cuticle grooves obtained from skin images of non-wrinkle-prone areas of the face, in particular a parameter expressing the anisotropy of the cuticle grooves, a parameter expressing the length of the cuticle grooves, and a parameter expressing the variation in the lateral width of the cuticle grooves.

[0058] It has been known for some time that the disturbance of the skin grooves related to the above parameters is caused by dry skin. For example, it is known that dry skin causes the skin grooves to have a certain directionality (Special feature on the function and characteristics of the skin and physical measurements, "The science of beautiful skin and cosmetics", Takahashi Motoji, Surface Science Vol. 35, No. 1, pp. 4-10, 2014). In addition, a relationship between dry skin and the thickness of the skin grooves has been suggested based on the relationship with the transepidermal water loss (TEWL) and the measurement time (Reference: "Development of a method for analyzing the surface morphology of the skin using a video microscope and an investigation of the actual state of skin texture and pores", Arakawa Naomi, Onishi Hiroyuki, Masuda Yuji, J. Soc. Cosmet. Chem. Jpn., Report 41 (3), pp. 173-180, 2007). In addition, it is speculated that the cause of the disturbance of the skin grooves is a decrease in the viscoelasticity of the skin due to a disturbance in the collagen fiber bundle structure of the dermis, and a decrease in the flexibility of the skin.

[0059] On the other hand, it is known that one of the causes of wrinkles on the skin is the loss of flexibility of the epidermis due to drying of the stratum corneum, etc. ("Wrinkle formation mechanism and anti-wrinkle products", Yang Ik-hsin, Journal of the Japanese Society of Cosmetic Science, Vol. 43, No. 2, pp. 113-118, 2019). It is also known that the viscoelasticity of the skin decreases due to the disruption of the dermal collagen fiber bundle structure, which causes wrinkles ("Efficacy evaluation and skin measurement", Takahashi Motoji, Publishing Jiho, 2016).

[0060] As mentioned above, the decrease in the flexibility of the epidermis and the decrease in viscoelasticity due to the disturbance of the collagen fiber bundle structure in the dermis are considered to have a large effect on the skin surface morphology, including wrinkles as well as skin grooves. In this relationship, the feeling of withering is an impression that is unrelated to actual wrinkles, but can also be considered as an impression of the pre-wrinkle stage, that is, the risk of future wrinkles appearing.

[0061] Therefore, it is possible to evaluate the risk of future wrinkle development from the wilting sensation. Furthermore, the risk of future wrinkle development on the face can also be directly evaluated from the parameters related to the skin grooves used in evaluating the wilting sensation. Therefore, the present invention relates to a method, device, system, and program for evaluating the appearance impression of the face, as well as a method, device, system, and program for evaluating the risk of future wrinkle development on the face.

[0062] This makes it possible to easily evaluate the risk of wrinkles using parameters obtained from skin images, even in cases where it is difficult to directly analyze factors such as the dryness of the user's environment, which is a factor in wrinkles.

[0063] The second embodiment is different from the first embodiment in that the evaluation means 13 evaluates the risk of future wrinkles on the user's face using the above-mentioned three parameters. Note that the evaluation may be performed on both the sagging feeling of the user's face and the risk of future wrinkles on the user's face.

[0064] The evaluation can be performed in the same manner as the evaluation of wilting sensation in Fig. 2 described in embodiment 1. The details of the evaluation process in step S13 are partially different from the procedure for evaluating wilting sensation, so the evaluation process in step S13 in this embodiment will be described below. Fig. 4 is a flowchart showing the procedure for evaluating the risk of wrinkle formation.

[0065] Steps S31 and S32 are the same as steps S21 and S22 in the procedure for evaluating the withering sensation shown in Fig. 3. Then, in step S33, the evaluation means 13 determines the risk of wrinkle formation based on the multiple site scores. In determining the risk of wrinkle formation based on each site score, similar to the evaluation of the withering sensation, multiple site scores can be used in any manner, such as the average value, minimum value, or maximum value of each site score.

[0066] Since both the total wilting score and the wrinkle risk are evaluated based on similar parameters, in the evaluation of the wrinkle risk, an evaluation based on the total wilting score may be performed in step S33 instead of the above process. By storing the relationship between the total wilting score calculated in step S23 and the wrinkle risk in the storage unit of the evaluation device 1 in advance, the user's wrinkle risk can be evaluated from the total wilting score based on this.

[0067] In this manner, the risk of future wrinkle development on the user's face is evaluated, and the evaluation result can be shown to the user by outputting the evaluation result on the terminal device 2. Note that the first and second embodiments may be combined to evaluate both the appearance impression of the user's face, represented by a shriveled look, and the risk of future wrinkle development on the user's face, and both evaluation results may be output.

[0068] <Example> Hereinafter, an experiment for verifying the accuracy of the method for evaluating the withering sensation according to the embodiment of the present invention, which was conducted by the present inventors, will be described. Note that the present invention is not limited to the following embodiment.

[0069] (1) Subjects The subjects were 83 men and women, and the evaluation of the withering feeling was carried out by the evaluation method of the present invention and by visual evaluation of the withering feeling. The subjects were set in a wide range of age groups without any restrictions.

[0070] (2) Evaluation based on skin image parameters The wilting sensation was evaluated according to the procedure shown in Figure 2 and Figure 3(a). Skin images were taken of the subjects' cheeks and mouths, where wrinkles were not evident. The skin images were adjusted so that the areas of the skin images were the same for each subject.

[0071] Next, using the above-mentioned method, a parameter representing the anisotropy of the skin grooves, a parameter representing the number of long skin grooves and the number of short skin grooves, and a parameter representing the variation in the width of the skin grooves were calculated from each skin image. Furthermore, an anisotropy score was determined from the parameter representing the anisotropy of the skin grooves, a length score was determined from the number of long skin grooves and the number of short skin grooves, and a width variation score was determined from the parameter representing the variation in the width of the skin grooves. Regarding the length score, a score was determined for each of the number of long skin grooves and the number of short skin grooves, and a length score was determined based on the combination of the scores.

[0072] A site score was then determined for each site from the above three scores, and a total wilting score was determined based on the site scores for the cheeks and mouth. The total wilting score was classified into five levels (1 to 5) based on pre-established criteria.

[0073] (3) Visual evaluation The same subjects as in (2) were visually evaluated for the feeling of withering. The visual evaluation was performed by three expert evaluators for each of the subjects. The visual evaluation was performed by showing the images of the subject and the left side of the subject's cheek on a display to the expert evaluators, who checked the images and rated the feeling of withering on a five-point scale from 1 to 5. The expert evaluators evaluated the feeling of withering of the subject's face by comparing it with a standard image prepared in advance. The evaluation results by the three expert evaluators were then averaged for each subject, and the value converted to the nearest value between 1 and 5 so that the result was an integer was used as the feeling of withering for that subject.

[0074] (4) Results The five-level classification of the total wilting score according to (2) was compared with the five-level evaluation according to (3), and the agreement rate was calculated. The subjects were divided into groups according to the five-level evaluation according to the visual evaluation in (3), and the agreement rate between the classification according to the evaluation method in (2) and the five-level evaluation according to the visual evaluation in (3) was calculated for each group of subjects for each evaluation. The agreement rate was 65% or more for all evaluations from 1 to 5. This indicates that the evaluation method according to the present invention may enable an evaluation close to the impression given by the whole face by visual observation from skin images of non-wrinkle-prone areas. [Explanation of symbols]

[0075] 1: Evaluation device 11: Calculation method 12: Acquisition method 13: Evaluation methods 2: Terminal device 21: Shooting method 22: Output method NW: Network

Claims

1. A method for evaluating a facial appearance impression, comprising: An acquisition step of acquiring a plurality of parameters calculated from a skin image of a wrinkle-free area of ​​a user's face, the wrinkle-free area being an area where no obvious wrinkles are present; and an evaluation step of evaluating an appearance impression of the user's face based on a plurality of the parameters, The evaluation method, wherein the plurality of parameters include at least two of a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the lateral width of the skin groove.

2. The method according to claim 1 , wherein the facial appearance impression is a feeling of facial withering.

3. The evaluation method according to claim 1 , wherein the skin image is a skin image of the cheek and / or mouth of the user.

4. In the obtaining step, the parameters are obtained by calculating skin images of areas of the cheeks and mouth where wrinkles are not apparent, The evaluation method according to claim 3 , wherein the evaluation step evaluates an appearance impression of the user's face based on an evaluation based on parameters calculated from the skin image of the cheeks and an evaluation based on parameters calculated from the skin image of the mouth.

5. In the obtaining step, a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the width of the skin groove are obtained; 2. The evaluation method according to claim 1, wherein the evaluation step evaluates the appearance impression of the user's face based on each parameter in the following order of priority: a parameter representing the anisotropy of the skin grooves, a parameter relating to the length of the skin grooves, and a parameter representing the variation in the width of the skin grooves.

6. The evaluation method according to claim 1 , wherein the parameters relating to the length of the skin furrows include the number of long skin furrows and / or the number of short skin furrows.

7. The evaluation method according to claim 1 , wherein the evaluation step further comprises evaluating a risk of future wrinkle development on the user's face based on an appearance impression of the user's face.

8. 1. A method for assessing a user's risk of future wrinkle development on the face, comprising: An acquisition step of acquiring a plurality of parameters calculated from a skin image of a non-wrinkle manifestation part of the user's face, which is a part where no obvious wrinkles are present; and evaluating a future risk of wrinkle development on the user's face based on a plurality of the parameters, The evaluation method, wherein the plurality of parameters include at least two of a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the lateral width of the skin groove.

9. The evaluation method according to claim 8 , wherein the skin image is a skin image of the cheek and / or mouth of the user.

10. In the obtaining step, a plurality of parameters are obtained, the parameters being calculated from skin images of the cheeks and the mouth as the wrinkle-non-manifested regions; The evaluation method according to claim 9, wherein the evaluation step evaluates a risk of future wrinkle development on the user's face based on an evaluation based on parameters calculated from the skin image of the cheeks and an evaluation based on parameters calculated from the skin image of the mouth.

11. The evaluation method according to claim 8 , wherein the evaluation step evaluates a risk of future wrinkle development on the user's face.

12. In the obtaining step, a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the width of the skin groove are obtained; The evaluation method according to claim 8, wherein the evaluation step evaluates the risk of future wrinkle development on the user's face based on each parameter in the following order of priority: a parameter representing anisotropy of the skin grooves, a parameter relating to the length of the skin grooves, and a parameter representing variation in the lateral width of the skin grooves.

13. The evaluation method according to claim 8 , wherein the parameters relating to the length of the skin furrows include the number of long skin furrows and / or the number of short skin furrows.

14. A facial appearance impression evaluation device, An acquisition means for acquiring a plurality of parameters calculated from a skin image of a non-wrinkle manifestation part of a user's face, which is a part where no obvious wrinkles are present; and an evaluation means for evaluating an appearance impression of the user's face based on a plurality of the parameters, The plurality of parameters include at least two of a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the lateral width of the skin groove.

15. An apparatus for evaluating a risk of future wrinkle development on a user's face, comprising: An acquisition means for acquiring a plurality of parameters calculated from a skin image of a non-wrinkle manifestation part of the user's face, which is a part where no obvious wrinkles are present; and an evaluation means for evaluating a future risk of wrinkles occurring on the user's face based on a plurality of the parameters; The plurality of parameters include at least two of a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the lateral width of the skin groove.

16. An evaluation system comprising the evaluation device according to claim 14 or 15 and a terminal device, The terminal device An imaging means for imaging a face of a user and transmitting the skin image to the evaluation device; An evaluation system comprising: an output unit that outputs an evaluation result by the evaluation unit.

17. A facial appearance impression evaluation program, An acquisition means for acquiring a plurality of parameters calculated from a skin image of a non-wrinkle manifestation part of a user's face, which is a part where no obvious wrinkles are present; and causing the computer to function as an evaluation means for evaluating an appearance impression of the user's face based on a plurality of the parameters; The plurality of parameters include at least two of a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the lateral width of the skin groove.

18. A program for evaluating a risk of future wrinkle development on a user's face, comprising: An acquisition means for acquiring a plurality of parameters calculated from a skin image of a non-wrinkle manifestation part of the user's face, which is a part where no obvious wrinkles are present; and causing the computer to function as an evaluation means for evaluating a future risk of wrinkle development in the user's face based on the plurality of parameters; The plurality of parameters include at least two of a parameter representing the anisotropy of the skin groove, a parameter relating to the length of the skin groove, and a parameter representing the variation in the lateral width of the skin groove.

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