JP4327347B2 - Mascara usability evaluation method and mascara usability evaluation apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mascara usability evaluation method and a mascara usability evaluation apparatus, and more particularly to a mascara usability evaluation method and a mascara usability evaluation apparatus for quantitatively evaluating mascara usability.
[0002]
[Prior art]
In general, mascara is widely used as a cosmetic product for making the eyelashes beautiful and long. Moreover, it is known that the state of eyelashes when using mascara changes according to the characteristics of the eyelashes. Therefore, knowing how mascara's usability changes according to the characteristics of the eyelashes is important in developing mascara and counseling customers in stores. For this reason, the usability of mascara has been conventionally evaluated.
[0003]
Conventionally, as a method for evaluating the usability of mascara, a method of performing evaluation by a person has been generally employed. In other words, the person who performs the evaluation is selected in advance (hereinafter, this person is referred to as a panel), and the mascara to be evaluated is actually used on this panel, and the usability of the mascara at that time is evaluated on the panel. The method of getting them was taken. This evaluation method is called sensory evaluation.
[0004]
In this sensory evaluation, the evaluation of mascara usability is evaluated for each item such as the content of the contents, curl, long rush, and finish. Here, the content of the content means the amount of mascara applied to the eyelashes. Curling refers to the curled state of the eyelash after applying mascara. Long rush refers to the degree to which eyelashes appear long after applying mascara. Furthermore, the finish refers to the degree of whether the eyelashes are finished in a desired state after applying mascara.
[0005]
And in the above sensory evaluation, the five-level evaluation of “very good, good, normal, bad, very bad” or “very good, good, good, normal, somewhat bad, bad, very bad” The mascara usability was evaluated based on a seven-step evaluation.
[0006]
[Problems to be solved by the invention]
However, the conventional mascara usability evaluation method based on sensory evaluation described above has the following problems.
[0007]
(1) Evaluation results will vary depending on panel preferences.
[0008]
{Circle around (2)} If the difference is fine in the five-step evaluation or the seven-step evaluation, the difference cannot be grasped.
[0009]
(3) Since the evaluation is not quantitative, it is impossible to express clearly how much each evaluation difference is.
[0010]
(4) Since the evaluation contents are abstract, it is difficult to grasp specific improvements at the time of mascara development.
[0011]
(5) If the panel is not experienced, the evaluation criteria will not be determined and the evaluation accuracy will be reduced. It is also difficult to secure an experienced panel.
[0012]
(6) Since the evaluation result by sensory evaluation is unstable, there is a possibility that the mascara desired by the customer cannot be properly selected when counseling the mascara to the customer at the store.
[0013]
(7) Terms used for evaluation are unclear, and it is difficult for general consumers to understand even if the evaluation results are displayed.
[0014]
(8) Since the usability evaluation of mascara is unclear, it cannot be applied to the development of mascara.
[0015]
The present invention has been made in view of the above points, and an object of the present invention is to provide a mascara usability evaluation method capable of quantitatively and accurately evaluating mascara usability.
[0016]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention is characterized by the following measures.
[0017]
  The invention according to claim 1 is a first procedure for quantitatively measuring the eyelash state before applying the mascara, a second procedure for quantitatively measuring the eyelash state after using the mascara, and the mascara. The measurement result of the eyelash state before use of the eyelash and the measurement result of the eyelash state after use of the mascara are compared, and based on the comparison resultmascaraA third procedure to evaluate the usability ofThen, when measuring the eyelash state in the first and second procedures, a line-shaped imaging region is extracted in a direction orthogonal to the extending direction of the eyelashes from the imaged eyelash image, and the line shape The state of the eyelashes is measured based on the image of the imaging areaIt is characterized by doing.
[0018]
  According to the above invention, in the first and second means, since the state of the eyelash is quantitatively measured, an objective measurement process can be performed without including human abstract judgment. . Thereby, the accuracy of the usability evaluation performed in the third procedure can be improved, and a clear and accurate usability evaluation of the mascara can be performed.
  Moreover, according to said invention, when measuring an eyelash state, since the state of an eyelash is measured based on the image of the eyelash imaged with the imaging device, it becomes possible to measure an eyelash state quantitatively. Therefore, the accuracy of the usability evaluation performed in the third procedure can be improved, and a clear and accurate usability evaluation of the mascara can be performed.
According to the above invention, instead of all of the captured images, a linear imaging region is extracted in a direction orthogonal to the extending direction of the eyelashes in the image, and the entire image is extracted. The state of eyelashes is measured based on a line-shaped image having a small area. Thereby, the load of the processing apparatus which performs the quantitative measurement process of the eyelash state can be reduced, and the usability evaluation of the mascara can be performed in a short time. Further, by setting a plurality of line-shaped imaging regions to be extracted, it becomes possible to know a change in the thickness of the eyelashes.
[0019]
  In the invention according to claim 2, after applying mascaraBy extracting a line-shaped imaging region in a direction perpendicular to the extending direction of the eyelashes from the image of the eyelashes captured in the above, and measuring the state of the eyelashes based on the image of the line-shaped imaging regionThe usability of the mascara is evaluated.
[0020]
  As in the above-described invention, it is possible to evaluate the usability of the mascara from only the image after the mascara is applied without capturing the image before the mascara is applied.
[0021]
  The invention according to claim 3 is the invention according to claim 1.Or 2In the mascara usability evaluation method described,Based on the captured image of the eyelashes, at least one of the measurement items among the length, thickness, number, curl angle, and total area of the eyelashes is measured.Is.
[0022]
  According to the above invention, based on the image of the image of the eyelashes, the eyelash state is determined by measuring at least one of the measurement items of the length, thickness, number, curl angle, and total area of the eyelashes. It becomes possible to express it as a numerical value, and the eyelash state can be evaluated quantitatively and objectively. Therefore, the accuracy of usability evaluation can be improved, and a clear and accurate mascara usability evaluation can be performed.
[0023]
  The invention according to claim 4 is a mascara usability evaluation device that performs usability evaluation by comparing the eyelash state before applying the mascara and the eyelash state after using the mascara, Usability evaluation means for evaluating usability of the mascara by comparing the image of the image of the eyelash before application of the mascara and the image of the eyelash after application of the mascara,Image processing means for extracting a line-shaped imaging region in a direction orthogonal to the extending direction of the eyelashes from the captured image.,The usability evaluation means measures the state of the eyelashes based on the image of the line-shaped imaging region.It is a feature.
[0024]
  According to the above invention,When measuring the eyelash state, the eyelash state is measured based on the image of the eyelash taken by the imaging device, so that the eyelash state can be quantitatively measured. Therefore, the accuracy of the usability evaluation performed by the usability evaluation means can be improved, and a clear and accurate usability evaluation of the mascara can be performed.
  According to the above invention, the image processing means extracts a linear imaging region in a direction perpendicular to the extending direction of the eyelashes, not all of the captured images. And since the usability evaluation means measures the state of eyelashes based on a line-shaped image having a small area with respect to the entire image, the load of quantitative measurement processing of the eyelash state performed by the usability evaluation means (information Amount) can be reduced, and the usability evaluation of the mascara can be performed in a short time.
[0025]
  The invention according to claim 5 is a mascara usability evaluation apparatus for evaluating usability when mascara is applied, and is a captured image of eyelashes after mascara application.Image processing means for extracting a linear imaging region in a direction orthogonal to the extending direction of the eyelashes, and measuring the state of the eyelashes based on the image of the linear imaging region extracted by the image processing means By doingAnd usability evaluation means for evaluating usability of the mascara.
[0026]
  As in the above-described invention, it is possible to evaluate the usability of the mascara from only the image after the mascara is applied without capturing the image before the mascara is applied.
  According to the above invention, the image processing means extracts a linear imaging region in a direction perpendicular to the extending direction of the eyelashes, not all of the captured images. And since the usability evaluation means measures the state of eyelashes based on a line-shaped image having a small area with respect to the entire image, the load of quantitative measurement processing of the eyelash state performed by the usability evaluation means (information Amount) can be reduced, and the usability evaluation of the mascara can be performed in a short time.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0034]
FIG. 1 is a configuration diagram showing a mascara usability evaluation apparatus 10 according to an embodiment of the invention. This usability evaluation apparatus 10 is installed in, for example, a cosmetics floor of a department store, a cosmetic sales store, or a laboratory that develops mascara, and the usability of the mascara after applying mascara to the eyelashes 2 of the person to be measured 1 Is to evaluate.
[0035]
As shown in the figure, the usability evaluation device 10 includes a central processing unit 11, an input device 12, a display device 13, a storage device 14, an image processing device 15, a camera 16, and the like. Various processing programs to be described later are stored in the storage device 14, and the central processing unit 11 executes various processes necessary for evaluating mascara usability by executing the processing programs. The central processing unit 11 controls the input device 12, the display device 13, the storage device 14, the image processing device 15, and the camera 16 that are connected.
[0036]
The input device 12 is a keyboard, for example, and is used to input various data necessary for usability evaluation processing. The display device 13 is, for example, a CRT, and displays a mascara usability evaluation result obtained by performing usability evaluation processing, an image of the eyelashes 2 of the customer 1 captured by the camera 16, and the like.
The camera 16 is configured to be able to image the eyelashes 2 of the customer 1. The image of the eyelash 2 of the customer 1 captured by the camera 16 is subjected to image processing in the image processing device 15. Specifically, the image captured by the camera 16 is a screen binarized by the image processing device 15. Although not shown in FIG. 1, a printer output unit for printing a usability evaluation result may be provided.
[0037]
Next, a first example of mascara usability evaluation processing using the usability evaluation system 10 having the above system configuration will be described.
[0038]
When the usability evaluation device 10 is activated, the central processing unit 11 executes a main program for performing mascara usability evaluation processing stored in the storage device 14. FIG. 2 is a flowchart showing a main program for performing mascara usability evaluation processing.
[0039]
When the main program shown in the figure is started, first, in step 10 (step is abbreviated as S in the figure), measurement of the eyelash state before applying mascara is performed on the eyelash 2 of the person 1 to be measured. To do. FIG. 3 shows a specific process of the quantitative measurement of the eyelash state performed in step 10. The quantitative measurement process of the eyelash state shown in FIG. 3 is stored in the storage device 14 as a subprogram, and is called and executed in the process of step 10.
[0040]
When the quantitative measurement of the eyelash state shown in FIG. 3 is started, first, in step 20, an image input process of the eyelash 2 of the person to be measured 1 is performed. In this image input process, the central processing unit 11 activates the camera 16 and images the eyelashes 2 of the person to be measured 1. At this time, the camera 16 images the entire eyelashes 2 in a plan view. Although not included in the measurement items in this embodiment, when the curl angle of the eyelashes 2 (the angle indicated by the arrow θ in FIG. 1) is obtained, the eyelashes 2 are also imaged in a side view.
[0041]
In the subsequent step 21, the imaging screen imaged by the camera 16 is sent to the image processing device 15, and image processing is performed. Specifically, the picked-up image of the picked-up eyelashes 2 is binarized, and smoothing processing and noise removal processing are performed as necessary. FIG. 4 shows an image (binary image) of binarized eyelashes 2.
[0042]
When the processing of step 21 is completed and a binary image of the eyelash 2 is generated, subsequently, in step 22, the total area (S_{A 1}) Is performed. The processing for calculating the total area is obtained by obtaining the number of black pixels (number of pixels) in the binary image of the eyelashes 2 and multiplying this by the area corresponding to one pixel.
[0043]
When the total area of the eyelashes 2 is calculated in step 22, in a subsequent step 23, line image extraction processing is performed from the binary image of the eyelashes 2. FIG. 6 is a diagram for explaining line image extraction processing.
As shown in FIG. 6A, in the present embodiment, a linear imaging region is extracted in a direction orthogonal to the extending direction of the eyelashes 2 in the binary image of the eyelashes 2. FIG. 6B shows the extracted line image. In the example shown in the figure, an example in which a line image between 115 to 107 pixels is extracted from the hairline is shown.
[0044]
As described above, when the line-shaped image is extracted in step 23, the number of the eyelashes 2 is calculated in step 24 by analyzing the line-shaped image. The number (N) of the eyelashes 2 can be obtained by tracing the line image shown in FIG. 6B in, for example, the direction of the arrow X in FIG.
[0045]
In the following step 25, the thickness W1 of the eyelashes 2 (the average width of one eyelash) is calculated by analyzing the line-like image extracted in the same manner in step 23. As a specific calculation method, first, the number of black pixels in the line-shaped image shown in FIG. 6B is counted, and by multiplying this by the area of one pixel, the area of eyelashes 2 in the line-shaped image (S1). Ask for.
[0046]
Next, the obtained area (S1) is divided by the number (N1) of eyelashes 2 obtained in step 24 (S1 / N1). Thereby, the average area of one eyelash 2 is calculated | required. As described above, in this embodiment, the thickness of the line-shaped image is 8 pixels (115 pixels−107 pixels = 8 pixels). Therefore, the average area (S1 / N1) of one eyelash 2 obtained as described above is divided by 8 pixels. Thereby, the average width W1 (thickness) of one eyelash 2 is calculated | required. In addition, you may add the process made into a millimeter unit by performing unit conversion as needed.
[0047]
The total area (S of the eyelashes 2 obtained in step 22 as described above._{A 1}), The number (N1) of eyelashes 2 obtained in step 24, and the average width (W1) of one eyelash 2 obtained in step 25 are stored in the storage device 14 as measurement information before application in step 26. The By performing the above process, the process of step 10 of FIG. 2 is completed.
[0048]
When the process of step 10 is completed, subsequently, in step 11, mascara is applied to the eyelash 2 of the person to be measured 1 and quantitative measurement of the eyelash state after application is performed.
At this time, in order to prevent variation in the usability evaluation result depending on the mascara application method, the application conditions of the mascara are determined to be constant. Specifically, in this embodiment, a flock type brush is used as a brush for applying mascara, and the number of applications is 20 times. FIG. 5 is a diagram showing an example of eyelashes 2 after applying mascara.
[0049]
When the application of the mascara to the eyelashes 2 is completed, quantitative measurement of the eyelashes 2 is subsequently performed. The quantitative measurement of the eyelashes 2 after the mascara application is performed by the same method as the quantitative measurement of the eyelashes 2 before the mascara application performed in step 10 (that is, the quantitative measurement process of the eyelash state shown in FIG. 3). The
[0050]
Therefore, by carrying out the quantitative measurement process of the eyelash state shown in FIG. 3 in step 11, in step 22, the total area (S of the eyelashes 2 after application)_{A 2}) Is calculated, the number (N2) of the eyelashes 2 after application is calculated in step 24, and the average width (W2) of one eyelash 2 after application is calculated in step 25. The calculated measurement result after application is stored in the storage device 14 as post-application measurement information in step 26. By performing the above process, the process of step 11 of FIG. 2 is complete | finished.
[0051]
When the processing of step 11 shown in FIG. 2 is completed, subsequently, in step 12, the eyelash state before the mascara application and the eyelash state after the mascara application are compared, and the usability of the mascara is evaluated based on the comparison result. Do. That is, the central processing unit 11 reads out the pre-application measurement information and the post-application measurement information stored in the storage device 14 and performs a comparison process between them.
[0052]
  FIG. 7 shows an example of a mascara that has been subjected to the usability evaluation process in step 12. In the figure, the results of usability evaluation for five types of mascara A to E are shown. In FIG. 7, the bar graph shows the percentage of the eyelashes 2 after the mascara application as a percentage when the number of the eyelashes 2 before the mascara application is 100%. The line graph shows the thickness of the eyelashes 2 after the mascara application when the thickness of the eyelashes 2 before the mascara application is 100%.TheIt is a percentage display.
[0053]
From FIG. 7, for example, mascara A has about 75% of the number of eyelashes 2 after application compared to the number of eyelashes 2 before application of mascara (100%), and the change in the number is small (25%). change). On the other hand, the thickness after application is about 125% with respect to the thickness before application of eyelashes 2 (100%), and it can be seen that the thickness increases (change of 25%). Therefore, by applying the mascara A to the eyelashes 2, a sense of use with a volume feeling can be obtained.
[0054]
Further, from FIG. 7, the number of mascara C after application is about 60% of the number before application (100%), and the number is greatly reduced. On the other hand, the thickness after application is about 110% with respect to the thickness before application (100%), which is not much changed. Therefore, a clear feeling of use can be obtained by applying the mascara C to the eyelashes 2.
[0055]
Further, it can be seen that Mascara E has little change in the number of eyelashes 2 before and after application (100% → about 75%), and the change in thickness is not so large (100% → about 115%). Therefore, a natural feeling of use can be obtained by applying the mascara E to the eyelashes 2.
[0056]
As described above, according to the present embodiment, the eyelash state is quantitatively measured by performing the measurement processing of the eyelash 2 shown in FIG. Further, when measuring the eyelash state, an image captured by the camera 16 is converted into a value, and the image is processed to measure the eyelash state. For this reason, objective measurement processing can be performed without the human abstract judgment being included in the measurement result. Thereby, when performing the mascara usability evaluation in step 12 of FIG. 2, it is possible to improve the evaluation accuracy, and thus it becomes possible to perform a clear and accurate mascara usability assessment.
[0057]
Further, in this embodiment, in step 23 of FIG. 3, not all of the binarized images as described above, but in the direction orthogonal to the extending direction of the eyelashes 2 in the binarized image. A line-shaped imaging region is extracted, and the eyelash state is measured based on a line-shaped image having a small area with respect to the entire image. Thereby, the load of the central processing unit 11 which performs the quantitative measurement process of the eyelash state can be reduced, and the usability evaluation of the mascara can be performed in a short time.
[0058]
Next, mascara usability evaluation processing according to the second embodiment of the present invention will be described.
The mascara usability evaluation process according to the present embodiment is also performed using the usability evaluation apparatus 10 shown in FIG. 1 used in the first embodiment. In the mascara usability evaluation process of this embodiment, the description of the same process as the mascara usability evaluation process according to the first embodiment described above will be omitted.
[0059]
Also in this embodiment, when the usability evaluation apparatus 10 is activated, the central processing unit 11 executes a main program for performing mascara usability evaluation processing stored in the storage device 14. FIG. 8 is a flowchart showing a main program for performing mascara usability evaluation processing in this embodiment.
[0060]
When the main program shown in the figure is started, first, in step 30, measurement of the eyelash state after applying mascara to the eyelash 2 of the person to be measured 1 is performed. That is, in this embodiment, measurement of the eyelash state before applying mascara is not performed.
[0061]
In step 30, the same processing as described above with reference to FIG. 3 is performed. That is, first, in step 20, image input processing of the eyelashes 2 after mascara application is performed, and in the subsequent step 21, the captured image of the eyelashes 2 imaged by the camera 16 is binarized and smoothing processing or noise removal processing is performed as necessary. Further, in step 22, a process for calculating the total area of the eyelashes 2 is performed.
[0062]
In the subsequent step 23, the line image is extracted from the binary image of the eyelashes 2. At this time, the present embodiment is characterized in that the root, middle, and tip of the eyelashes 2 are extracted. FIG. 9 is a diagram for explaining line image extraction processing.
As shown in FIG. 9A, in this embodiment, in the binary image of the eyelashes 2, line-shaped imaging is performed at three locations, the root, the middle, and the tip of the eyelashes 2 in the direction orthogonal to the extending direction of the eyelashes 2. Extract regions. FIG. 9B shows the extracted line image. In the example shown in the figure, an example is shown in which a line-shaped image is extracted between 90 to 82 pixels from the hairline, between 115 to 107 pixels from the hairline, and from 140 to 132 pixels from the hairline to the tip. Yes.
[0063]
As described above, when the line-shaped image extraction process at the root, middle, and tip is performed in step 23, the number of the eyelashes 2 is calculated in step 24 by analyzing each line-shaped image. In step 25, the thickness of the eyelash 2 (average width of one eyelash) is calculated.
[0064]
As described above, the total area of the eyelashes 2 obtained in step 22, the number of eyelashes 2 obtained in step 24, and the width of the eyelashes 2 at the root, middle, and tip obtained in step 25 are calculated. Then, this calculation result is stored in the storage device 14 as post-application measurement information in step 26. By performing the above process, the process of step 30 of FIG. 8 is complete | finished.
[0065]
When the processing in step 30 is completed, mascara usability evaluation is performed based on the post-application measurement information stored in the storage device 14 in step 31. That is, the central processing unit 11 performs the comparison processing of the thickness and number of the eyelashes 2 at the root, middle, and tip positions based on the pre-application measurement information stored in the storage device 14.
[0066]
FIG. 10 shows an example of a mascara that has undergone the usability evaluation process in step 31. In the figure, the results of usability evaluation for five types of mascara A to E are shown. In addition, in FIG. 10, the usability based on the thickness of the eyelashes 2 is shown.
[0067]
From FIG. 10, it can be seen that, for example, by applying mascara A, the eyelashes 2 have a thick root and a very thin tip. Moreover, it can be seen that by applying mascara B, the eyelashes 2 are generally thick, but gradually become thinner from the root toward the tip. Moreover, by applying mascara C, it can be seen that the eyelashes 2 gradually become thin from the root to the middle, but have the same thickness from the middle to the tip. Furthermore, it can be seen that by applying mascara D, the eyelashes 2 are generally thin and have substantially the same thickness from the root to the tip.
[0068]
Therefore, when mascara AD is used from FIG. 10, the finished state (that is, usability) of eyelashes 2 after application can be known. As described above, in this embodiment, it is possible to evaluate the usability of the mascara only from the image after the mascara is applied without capturing the image before the mascara is applied.
[0069]
In the above-described embodiment, only the root, middle, and tip of the eyelash 2 are extracted as line images in the second embodiment, but the root and middle of the eyelash 2 are also used in the first embodiment. Further, a configuration may be adopted in which a line image is formed at three positions at the tip, and usability evaluation is performed based on this.
[0070]
In the above-described embodiment, image processing for binarizing an image captured by the camera 16 is performed. However, data captured by the camera 16 does not necessarily need to be binarized and is used for other processing. It is also possible to perform sex evaluation.
[0071]
【The invention's effect】
As described above, according to the present invention, various effects described below can be realized.
[0072]
  BookAccording to the invention, since objective measurement processing can be performed without including human abstract judgment, the accuracy of usability evaluation can be improved, and clear and accurate usability evaluation of mascara can be performed. Can be performed.
[0073]
  Also,BookAccording to the invention, since the state of the eyelash is measured based on the image of the eyelash captured by the imaging device, it is possible to measure the eyelash state quantitatively, and thus the usability evaluation performed in the third procedure. Accuracy can be improved.
[0074]
  Also,BookAccording to the invention, since the state of the eyelash is measured based on the line-shaped image having a narrow area with respect to all the captured images, it is possible to reduce the load on the processing device that performs the quantitative measurement process of the eyelash state. The usability evaluation of mascara can be performed in a short time.
[0075]
  Also,BookAccording to the invention, the eyelash state is represented as a numerical value by measuring at least one of the measurement items among the length, thickness, number, curl angle, and total area of the eyelashes based on the captured image. Thus, the eyelash state can be evaluated quantitatively and objectively, so that the accuracy of usability evaluation is improved and the usability evaluation of a clear and accurate mascara can be performed.
[0076]
  Also,BookAccording to the invention, it is possible to evaluate the usability of a mascara using only the image after the mascara is applied without taking in the image before the mascara is applied.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a mascara usability evaluation apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing mascara usability evaluation processing to which the mascara usability assessment method according to the first embodiment of the present invention is applied;
FIG. 3 is a flowchart showing measurement processing of an eyelash state.
FIG. 4 is a diagram showing an example of eyelashes before applying mascara.
FIG. 5 is a diagram showing an example of eyelashes after mascara application.
FIG. 6 is a diagram for explaining a specific method for measuring an eyelash state in the mascara usability evaluation method according to the first embodiment.
FIG. 7 is a diagram illustrating an example of a mascara usability evaluation result in the mascara usability evaluation method according to the first embodiment;
FIG. 8 is a flowchart showing mascara usability evaluation processing to which the mascara usability assessment method according to the second embodiment of the present invention is applied;
FIG. 9 is a diagram for explaining a specific method for measuring an eyelash state in the mascara usability evaluation method according to the first embodiment.
FIG. 10 is a diagram illustrating an example of a mascara usability evaluation result in the mascara usability evaluation method according to the second embodiment;
[Explanation of symbols]
1 customer
2 eyelashes
10 Mascara selection system
11 Central processing unit
12 Input devices
13 Display device
14 Storage device
15 Image processing device
16 Camera

Claims (5)

A first procedure for quantitatively measuring the state of eyelash before applying mascara;
A second procedure for quantitatively measuring the state of eyelash after using mascara;
Possess the measurement results of the eyelashes state before use of the mascara, comparing the measurement results of the eyelashes state after use of the mascara, and a third procedure for evaluating the use of mascara on the basis of the comparison result,
When measuring the eyelash state in the first and second procedures, a linear imaging region is extracted from the captured eyelash image in a direction orthogonal to the extending direction of the eyelash, and the linear imaging is performed. A mascara usability evaluation method comprising measuring the state of the eyelashes based on an image of a region . A line-shaped imaging region is extracted in a direction orthogonal to the extending direction of the eyelashes from the image of the eyelashes taken after applying mascara , and the state of the eyelashes is determined based on the image of the line-shaped imaging region. A method for evaluating the usability of a mascara, wherein the usability of the mascara is evaluated by measurement . The usability evaluation method for mascara according to claim 1 or 2 , wherein at least one of length, thickness, number, curl angle, and total area of the eyelashes based on the image of the imaged eyelashes . A mascara usability evaluation method characterized by measuring measurement items. A mascara usability evaluation device for evaluating usability by comparing the eyelash state before applying mascara and the eyelash state after using the mascara,
Usability evaluation means for evaluating usability of the mascara by comparing the image of the image of the eyelash before application of the mascara and the image of the eyelash after application of the mascara,
Image processing means for extracting a line-shaped imaging region in a direction orthogonal to the extending direction of the eyelashes from the captured image ;
The usability evaluation device for mascara , wherein the usability evaluation means measures the state of the eyelashes based on an image of the line-shaped imaging region . A mascara usability evaluation device that evaluates usability when mascara is applied,
Image processing means for extracting a line-shaped imaging region in a direction perpendicular to the extending direction of the eyelashes from the image of the eyelashes after application of the mascara ,
A usability evaluation means for evaluating usability of the mascara by measuring the state of the eyelashes based on the image of the line-shaped imaging region extracted by the image processing means . Usability evaluation device.

Images