WO2022118801A1 - 毛髪評価方法、プログラム、コンピュータ、および毛髪評価システム - Google Patents
毛髪評価方法、プログラム、コンピュータ、および毛髪評価システム Download PDFInfo
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- WO2022118801A1 WO2022118801A1 PCT/JP2021/043712 JP2021043712W WO2022118801A1 WO 2022118801 A1 WO2022118801 A1 WO 2022118801A1 JP 2021043712 W JP2021043712 W JP 2021043712W WO 2022118801 A1 WO2022118801 A1 WO 2022118801A1
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- hair
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- 210000004209 hair Anatomy 0.000 title claims abstract description 321
- 238000011156 evaluation Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 5
- 238000003384 imaging method Methods 0.000 abstract description 2
- 238000012937 correction Methods 0.000 description 24
- 238000010586 diagram Methods 0.000 description 17
- 210000003128 head Anatomy 0.000 description 9
- 210000004761 scalp Anatomy 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000012854 evaluation process Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003779 hair growth Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
Definitions
- the present invention relates to a hair evaluation method, a program, a computer, and a hair evaluation system.
- the area for evaluating the hair in the photographed image is visually determined by a person. Therefore, there may be a discrepancy between the area that should be originally evaluated and the area that was actually evaluated. As a result, the hair cannot be evaluated accurately.
- a method is to scan a predetermined range of images taken by the user's head in a certain direction to measure a hair portion, and to scan the hair portion in the fixed direction in the image. This includes detecting a region occupied by the hair portion having the minimum proportion, and determining a region occupied by the hair portion having the minimum proportion as a hair division.
- the accuracy of hair evaluation can be improved.
- the hair division indicates a part where the hair is divided or a part where the hair is divided, and usually means a region where the hair is divided in opposite directions. .. That is, the hair is divided in opposite directions with the hair division as a boundary.
- “divided in opposite directions” includes the case where the hair flow (direction from the root of the hair to the tip of the hair) intersects perpendicularly to the parting of the hair, and the hair flow is the hair. It also includes the case where the direction intersects diagonally with respect to the division. In the latter part, an example of hair division will be described with reference to FIG. 9.
- the hair division may be a division made for hair evaluation or a naturally occurring division.
- the "hair coverage ratio” means the ratio of the area occupied by the hair portion in the image. For example, if the diameter of the hair is the same, it is estimated that the larger the number of hairs, the larger the hair coverage. Further, for example, if the number of hairs is the same, it is estimated that the larger the diameter of the hair, the larger the hair coverage.
- FIG. 1 is an overall configuration diagram (Example 1) according to an embodiment of the present invention.
- the hair evaluation terminal 10 can acquire an image taken by the image pickup device 20. Each will be described below.
- the hair evaluation terminal 10 is a computer for evaluating hair.
- the hair evaluation terminal 10 determines the hair division in the image taken by the image pickup apparatus 20. Further, the hair evaluation terminal 10 can evaluate the hair by using the hair division.
- the hair evaluation terminal 10 is a personal computer, a tablet terminal, a smartphone, or the like.
- the image pickup device 20 is a device for photographing hair. Specifically, the image pickup apparatus 20 photographs the user's head.
- the image pickup device 20 is a digital camera or the like.
- FIG. 2 is an overall configuration diagram (Example 2) according to an embodiment of the present invention.
- the hair evaluation system 1 includes a hair evaluation terminal 10, an image pickup device 20, and a hair evaluation server 30.
- the hair evaluation terminal 10 can acquire an image taken by the image pickup device 20.
- the hair evaluation terminal 10 and the hair evaluation server 30 can send and receive data to and from each other via an arbitrary network. Each will be described below.
- the hair evaluation terminal 10 transmits the image taken by the image pickup device 20 to the hair evaluation server 30. Further, the hair evaluation terminal 10 receives information on the hair division from the hair evaluation server 30. Further, the hair evaluation terminal 10 can receive hair evaluation information (for example, hair coverage) from the hair evaluation server 30.
- the hair evaluation terminal 10 is a personal computer, a tablet terminal, a smartphone, or the like.
- the image pickup device 20 is a device for photographing hair. Specifically, the image pickup apparatus 20 photographs the user's head.
- the image pickup device 20 is a digital camera or the like.
- the hair evaluation server 30 is a computer for evaluating hair.
- the hair evaluation server 30 receives the image taken by the image pickup apparatus 20 from the hair evaluation terminal 10. Further, the hair evaluation server 30 determines the hair division in the image taken by the image pickup apparatus 20. Further, the hair evaluation server 30 transmits information on the hair division to the hair evaluation terminal 10. Further, the hair evaluation server 30 can evaluate the hair by using the hair division. In addition, the hair evaluation server 30 can transmit hair evaluation information (for example, hair coverage) to the hair evaluation terminal 10.
- the hair evaluation server 30 is a server including one or a plurality of computers.
- the hair evaluation terminal 10 and the image pickup device 20 have been described as separate devices in FIGS. 1 and 2, the hair evaluation terminal 10 and the image pickup device 20 are combined into one device (for example, a tablet terminal with a camera). It may be implemented with.
- FIG. 3 is a functional block diagram of a hair evaluation terminal 10 (in the case of Example 1 of FIG. 1) and a hair evaluation server 30 (in the case of Example 2 of FIG. 2) according to an embodiment of the present invention.
- the hair evaluation terminal 10 and the hair evaluation server 30 include an image acquisition unit 101, an angle correction unit 102, a hair identification unit 103, a measurement unit 104, a detection unit 105, and a part determination unit.
- 106, a range setting unit 107, and a hair evaluation unit 108 can be provided.
- the hair evaluation terminal 10 and the hair evaluation server 30 execute the program to execute the image acquisition unit 101, the angle correction unit 102, the hair identification unit 103, the measurement unit 104, the detection unit 105, the division determination unit 106, and the range setting. It can function as a unit 107 and a hair evaluation unit 108.
- the image acquisition unit 101 acquires an image taken by the image pickup device 20.
- the image is an image of the head of the user whose hair is evaluated.
- the photographer photographs a predetermined area of the user's head.
- the predetermined range is a range visually determined by the photographer based on the mark on the user's scalp.
- the angle correction unit 102 includes the angle of a predetermined shape and a region of a predetermined size (hereinafter, also referred to as “frame”) in the image acquired by the image acquisition unit 101, and the angle of the image acquired by the image acquisition unit 101. , Is corrected. Specifically, the angle correction unit 102 specifies the angle (direction) of the hair division in the image taken by the image pickup apparatus 20. The angle correction unit 102 specifies the angle of the hair division according to an instruction (instruction based on the position of pores or the like) from the operator of the hair evaluation terminal 10 or the hair evaluation server 30, or analyzes the image. You can specify the angle of the hair part. Further, the angle correction unit 102 rotates the frame or the image so that the angle of the frame and the angle of the hair division match.
- frame a region of a predetermined size
- the hair specifying unit 103 specifies the hair portion of the image acquired by the image acquisition unit 101.
- the hair specifying unit 103 can specify the hair portion by binarizing the image acquired by the image acquisition unit 101.
- the measuring unit 104 scans the image acquired by the image acquiring unit 101 in a certain direction to measure the hair portion. Specifically, the measuring unit 104 measures the hair coverage in a predetermined shape and a predetermined size region (frame) in the image.
- the detection unit 105 detects a region (that is, a frame having the minimum hair coverage) in the image in which the hair portion occupies the minimum ratio by scanning the measuring unit 104 in a certain direction.
- the part division determination unit 106 determines a region detected by the detection unit 105 in which the ratio occupied by the hair portion is the smallest as a hair division.
- the range setting unit 107 sets the area including the hair division as the area for evaluating the hair.
- the range setting unit 107 can set a region obtained by adding an arbitrary region to the region determined as the hair division as a region for evaluating the hair.
- the hair evaluation unit 108 evaluates the hair.
- the hair evaluation unit 108 can display the evaluation result on the display device of the hair evaluation terminal 10.
- the hair evaluation unit 108 can evaluate the user's hair based on the hair portion in the region including the hair division. For example, the hair evaluation unit 108 can calculate the user's hair coverage.
- the hair evaluation unit 108 can evaluate the change in the user's hair based on the time-series data of the hair portion in the region including the hair division. For example, the hair evaluation unit 108 can evaluate that the user's hair coverage has increased, the user's hair coverage has decreased, the user's hair coverage has not changed, and the like.
- FIG. 4 is a flowchart of the hair evaluation process according to the embodiment of the present invention.
- step 1 (S1) the image acquisition unit 101 acquires an image taken by the image pickup apparatus 20.
- step 2 the angle correction unit 102 corrects the angle of the region (frame) having a predetermined shape and a predetermined size in the image acquired in S1 and the angle of the image acquired in S1. do. Note that S2 may be omitted.
- step 3 (S3) the hair specifying unit 103 identifies the hair portion of the image acquired in S1.
- S2 and S3 may be reversed.
- step 4 (S4) the measuring unit 104 measures the hair portion by scanning the image whose angle has been corrected in S2 in a certain direction.
- step 5 (S5) the detection unit 105 detects the region in which the hair portion occupies the smallest proportion in the image by scanning in the fixed direction of S4.
- step 6 (S6) the division determination unit 106 determines the region in which the proportion of the hair portion detected in S5 is the smallest as the hair division.
- step 7 (S7) the range setting unit 107 sets the region including the hair division determined in S6 as the region for evaluating the hair.
- step 8 (S8) the hair evaluation unit 108 evaluates the user's hair based on the hair portion in the region set in S7.
- FIG. 5 is a flowchart of an angle correction process (S2 in FIG. 4) according to an embodiment of the present invention.
- step 11 (S11) the angle correction unit 102 specifies the angle of the hair division in the image taken by the image pickup device 20.
- the angle correction unit 102 specifies the angle of the hair division according to an instruction (instruction based on the position of pores or the like) from the operator of the hair evaluation terminal 10 or the hair evaluation server 30, or analyzes the image. You can specify the angle of the hair part.
- step 12 (S12) the angle correction unit 102 sets the frame or so that the angle of the region (frame) having a predetermined shape and a predetermined size in the image matches the angle of the hair division specified in S11. Rotate the image.
- FIG. 6 is a transition diagram of an image according to an embodiment of the present invention.
- the image acquisition unit 101 acquires an image taken by the image pickup apparatus 20.
- the [photographed] image on the upper left of FIG. 6 is an image acquired by the image acquisition unit 101.
- the image acquisition unit 101 converts the acquired image into a 32-bit black-and-white image.
- the image of [Convert to 32-bit black-and-white] in the upper right of FIG. 6 is an image obtained by converting the image of [Shooting] into a 32-bit black-and-white image by the image acquisition unit 101.
- the angle correction unit 102 corrects the angle by designating the angle of the hair division.
- the image of [Specifying the angle of the parting] at the lower left of FIG. 6 is an image in which the angle correction unit 102 specifies the angle of the parting of the hair.
- the angle correction unit 102 specifies the angle of the hair division according to an instruction (instruction based on the position of pores or the like) from the operator of the hair evaluation terminal 10 or the hair evaluation server 30, or analyzes the image. You can specify the angle of the hair part.
- the hair specifying portion 103 identifies the hair portion by binarization.
- the [binarized] image at the lower right of FIG. 6 is an image obtained by binarizing the hair specifying portion 103.
- FIG. 7 is a diagram for explaining scanning according to an embodiment of the present invention.
- the measuring unit 104 can move the rectangular frame having long sides along the hair division in the direction in which the hair is divided.
- the range setting unit 107 extends the region determined as the hair division in the direction perpendicular to the hair division (in the example of FIG. 7, the region on both long sides is added) to the hair. It can be set as an area to be evaluated.
- the angle correction unit 102 designates the angle of the hair division in the image taken by the image pickup apparatus 20 ([designation of the division angle] in FIG. 6). Then, the angle correction unit 102 rotates the frame or the image so that the angle of the frame and the angle of the hair division match (in the example of FIG. 7, the long side of the frame and the hair division are parallel). Let me.
- FIG. 8 is a diagram for explaining the designation of the angle of the division according to the embodiment of the present invention.
- the angle correction unit 102 can analyze the image and specify the angle of the hair division. Specifically, the angle correction unit 102 scans each of the plurality of ranges in a fixed direction (in the example of FIG. 8, scans each of the three vertically long rectangular ranges in the vertical direction), analyzes the image, and analyzes the hair. A region assumed to be a division (for example, a region determined based on a 32-bit black-and-white image; in the example of FIG. 8, three regions indicated by arrows) is detected. The angle correction unit 102 uses a line connecting the detected regions (in the example of FIG. 8, a solid line connecting the three regions) as a line indicating the angle of the hair division.
- a line connecting the detected regions in the example of FIG. 8, a solid line connecting the three regions
- FIG. 9 is a diagram for explaining a hair division according to an embodiment of the present invention.
- the hair division may be a boundary when the hair flow (direction from the root of the hair to the tip of the hair) intersects the hair division perpendicularly (in the case of (A) in FIG. 9). , When the hair flow intersects the hair part diagonally (greater than 0 degrees and less than 90 degrees) (when the hair flow is symmetrical about the part as shown in FIG. 9B), and , When the hair flow is asymmetric about the division as shown in FIG. 9 (C)).
- FIG. 10 is a diagram for explaining a hair covering ratio according to an embodiment of the present invention. As shown in FIG. 10, the region having the smallest hair coverage is determined as the hair division. The hair coverage increases as the distance from the region determined as the hair division (moving toward the "upper image” direction in FIG. 10 or toward the "lower image” direction in FIG. 10).
- FIG. 11 is a diagram for explaining the deviation in the vertical direction with respect to the hair division.
- the three images in which the head of FIG. 11 is taken are the same image.
- the frame In the [reference position] on the right side of FIG. 11, the frame is arranged at the reference position.
- the frame was moved by 75pixel (0.5 mm) in the vertical direction (Y-axis direction in FIG. 11) on the scalp with respect to the hair division from the reference position. It is placed in a position.
- [-150pixel] on the left side of FIG. 11 the frame is moved by 150pixel (1 mm) in the vertical direction (Y-axis direction in FIG. 11) on the scalp with respect to the hair division from the reference position. Have been placed.
- the hair coverage in the frame was 10.872%.
- the hair coverage in the frame was 11.057%, and the ratio to the hair coverage at the [reference position] was 1.017.
- the hair coverage in the frame was 11.655%, and the ratio to the hair coverage at the [reference position] was 1.072.
- the hair coverage increased as the frame moved away from the hair division.
- FIG. 12 is a diagram for explaining an oblique deviation with respect to the hair division.
- the frame In the [reference angle] of FIG. 12, the frame is arranged at a reference angle.
- the frame In [-10 °] of FIG. 12, the frame is arranged so as to be rotated 10 ° diagonally (in the Y-axis direction of FIG. 12) on the scalp with respect to the hair division with respect to the reference angle.
- the hair coverage in the frame was 10.821%.
- the hair coverage in the frame was 11.543%, and the ratio to the hair coverage at [reference angle] was 1.067. As described above, even in the same image, when the frame was slanted with respect to the hair division, the hair coverage increased.
- FIG. 13 is a diagram for explaining binarization according to an embodiment of the present invention.
- the image is binarized in a plurality of regions (for example, the binarized regions 1 and 2 in FIG. 13). It is possible to divide the binarization area 2, the binarization area 3, etc., hereinafter referred to as the binarization area) and binarize each binarization area using the threshold value set for each binarization area. can. Hereinafter, it will be described in detail.
- pixels whose pixel value is equal to or higher than the threshold value are converted to white, and pixels whose pixel value is less than the threshold value (the part assumed to be hair) are converted to black. Convert to.
- the threshold value is set low (on the black side) due to the influence of the darkened portion, so that the light-colored hair in the bright portion cannot be detected). Therefore, if the entire image is binarized at one time (that is, with one threshold value), there are areas where erroneous detection occurs. Therefore, it is desirable to binarize each area using a threshold value suitable for each area.
- the process of specifying the hair portion by binarization can be performed for each binarized region in the image (note that the scanning frame (frame in FIG. 7). ) Is set as the binarized region, and the process of measuring the hair coverage (step 4 in FIG. 4) may also be performed for each binarized region).
- Each binarization region and each threshold value may be those specified and set by the operator of the hair evaluation terminal 10 or the hair evaluation server 30, or those set by the hair evaluation terminal 10 or the hair evaluation server 30. But it may be.
- the detection unit 105 and the parting determination unit 106 are binarized with the minimum hair coverage from the results of measurement of the hair coverage in each binarization region.
- the area is determined as a hair part.
- the range setting unit 107 and the hair evaluation unit 108 use a region obtained by adding an arbitrary region to the binarization region determined as the hair division as a region for evaluating hair. Evaluate the hair after setting (calculate the hair coverage in the area where the hair is evaluated).
- the binarized area is set to 2/3 of the number of pixels on the vertical axis of the image (2.0 cm) and the number of pixels on the vertical axis.
- the size was halved (1.5 cm) and the size was 1/4 of the number of pixels on the vertical axis (0.75 cm)
- the binarized area has a size of 1/6 (0.5 cm) of the number of pixels on the vertical axis of the image and a size of 1/20 (0.15 cm) of the number of pixels on the vertical axis, false detection in the binarized area is performed.
- the region occupied by the hair portion is determined as the hair division, and the hair is evaluated based on the hair portion of the region including the hair division. Therefore, the hair can be evaluated correctly without any deviation caused by the visual determination of the region for evaluating the hair by a person. Moreover, since the hair in the same region can always be evaluated, when the hair is evaluated over time, the change in the hair can be evaluated correctly.
- the region where the hair portion occupies the minimum ratio at each position is detected, and the region where the hair portion occupies the minimum ratio among those regions is the hair. It may be decided as a division of.
- FIG. 14 is a block diagram showing an example of the hardware configuration of the hair evaluation terminal 10 and the hair evaluation server 30 according to the embodiment of the present invention.
- the hair evaluation terminal 10 and the hair evaluation server 30 have a CPU (Central Processing Unit) 1001, a ROM (Read Only Memory) 1002, and a RAM (Random Access Memory) 1003.
- the CPU 1001, ROM 1002, and RAM 1003 form a so-called computer.
- the hair evaluation terminal 10 and the hair evaluation server 30 can have an auxiliary storage device 1004, a display device 1005, an operation device 1006, an I / F (Interface) device 1007, and a drive device 1008.
- the hardware of the hair evaluation terminal 10 and the hair evaluation server 30 are connected to each other via the bus B.
- the CPU 1001 is an arithmetic device that executes various programs installed in the auxiliary storage device 1004.
- ROM 1002 is a non-volatile memory.
- the ROM 1002 functions as a main storage device for storing various programs, data, and the like necessary for the CPU 1001 to execute various programs installed in the auxiliary storage device 1004.
- the ROM 1002 functions as a main storage device for storing boot programs such as BIOS (Basic Input / Output System) and EFI (Extensible Firmware Interface).
- RAM1003 is a volatile memory such as DRAM (Dynamic RandomAccessMemory) or SRAM (StaticRandomAccessMemory).
- the RAM 1003 functions as a main storage device that provides a work area to be expanded when various programs installed in the auxiliary storage device 1004 are executed by the CPU 1001.
- the auxiliary storage device 1004 is an auxiliary storage device that stores various programs and information used when various programs are executed.
- the display device 1005 is a display device that displays the internal state of the hair evaluation terminal 10 and the hair evaluation server 30.
- the operation device 1006 is an input device in which the administrator of the hair evaluation terminal 10 and the hair evaluation server 30 inputs various instructions to the hair evaluation terminal 10 and the hair evaluation server 30.
- the I / F device 1007 is a communication device for connecting to a network and communicating with the hair evaluation terminal 10 and the hair evaluation server 30.
- the drive device 1008 is a device for setting the storage medium 1009.
- the storage medium 1009 referred to here includes a medium such as a CD-ROM, a flexible disk, a magneto-optical disk, or the like, which records information optically, electrically, or magnetically. Further, the storage medium 1009 may include a semiconductor memory for electrically recording information such as an EPROM (ErasableProgrammableReadOnlyMemory) and a flash memory.
- EPROM ErasableProgrammableReadOnlyMemory
- the various programs installed in the auxiliary storage device 1004 are installed, for example, by setting the distributed storage medium 1009 in the drive device 1008 and reading the various programs recorded in the storage medium 1009 by the drive device 1008. Will be done.
- various programs installed in the auxiliary storage device 1004 may be installed by being downloaded from the network via the I / F device 1007.
- Hair evaluation system 10 Hair evaluation terminal 20 Imaging device 30 Hair evaluation server 101 Image acquisition unit 102 Angle correction unit 103 Hair identification unit 104 Measurement unit 105 Detection unit 106 Parting determination unit 107 Range setting unit 108 Hair evaluation unit 1001 CPU 1002 ROM 1003 RAM 1004 Auxiliary storage device 1005 Display device 1006 Operation device 1007 I / F device 1008 Drive device 1009 Storage medium
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Abstract
Description
・本明細書において、「毛髪の分け目」とは、毛髪を分けた箇所または毛髪が分かれている箇所を示し、通常、毛髪が互いに反対方向に分かれているときに境となる領域のことをいう。つまり、毛髪は、毛髪の分け目を境に互いに反対方向に分かれている。なお、"互いに反対方向に分かれている"とは、毛流(毛の根本から毛先への方向)が毛髪の分け目に対して垂直に交わる方向である場合も含むし、毛流が毛髪の分け目に対して斜めに交わる方向である場合も含む。後段で、図9を参照しながら、毛髪の分け目の例を説明する。なお、毛髪の分け目は、毛髪の評価のために作られた分け目であってもよいし、自然に生じた分け目であってもよい。
・本明細書において、「毛髪被覆率」とは、画像内で毛髪部分が占める面積の割合のことをいう。例えば、毛髪の直径が同じであれば、毛髪の本数が多いユーザほど、毛髪被覆率が大きいと推定される。また、例えば、毛髪の本数が同じであれば、毛髪の直径が大きいユーザほど、毛髪被覆率が大きいと推定される。
全体の構成を実施例1と実施例2とに分けて説明する。
図1は、本発明の一実施形態に係る全体の構成図(実施例1)である。毛髪評価端末10は、撮像装置20が撮影した画像を取得することができる。以下、それぞれについて説明する。
図2は、本発明の一実施形態に係る全体の構成図(実施例2)である。毛髪評価システム1は、毛髪評価端末10と、撮像装置20と、毛髪評価サーバ30と、を含む。毛髪評価端末10は、撮像装置20が撮影した画像を取得することができる。毛髪評価端末10と毛髪評価サーバ30とは、任意のネットワークを介して、互いにデータを送受信することができる。以下、それぞれについて説明する。
図3は、本発明の一実施形態に係る毛髪評価端末10(図1の実施例1の場合)および毛髪評価サーバ30(図2の実施例2の場合)の機能ブロック図である。図3に示されるように、毛髪評価端末10および毛髪評価サーバ30は、画像取得部101と、角度補正部102と、毛髪特定部103と、測定部104と、検出部105と、分け目決定部106と、範囲設定部107と、毛髪評価部108と、を備えることができる。また、毛髪評価端末10および毛髪評価サーバ30は、プログラムを実行することで、画像取得部101、角度補正部102、毛髪特定部103、測定部104、検出部105、分け目決定部106、範囲設定部107、毛髪評価部108として機能することができる。
以下、図4を参照しながら毛髪評価処理について説明し、図5を参照しながら角度補正処理について説明する。
図4は、本発明の一実施形態に係る毛髪評価処理のフローチャートである。
図5は、本発明の一実施形態に係る角度補正処理(図4のS2)のフローチャートである。
図13は、本発明の一実施形態に係る二値化について説明するための図である。本発明の一実施形態では、毛髪特定部103は、ユーザの頭部が撮影された画像を二値化するときに、該画像を複数の領域(例えば、図13の二値化領域1、二値化領域2、二値化領域3等。以下、二値化領域という)に分けて、二値化領域ごとに設定される閾値を用いて、二値化領域ごとに二値化することができる。以下、詳細に説明する。
このように、本発明の一実施形態では、毛髪部分が占める割合が最小である領域を毛髪の分け目として決定し、毛髪の分け目を含む領域の毛髪部分に基づいて毛髪を評価する。そのため、毛髪を評価する領域を人が目視により決定することにより生じるズレが起こらず、毛髪を正しく評価することができる。また、常に同一の領域の毛髪を評価することができるので、経時的に毛髪を評価する場合、毛髪の変化を正しく評価することができる。
図14は、本発明の一実施形態に係る毛髪評価端末10および毛髪評価サーバ30のハードウェア構成の一例を示すブロック図である。
10 毛髪評価端末
20 撮像装置
30 毛髪評価サーバ
101 画像取得部
102 角度補正部
103 毛髪特定部
104 測定部
105 検出部
106 分け目決定部
107 範囲設定部
108 毛髪評価部
1001 CPU
1002 ROM
1003 RAM
1004 補助記憶装置
1005 表示装置
1006 操作装置
1007 I/F装置
1008 ドライブ装置
1009 記憶媒体
Claims (11)
- ユーザの頭部が撮影された所定の範囲の画像を一定方向に走査して毛髪部分を測定することと、
前記一定方向の走査によって、前記画像内で前記毛髪部分が占める割合が最小である領域を検出することと、
前記毛髪部分が占める割合が最小である領域を前記毛髪の分け目として決定することと
を含む方法。 - 前記毛髪は、前記毛髪の分け目を境に互いに反対方向に分かれている、請求項1に記載の方法。
- 前記毛髪の分け目を含む領域の毛髪部分に基づいて、前記ユーザの毛髪を評価することをさらに含む、請求項1または2に記載の方法。
- 前記毛髪の分け目を含む領域の毛髪部分の時系列データに基づいて、前記ユーザの毛髪の変化を評価することをさらに含む、請求項3に記載の方法。
- 前記測定は、前記画像内の所定の形および大きさの領域内の毛髪部分を測定することによって行われ、
前記検出は、前記画像内の所定の形および大きさの領域のうち前記毛髪部分が占める割合が最小である領域を検出することによって行われる、請求項1から4のいずれか一項に記載の方法。 - 前記所定の形および大きさの領域の角度と、前記画像の角度と、を補正することをさらに含む請求項5に記載の方法。
- 前記ユーザの頭部が撮影された所定の範囲の画像の毛髪部分を二値化によって特定することをさらに含む、請求項1から6のいずれか一項に記載の方法。
- 前記二値化は、前記ユーザの頭部が撮影された所定の範囲の画像を複数の二値化領域に分けて、前記二値化領域ごとに設定される閾値を用いて前記二値化領域ごとに行う、請求項7に記載の方法。
- コンピュータを
ユーザの頭部が撮影された所定の範囲の画像を一定方向に走査して毛髪部分を測定する測定部、
前記一定方向の走査によって、前記画像内で前記毛髪部分が占める割合が最小である領域を検出する検出部、
前記毛髪部分が占める割合が最小である領域を前記毛髪の分け目として決定する決定部
として機能させるためのプログラム。 - ユーザの頭部が撮影された所定の範囲の画像を一定方向に走査して毛髪部分を測定する測定部と、
前記一定方向の走査によって、前記画像内で前記毛髪部分が占める割合が最小である領域を検出する検出部と、
前記毛髪部分が占める割合が最小である領域を前記毛髪の分け目として決定する決定部と
を備えたコンピュータ。 - 毛髪評価サーバと毛髪評価端末とを含む毛髪評価システムであって、
前記毛髪評価サーバは、
ユーザの頭部が撮影された所定の範囲の画像を一定方向に走査して毛髪部分を測定する測定部と、
前記一定方向の走査によって、前記画像内で前記毛髪部分が占める割合が最小である領域を検出する検出部と、
前記毛髪部分が占める割合が最小である領域を前記毛髪の分け目として決定する決定部と、を備え、
前記毛髪評価端末は、
前記ユーザの頭部が撮影された所定の範囲の画像を前記毛髪評価サーバへ送信し、
前記毛髪の分け目の情報を前記毛髪評価サーバから受信する、毛髪評価システム。
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JPH0491017A (ja) * | 1990-08-07 | 1992-03-24 | Kanebo Ltd | 脱毛度の測定方法 |
JP2002360545A (ja) * | 2001-06-12 | 2002-12-17 | Shiseido Co Ltd | 薄毛部面積評価方法およびそのシステムならびに薄毛部位置決め板および薄毛部面積評価用見本写真 |
JP2013009700A (ja) * | 2011-06-27 | 2013-01-17 | Kentaro Masaki | 頭髪撮影画像のデータ処理方法およびデータ比較方法 |
JP2019084024A (ja) * | 2017-11-07 | 2019-06-06 | 株式会社Aventino | 頭部画像評価装置及び頭部画像評価方法 |
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JPH0491017A (ja) * | 1990-08-07 | 1992-03-24 | Kanebo Ltd | 脱毛度の測定方法 |
JP2002360545A (ja) * | 2001-06-12 | 2002-12-17 | Shiseido Co Ltd | 薄毛部面積評価方法およびそのシステムならびに薄毛部位置決め板および薄毛部面積評価用見本写真 |
JP2013009700A (ja) * | 2011-06-27 | 2013-01-17 | Kentaro Masaki | 頭髪撮影画像のデータ処理方法およびデータ比較方法 |
JP2019084024A (ja) * | 2017-11-07 | 2019-06-06 | 株式会社Aventino | 頭部画像評価装置及び頭部画像評価方法 |
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