WO2017022045A1 - 携帯情報装置、寸法測定方法、および寸法測定プログラム - Google Patents
携帯情報装置、寸法測定方法、および寸法測定プログラム Download PDFInfo
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- WO2017022045A1 WO2017022045A1 PCT/JP2015/071909 JP2015071909W WO2017022045A1 WO 2017022045 A1 WO2017022045 A1 WO 2017022045A1 JP 2015071909 W JP2015071909 W JP 2015071909W WO 2017022045 A1 WO2017022045 A1 WO 2017022045A1
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
- A43D1/00—Foot or last measuring devices; Measuring devices for shoe parts
- A43D1/02—Foot-measuring devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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
- A61B5/117—Identification of persons
Definitions
- the present invention relates to a technique for measuring dimensions with a portable information device.
- Patent Document 1 discloses a foot placement base that is formed in a size that allows both feet to be placed in parallel, and has a substantially flat foot placement portion on which each foot is placed, and each foot of the foot placement base.
- a plurality of substantially plate-shaped mirrors that are tilted at a predetermined angle with respect to the placement site and are arranged on the side of the foot placement site, and spaced apart upward from the foot placement table.
- One or a plurality of imaging means for capturing the mirror image of the upper surface of both feet placed on the upper surface and the side surface of the foot reflected in the mirror, and outputting each image information of the upper and lower surfaces of both feet, and outputting from the imaging means
- a foot size measuring device provided with measurement processing means for computing the image information to be processed and deriving the dimensions of predetermined portions of both feet.
- the size of a foot can be measured.
- the device is a dedicated device that is premised on introduction into a store, and an individual user can measure the size of a foot at home or the like. Is a big one.
- An object of the present invention is to provide a technique for measuring dimensions using a portable information device such as a smartphone or a tablet terminal.
- a portable information device includes a camera, a tilt sensor, and a processing unit, and the processing unit captures a foot position guide image indicating a foot placement region, which is a region where a foot is placed, by the camera.
- the camera is superimposed on the camera image and the tilt sensor is used to detect the tilt of the camera with respect to a predetermined plane, and when the camera tilt is equal to or less than a predetermined tilt threshold, the foot placement on the plane
- a still image including a foot placed in an area and a reference object representing a predetermined shape and size and placed on the plane is photographed by the camera to generate image data, and the reference object in the image data
- a portable information device that calculates the size of the foot based on the foot region.
- a portable information device such as a smartphone or a tablet terminal.
- FIG. 1 is a diagram illustrating a state in which the dimensions of the foot are measured by the portable information device according to the present embodiment.
- the portable information device 10 is an information processing device that is used while being held by a hand, as typified by a smartphone or a tablet terminal.
- the portable information device 10 can install an application software program and operates by executing the application.
- the portable information device 10 can realize various functions depending on the application to be installed.
- the length of the foot FT is the length of the longest portion of the foot in the front-rear direction.
- the width of the foot FT may be included as a dimension of the foot FT.
- the size of the foot FT measured with this application can be used for shoe size selection when purchasing shoes on the EC site (electronic commerce site).
- the application itself may include not only a function of measuring the size of the foot FT but also various functions for using the EC site.
- the reference object CD is, for example, a card having a predetermined shape, size, and pattern.
- FIG. 2 is a block diagram of the portable information device.
- the portable information device 10 includes a processor 20, a storage device 12, a tilt sensor 13, a speaker 14, a touch panel display 15, a camera 16, and a communication module 17.
- the processor 20 is a processing device that executes an operating system and applications.
- the processor 20 realizes the functions of the guide unit 21, the tilt detection unit 22, the still image shooting unit 23, and the calculation unit 24 by executing the application. The functions of these units will be described later.
- the storage device 12 is a storage device that holds an application program, setting information necessary for the application to operate, data used for processing by the application, and the like.
- the tilt sensor 13 is a sensor that detects the tilt of the portable information device 10.
- the inclination of the portable information device 10 is also the inclination of the camera 16.
- the speaker 14 is an audio output device that outputs audio based on the processing of the processor 20.
- the touch panel display 15 is an operation display device in which an output device that displays an image, text, or the like on a screen based on processing of the processor 20 and an input device that receives a user operation are integrated.
- the output device displays an image or the like on the screen, and the input device accepts a touch device for the screen.
- the camera 16 outputs a real-time moving image and shoots a still image according to an instruction.
- the communication module 17 is a module that performs wireless communication via a mobile phone network or Wi-Fi.
- the processor 20 accesses the EC site via the network using the communication module 17.
- the storage device 12 stores an application that makes it possible to measure the dimension of the foot FT, and the processor 20 executes the application in FIG. Perform the operation shown.
- Fig. 3 is a flowchart of the entire foot measurement process.
- the guide unit 21 displays a foot position guide image indicating a foot placement region, which is a region where the foot FT is placed, on the touch panel display 15 so as to be superimposed on a camera video that is a video captured by the camera 16 (step S101).
- the user adjusts the position of the foot FT and the position and direction of the camera 16 so that the foot FT fits in the foot placement area according to the guide based on the foot position guide image displayed on the touch panel display 15.
- adjustment is made so that a reference object representing a predetermined shape and size is also included in the camera image.
- the reference object is, for example, a predetermined card, and represents a predetermined shape and size by the card itself or a pattern displayed on the card.
- the tilt detection unit 22 detects the tilt of the camera 16 with respect to a predetermined plane by using the tilt sensor 13.
- the predetermined plane is a floor as an example.
- the still image capturing unit 23 When the still image capturing unit 23 tilts the camera 16 below the tilt threshold, the still image capturing unit 23 displays a still image including the foot FT placed in the foot placement region on the plane and the reference object placed on the plane. 16 is used to generate image data (step S102).
- the tilt threshold is a threshold related to the tilt of the camera 16, and is set in advance to a value that can obtain a desired accuracy as the dimension of the foot FT by correction based on the tilt with respect to image data captured by the camera 16.
- the calculation unit 24 extracts the area of the reference object and the foot FT in the image data, and based on the area of the reference object and the foot FT, The dimensions are calculated (step S103). For example, the length from the toe of the foot FT to the heel obtained from the shape and size of the region of the foot FT is calculated based on the shape and size indicated by the reference object.
- the processing of the calculation unit 24 includes the processing of the plane correction unit 25, the foot region detection unit 26, and the foot dimension calculation unit 27 as shown in FIG.
- the image data needs to have little distortion due to the tilt of the camera 16, but the mobile information device 10 such as a smartphone or a tablet terminal is fixed accurately and horizontally by hand. difficult. If the inclination of the camera 16 at the time of shooting is large, it is difficult to calculate the size of the foot FT with sufficient accuracy even if the image data is corrected.
- a still image is first shot in a state where the tilt of the camera 16 is within a range in which accuracy can be ensured by correction, and the obtained image data is corrected. It is possible to measure the dimension of the foot FT with few errors by the portable information device 10 that is held and operated.
- FIG. 4 is a flowchart showing an example of detailed processing for capturing a still image.
- the still image capturing unit 23 determines whether the tilt of the camera 16 is equal to or less than the tilt threshold based on the detection result of the tilt detection unit 22. It is determined whether or not (step S201).
- the still image capturing unit 23 displays on the touch panel display 15 that the capturing is not possible (step S202), and returns to step S201. Note that when the user performs a shooting operation on the touch panel display 15 in a shooting disabled state, the still image shooting unit 23 generates a warning sound from the speaker 14 indicating that shooting is not possible. Good.
- step S201 If the tilt of the camera 16 is equal to or smaller than the tilt threshold in step S201, the still image capturing unit 23 displays on the touch panel display 15 that the camera is ready to be captured (step S203), and the user touches the touch panel display 15. It is determined whether there is a shooting operation (step S204).
- the state incapable of photographing and the state in which photographing is possible may be displayed on the touch panel display 15 by the guide unit 21 or the inclination detecting unit 22 in accordance with an instruction from the still image photographing unit 23.
- the still image shooting unit 23 returns to step S201 and continues monitoring the tilt of the camera 16. If there is a photographing operation by the user, the still image photographing unit 23 photographs a still image with the camera 16 (step S205).
- FIG. 5 is a diagram illustrating an example of an image displayed on the touch panel display during shooting.
- the planar footprint shape is shown in the camera image for easy viewing, but in reality, the camera image shows legs in three dimensions as well as the feet.
- the guide unit 21 displays a foot position guide image 31 that positions the heel in the vicinity of the center in the front-rear direction in the camera image obtained by the camera 16. If the position of the camera 16 and the position of the heel are shifted in the front-rear direction, the size of the foot FT calculated from the image data is different from the size of the foot FT calculated from the image data due to the height of the bulging part behind the heel. An error may occur in a part.
- the camera 16 can be adjusted to the position of the heel in the front-rear direction by the guide based on the foot position guide image 31, so that the calculation error of the foot dimension due to the height of the heel can be suppressed. it can.
- the foot position guide image 31 includes a foot placement region 32, a vertical straight line 33, and horizontal straight lines 34a and 34b.
- the foot placement area 32 is on the front side of the entire area 30 photographed by the camera 16, and is approximately half the length of the entire area 30.
- the heel can be positioned in the vicinity of the center of the entire area 30 in the front-rear direction. Since the center of the entire region 30 is substantially in front of the camera 16, it is possible to naturally position the eyelid in front of the camera 16.
- the guide unit 21 displays the foot position guide image 31 on the right front side of the entire area 30 when shooting the right foot, and displays the foot position guide image 31 on the left front side of the entire area 30 when shooting the left foot.
- the reference object CD can be placed on the left side of the right foot so that both the right foot and the reference object CD can be stored in the image data in a natural shooting posture, and the position of the camera 16 in the front-rear direction is taken into account. Can be matched.
- the foot position guide image 31 includes a first straight line (longitudinal straight line 33) that matches the longest part of the foot FT, and two first movable lines that intersect the first straight line and are movable in the extending direction of the first straight line 33. 2 straight lines (lateral straight lines 34a and 34b). Then, the calculation unit 24 calculates the size of the foot based on the distance between the intersections of the two second straight lines 34 a and 34 b and the first straight line 33. By aligning the longest part of the foot FT with the first straight line 33 and aligning the second straight lines 34a, 34b with the front and rear ends (toe and heel) of the foot FT, It is possible to calculate the dimensions.
- the tilt detector 22 displays a tilt display image 35 on the touch panel display 15 that visually represents the tilt of the camera 16 detected by the tilt sensor 13 in real time. According to this, since the user can visually confirm the tilt of the camera 16 with the tilt display image 35, the angle of the camera 16 at the time of shooting can be determined.
- FIG. 6 is a diagram showing a display example of the tilt display image.
- the tilt detector 22 indicates that the still image cannot be captured in the tilt display image 35 and does not allow the camera 16 to capture a still image.
- a desired accuracy can be obtained as long as the tilt of the camera 16 is below a certain level.
- the desired accuracy can be obtained with certainty.
- FIG. 6A, 6B, and 6C show an inclination display image 35 simulating a round bubble level.
- the inclination of the portable information device 10 or the camera 16 is represented by the position of a bubble image 35a that simulates a bubble. If the bubble image 35a is positioned near the center of the tilt display image 35, it indicates that the portable information device 10 or the camera 16 is horizontal. In the state of FIG. 6A, the bubble image 35 a is greatly deviated from the center of the tilt display image 35. At this time, it is assumed that the tilt of the camera 16 is larger than the tilt threshold, and still image shooting is prohibited. For this reason, the display of the tilt display image 35 indicates that photographing is not possible. In the example of FIG. 6A, the tilt display image 35 is hatched.
- the bubble image 35a is displayed near the center of the tilt display image 35.
- the bubble image 35a is displayed at the center of the tilt display image 35.
- the tilt display image 35 indicates that the photographing is possible.
- the tilt display image 35 is not hatched, unlike the example of FIG.
- FIG. 7 is a flowchart of processing for calculating the dimensions of the foot.
- the calculation unit 24 includes a plane correction unit 25, a foot region detection unit 26, and a foot dimension calculation unit 27.
- the plane correction unit 25 corrects distortion due to the tilt of the camera in the image data based on the shape of the reference object CD in the image data (step S301).
- the foot area detection unit 26 detects the area of the foot FT in the image data after the plane correction by the plane correction unit 25 (step S302).
- the region of the foot FT can be specified based on the pixel value of each pixel in the image data.
- the foot dimension calculation unit 27 calculates the dimension of the foot based on the relative size of the foot FT region detected by the foot region detection unit 26 with respect to the reference object CD in the image data.
- FIG. 8 is a diagram illustrating a state in which planar correction is performed on image data.
- 8A and 8B show still images before and after correction.
- the reference object CD and the foot FT disposed in the foot placement region 32 are accommodated.
- FIG. 8 (A) shows a still image before correction, which is taken by the tilted camera 16.
- the tilt of the camera 16 is naturally equal to or less than the tilt threshold.
- the plane correction unit 25 recognizes the original shape and size of the reference object CD, and corrects the still image data so that the reference object CD in the still image has the original shape.
- the plane correction unit 25 may use, for example, an existing trapezoidal distortion correction technique.
- FIG. 8B shows a still image after correction. In the corrected still image, the distortion of the reference object CD is eliminated, and accordingly, the distortion of the foot FT area is also eliminated.
- the foot region detection unit 26 divides the foot placement region into a plurality of regions based on the pixel value of each pixel, and the center portion of the foot placement region 32
- the area of the foot FT may be a region formed by pixels having a difference from the pixel value in the central portion of the pixel value equal to or less than a predetermined value.
- the toes are separated from the feet, but actually, the portion of the feet including the toes becomes a continuous region.
- the nail portion of the foot FT has a pixel value different from other portions due to an artificial nail or pedicure. Considering this, the nail portion may be specified by the pattern of the foot shape, and the specified portion may be included in the region of the foot FT even if the pixel value is different.
- FIG. 9 is a diagram showing how the foot region is three-dimensionally corrected.
- the foot size calculation unit 27 calculates the foot FT based on the reference object CD, the region of the foot FT, the angle ⁇ with respect to the floor surface 43 of the straight line 42 connecting the camera 16 and the toe FTA, and the height H1 of the toe FTa.
- the dimension L2 is calculated.
- the foot dimension calculation unit 27 corrects the apparent dimension L1 of the area of the foot FT detected by the foot area detection unit 26 to the actual dimension L2 of the foot FT using Expression (1).
- L2 L1-H1 / tan ⁇ (1)
- the height H1 of the toe FTa may be a fixed value or a value proportional to the dimension L1.
- the height H1 is a fixed value, for example, it may be about 1.5 cm.
- the angle ⁇ can be easily calculated from the position of the pixel where the toe FTa is located.
- the guide unit 21 can be manually moved along the second straight line 34a by a user operation.
- the user can move the second straight line 34a by dragging on the touch panel display 15, for example.
- the guide unit 21 is a position where the change of the pixel value in the predetermined region including the part of the first straight line 33 and the toe FTa is equal to or greater than a predetermined pixel value change threshold.
- the position of the second straight line 34a can be accurately adjusted based on the change in the pixel value of the image data. .
- FIG. 10 is a diagram illustrating a state in which the toe line is manually aligned.
- the user aligns the second straight line (toe line) 34a with the toe FTa by dragging while watching the camera image on the touch panel display 15. Since the user aligns the second straight line 34a while visually observing, the toe FTa is not erroneously determined even if there is an artificial nail or pedicure. However, since it is a drag operation to the touch panel display 15, it is difficult to accurately align the second straight line 34a with the tip of the toe FTa.
- a limited area 32a including the toe FTa portion of the camera image is used.
- FIG. 11 is a diagram illustrating a state where the toe lines are automatically aligned.
- the guide unit 21 automatically moves to a position where the change in the pixel value is equal to or greater than a predetermined pixel value change threshold in the region 32a and closest to the current second straight line 34a. Let As a result, it is possible to eliminate an error generated when the second straight line 34a is manually moved in the previous step.
- both of the two second straight lines 34a and 34b are movable, but either one may be fixed and only the other may be movable.
- the second straight line 34b on the heel side may be fixed to the foot placement region 32 and only the second straight line 34a on the toe side may be moved. This makes it possible to more accurately match the position of the heel FTb and the position of the camera 16 in the front-rear direction.
- part of a human body can be measured by the process similar to this embodiment.
- the end on the wrist side is made to correspond to the heel FTb in this embodiment
- the end of the fingertip is made to correspond to the toe FTa in this embodiment.
- the camera 16 is aligned with the wrist end, and three-dimensional correction is performed on the fingertip side.
- the guide unit 21 superimposes a hand position guide image indicating a hand placement area, which is a hand placement area, on a camera image that is an image captured by the camera 16.
- the inclination detection unit 22 detects the inclination of the camera 16 with respect to a predetermined plane, for example, a table surface, by using the inclination sensor 13.
- the still image capturing unit 23 causes the camera 16 to display a still image including the hand placed in the order value area on the predetermined plane and the reference object CD placed on the plane.
- the calculation unit 24 calculates the size of the hand based on the reference object CD and the hand region in the image data.
- the dimension of the hand is a dimension of a part or all of a part such as the length of the entire hand, the length of the finger, and the thickness of the finger.
- the portable information device 10 it is possible to measure the dimensions of an article placed on the floor or table surface.
- the size of a shoe can be measured by the portable information device 10.
- the guide unit 21 superimposes a shoe position guide image indicating a shoe placement area, which is an area for placing shoes, on a camera image that is an image captured by the camera 16.
- the tilt detection unit 22 uses the tilt sensor 13 to detect the camera 16 with respect to a predetermined plane such as a floor surface or a table surface.
- the still image capturing unit 23 displays a still image including shoes placed in the shoe placement area on the plane and the reference object CD placed on the plane. 16 is used to generate image data.
- the calculation unit 24 calculates the shoe size based on the reference object CD and the shoe region in the image data.
- the size of the clothes can be measured by the portable information device 10.
- the guide unit 21 superimposes a clothes position guide image indicating a clothes arrangement area, which is an area where clothes are placed, on a camera image that is an image captured by the camera 16.
- the inclination detection unit 22 detects the inclination of the camera 16 with respect to a predetermined plane such as a floor surface or a table surface by using the inclination sensor 13.
- the still image capturing unit 23 displays a still image including clothes placed in the clothes placement area on the plane and the reference object CD placed on the plane. 16 is used to generate image data.
- the calculation unit 24 calculates the size of the shoe based on the reference object CD and the clothing region in the image data. In the case of general clothes, the height that needs to be taken into consideration for the foot or the like can be ignored, so that the three-dimensional correction by the foot dimension calculation unit 27 does not have to be performed as described above.
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Description
L2=L1-H1/tanθ …(1)
Claims (13)
- カメラと傾きセンサーと処理部とを有し、
前記処理部は、
足を置く領域である足配置領域を示す足位置ガイド画像を、前記カメラにより取り込まれる映像であるカメラ映像に重畳し、
前記傾きセンサーを利用することにより、所定の平面に対する前記カメラの傾きを検知し、
前記カメラの傾きが所定の傾き閾値以下であるとき、前記平面上で前記足配置領域に置かれた足と所定の形状および大きさを表し前記平面に置かれた基準物とを含む静止画を前記カメラにより撮影して画像データを生成し、
前記画像データ内の前記基準物と前記足の領域とに基づいて前記足の寸法を算出する、
携帯情報装置。 - 前記処理部は、前記カメラ映像において踵を前後方向の中央近傍に位置させる前記足位置ガイド画像を表示する、請求項1に記載の携帯情報装置。
- 前記足配置領域は、前記カメラで撮影される全体領域のうち前方側にあり、前記全体領域の略半分の長さである、請求項2に記載の携帯情報装置。
- 前記処理部は、右足を撮影するとき前記足位置ガイド画像を前記全体領域の右前方側に表示し、左足を撮影するとき前記足位置ガイド画像を前記全体領域の左前方側に表示する、請求項3に記載の携帯情報装置。
- 前記足位置ガイド画像は、足の最も長い部分を合わせる第1の直線と、前記第1の直線と交差し前記第1の直線の延びる方向に移動可能な2本の第2の直線と、を含み、
前記処理部は、2本の前記第2の直線の前記第1の直線との交点同士の距離に基づいて前記足の寸法を算出する、
請求項1に記載の携帯情報装置。 - 前記第2の直線は、ユーザ操作により手動で移動可能であり、かつ、画素値の変化が所定の画素値変化閾値以上ある前記第2の直線に最も近い位置に自動で移動可能である、請求項5に記載の携帯情報装置。
- 前記処理部は、前記傾きセンサーで検知される前記カメラの傾きを視覚的に表す傾き表示画像を表示する、
請求項1に記載の携帯情報装置。 - 前記処理部は、前記カメラの傾きが前記傾き閾値を超えているとき、前記傾き表示画像にて撮影不可の状態であることを表わすとともに、前記カメラによる静止画の撮影を許可しない、請求項7に記載の携帯情報装置。
- 前記処理部は、
前記画像データ内の前記基準物の形状に基づき前記画像データにおける前記カメラの傾きによる歪を補正し、
補正後の前記画像データにおける前記足の領域を検出し、
検出された前記足の領域についての前記画像データ内の前記基準物に対する相対的な大きさに基づいて前記足の寸法を算出する、
請求項1に記載の携帯情報装置。 - 前記処理部は、前記基準物と、前記足の領域と、前記カメラと爪先を結ぶ直線の前記平面に対する角度と、前記爪先の高さと、に基づいて、前記足の寸法を算出する、請求項9に記載の携帯情報装置。
- 前記処理部は、
足を置く領域である足配置領域を示す足位置ガイド画像を、前記カメラにより取り込まれる映像であるカメラ映像に重畳するガイド部と、
前記傾きセンサーを利用することにより、所定の平面に対する前記カメラの傾きを検知する傾き検知部と、
前記カメラの傾きが前記傾き閾値以下であるとき、前記平面上で前記足配置領域に置かれた足と所定の形状および大きさを表し前記平面に置かれた基準物とを含む静止画を前記カメラにより撮影して画像データを生成する静止画撮影部と、
前記画像データ内の前記基準物の形状に基づき前記画像データにおける前記カメラの傾きによる歪を補正する平面補正部と、
補正後の前記画像データにおける前記足の領域を検出する足領域検出部と、
検出された前記足の領域の大きさと前記画像データにおける前記基準物の大きさとに基づいて前記足の寸法を算出する足寸法算出部と、
を有する、請求項1に記載の携帯情報装置。 - カメラと傾きセンサーを備えた携帯情報装置による寸法測定方法であって、
ガイド手段が、足を置く領域である足配置領域を示す足位置ガイド画像を、前記カメラにより取り込まれる映像であるカメラ映像に重畳し、
傾き検知手段が、前記傾きセンサーを利用することにより、所定の平面に対する前記カメラの傾きを検知し、
静止画撮影手段が、前記カメラの傾きが所定の傾き閾値以下であるとき、前記平面上で前記足配置領域に置かれた足と所定の形状および大きさを表し前記平面に置かれた基準物とを含む静止画を前記カメラにより撮影して画像データを生成し、
計算手段が、前記画像データ内の前記基準物と前記足の領域とに基づいて前記足の寸法を算出する、
寸法測定方法。 - カメラと傾きセンサーを備えた携帯情報装置により実行する寸法測定プログラムであって、
足を置く領域である足配置領域を示す足位置ガイド画像を、前記カメラにより取り込まれる映像であるカメラ映像に重畳する手順と、
前記傾きセンサーを利用することにより、所定の平面に対する前記カメラの傾きを検知する手順と、
前記カメラの傾きが所定の傾き閾値以下であるとき、前記平面上で前記足配置領域に置かれた足と所定の形状および大きさを表し前記平面に置かれた基準物とを含む静止画を前記カメラにより撮影して画像データを生成する手順と、
前記画像データ内の前記基準物と前記足の領域とに基づいて前記足の寸法を算出する手順と、をコンピュータに実行させるための寸法測定プログラム。
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