JP3854599B2 - Foot type measuring instrument - Google Patents

Foot type measuring instrument Download PDF

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JP3854599B2
JP3854599B2 JP2003385232A JP2003385232A JP3854599B2 JP 3854599 B2 JP3854599 B2 JP 3854599B2 JP 2003385232 A JP2003385232 A JP 2003385232A JP 2003385232 A JP2003385232 A JP 2003385232A JP 3854599 B2 JP3854599 B2 JP 3854599B2
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foot
light
sole
transparent plate
footrest
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JP2004219404A (en
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勝也 松永
和則 志堂寺
武人 早見
裕二 塚本
和生 平川
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Kyushu University NUC
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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
    • A43D1/025—Foot-measuring devices comprising optical means, e.g. mirrors, photo-electric cells, for measuring or inspecting feet

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  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
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Description

本発明は、足裏各部の寸法や足裏形状を確認する際に足裏の測定を行う足型測定器に関する。   The present invention relates to a foot-type measuring instrument that measures the sole when checking the dimensions and sole shape of each part of the sole.

靴の選択にあたって靴のサイズを決定するとき、或いは医学体育学分野における健康状態や運動能力の分析等においては、足の各部の正確な寸法や足裏の形状を把握することが望まれている。従来より、足長、足幅、足囲の各寸法の測定は、スケール（定規）やメジャー（巻尺）を用いて手作業により行われているが、測定作業者の熟練を要するだけでなく、測定に時間がかかるために被測定者にとっても負担となっている。更に、熟練者であっても測定作業者の個人差によって測定結果にばらつきが生じる場合があり、手作業による測定ではその精度が不十分であった。また、スケール（定規）やメジャー（巻尺）による測定では足裏の輪郭形状や接地面部の形状、或いは足裏への体重のかかり具合等を正確に把握することが困難であった。   When selecting the size of a shoe when selecting a shoe, or analyzing the state of health and athletic ability in the field of medical physical education, it is desired to know the exact dimensions of each part of the foot and the shape of the sole. . Traditionally, measurements of foot length, foot width, and foot girth have been done manually using a scale (ruler) and a measure (tape), but not only the skill of the measurement operator is required, Since measurement takes time, it is a burden for the person to be measured. Furthermore, even a skilled person may have variations in measurement results due to individual differences among measurement workers, and the accuracy of measurement by manual work is insufficient. Further, it has been difficult to accurately grasp the contour shape of the sole, the shape of the ground contact surface, the weight applied to the sole, or the like by measurement using a scale (ruler) or a measure (tape).

そこで、特許文献１に見られるように、足裏を撮像してその画像から足裏の形状や各部の寸法を測定する足型測定器が知られている。この足型測定器は、足を載せる透明板の裏側から足裏をデジタルカメラで撮影するとき、足の側面の最も外側に張り出す部分に水平ビーム光（レーザー光線）を照射することにより、足裏外周の輪郭の明確な画像を得られるようにしたものである。しかし、この足型測定器においては、画像から足裏外周の輪郭形状を把握することはできても、足裏の接地面部の形状を把握することができず、足裏形状を把握するには不十分となる不都合がある。   Therefore, as can be seen in Patent Document 1, a foot-type measuring device that captures the sole and measures the shape of the sole and the dimensions of each part from the image is known. This foot type measuring instrument irradiates the sole of the foot with a horizontal beam light (laser beam) when photographing the sole with a digital camera from the back side of the transparent plate on which the foot is placed. An image with a clear outer contour can be obtained. However, in this foot type measuring instrument, even if the contour shape of the sole periphery can be grasped from the image, the shape of the ground contact surface portion of the sole cannot be grasped. There is an inconvenience that becomes insufficient.

一方、特許文献２に見られるように、足を載せる透明板の側面から光を入射し、透明板内部を反射しながら進む光を足裏に反射させ、透明板の裏側から足裏を撮像するものが知られている。このものでは、透明板に接触している部分（足裏の接地面部）のみが撮像されるが、足裏全周の形状は不明瞭となる。   On the other hand, as seen in Patent Document 2, light is incident from the side of the transparent plate on which the foot is placed, the light traveling while reflecting inside the transparent plate is reflected on the sole, and the sole is imaged from the back side of the transparent plate. Things are known. In this case, only the part in contact with the transparent plate (the contact surface part of the sole) is imaged, but the shape of the entire circumference of the sole becomes unclear.

そこで、特許文献１の足型測定器における前記透明板に、その側面から光を入射させることで、足裏外周の輪郭形状と足裏の接地面部の形状とを同時に撮像することが考えられるが、これによっても単に足裏全体が一層明るく照明されるに過ぎず、足裏外周の輪郭形状と足裏の接地面部の形状との境界を明確に確認できないために、足裏の形状を正確に把握することが困難となる不都合がある。   Thus, it is conceivable to simultaneously capture the contour shape of the outer periphery of the sole and the shape of the ground contact surface portion of the sole by allowing light to enter the transparent plate of the foot-type measuring instrument of Patent Document 1 from the side surface. This also simply illuminates the entire sole more brightly, and the boundary between the contour shape of the sole periphery and the shape of the ground contact surface of the sole cannot be clearly confirmed. There is a disadvantage that it is difficult to grasp.

また、特許文献１のように足裏を反射鏡に映して撮影する場合や足裏に対するデジタルカメラの撮影角度によっては画像に歪みが生じる場合があり、実際の足裏形状と画像から得られる足裏形状とが異なるために画像に基づく測定が不正確となる不都合がある。更に、この足型測定器では水平ビーム光を生成するためのレーザー光線発生装置等が必要となるので、高価で複雑な装置構成となる不都合がある。
特開２０００−２９６００５号公報 実開平１−１７８００６号公報 In addition, as disclosed in Patent Document 1, there is a case where an image is distorted depending on a case where a sole is projected and reflected by a reflecting mirror, or depending on a photographing angle of a digital camera with respect to the sole. Since the back shape is different, there is a disadvantage that the measurement based on the image becomes inaccurate. Furthermore, this foot-type measuring device requires a laser beam generator for generating horizontal beam light, and thus has the disadvantage of an expensive and complicated device configuration.
JP 2000-296005 A Japanese Utility Model Publication No. 1-178006

かかる不都合を解消して、本発明は、足裏の形状の明確な画像を得ることができて測定精度を向上することができるだけでなく、測定効率を向上して測定作業者及び被測定者の負担を軽減することができ、更には、装置構成を簡単として安価でコンパクトな足型測定器を提供することを目的とする。   In order to eliminate such inconvenience, the present invention can not only improve measurement accuracy by obtaining a clear image of the shape of the sole, but also improve measurement efficiency and improve the measurement operator and the measurement subject. It is another object of the present invention to provide a foot-type measuring instrument that can reduce the burden and that is simple and inexpensive and is compact.

かかる目的を達成するために、本発明は、足置き透明板上に載置された足を該足置き透明板の裏面側から撮像する撮像手段を備え、該撮像手段により得られる画像情報から足裏形状を計測する足型測定器において、足置き透明板の外周側端面から第１の光を導入すると共に、該第１の光と異なる色の第２の光を足の外周側面に照射する光照射手段を設け、前記撮像手段は、前記第１の光により照らされた足裏接地面部と、前記第２の光により照らされた足裏外周縁部とを同時に撮像することを特徴とする。   In order to achieve such an object, the present invention includes an imaging means for imaging a foot placed on a footrest transparent plate from the back side of the footrest transparent plate, and the foot information is obtained from image information obtained by the imaging means. In a foot-type measuring instrument for measuring the back shape, the first light is introduced from the outer peripheral side end surface of the footrest transparent plate, and the second light of a color different from the first light is applied to the outer peripheral side surface of the foot. A light irradiating means is provided, and the imaging means simultaneously images the sole grounding surface illuminated by the first light and the sole outer peripheral edge illuminated by the second light. .

足を足置き透明板上に載置したとき、足裏の一部が足置き透明板に密着する。この密着部分が足裏接地面部である。このとき、足置き透明板の外周側端面から第１の光を導入することにより、足置き透明板の内部を進行する第１の光が足裏接地面部に乱反射して足置き透明板の裏面側からは鮮明な足裏接地面部形状を得ることができる。一方、足の外周側面に第２の光を照射することにより、足置き透明板の裏面側からは鮮明な足裏外周縁部の輪郭形状を得ることができる。そして、第１の光と第２の光とは異なる色の光であるので、足裏接地面部と足裏外周縁部との境界が明確となり、撮像手段によって足裏の形状の明確な画像を得ることができて測定精度を向上することができる。   When the foot is placed on the footrest transparent plate, a part of the sole adheres to the footrest transparent plate. This close contact portion is the sole contact surface portion. At this time, by introducing the first light from the outer peripheral side end surface of the footrest transparent plate, the first light traveling inside the footrest transparent plate is irregularly reflected on the foot grounding surface portion and the back surface of the footrest transparent plate From the side, a clear foot sole contact surface shape can be obtained. On the other hand, by irradiating the outer peripheral side surface of the foot with the second light, a clear contour shape of the outer periphery of the sole can be obtained from the back side of the footrest transparent plate. Since the first light and the second light are different colors, the boundary between the sole contact surface and the outer periphery of the sole becomes clear, and a clear image of the shape of the sole is obtained by the imaging means. Measurement accuracy can be improved.

また本発明においては、外部の光を遮断した状態で前記足置き透明板及び該足置き透明板上の足を収容する足収容室を設け、前記足置き透明板上の足を介して該足置き透明板に対向する前記足収容室の天面を青色とし、前記光照射手段における前記第１の光を白色光とすると共に前記第２の光を赤色光とすることが好ましい。   In the present invention, the footrest transparent plate and a foot accommodation chamber for accommodating the foot on the footrest transparent plate in a state where external light is blocked are provided, and the foot is placed via the foot on the footrest transparent plate. It is preferable that the top surface of the foot chamber facing the placing transparent plate is blue, the first light in the light irradiation means is white light, and the second light is red light.

足収容室を設けたことにより外部の光を遮断した状態で撮像することができるので、第１の光と第２の光とが外部の光に影響されることなく足裏接地面部と足裏外周縁部とを明確に色分けすることができる。ここで、足の肌の色は、皮下血色の影響によりもともと赤色成分を多く含んでいる。このため、足の外周側面に赤色光を当てることで確実に足裏外周縁部の輪郭を赤色とすることができる。これにより、足収容室の天面を青色とし第２の光を赤色光とすることにより、画像においては背景を青色として赤色に照明された足裏外周縁部の輪郭を明確とすることができる。しかも、第１の光を白色光とすることで、足裏接地面部の肌の色の成分を含ませて足裏接地面部を黄白色（明るい黄色）とすることができ、画像においては足裏接地面部を赤色に照明された足裏外周縁部に対して特に目立たせることができる。   By providing the foot accommodation chamber, it is possible to take an image in a state where external light is blocked, so that the first light and the second light are not affected by the external light, and the sole grounding surface portion and the sole The outer peripheral edge can be clearly color-coded. Here, the skin color of the foot originally contains a lot of red components due to the influence of the subcutaneous blood color. For this reason, the contour of the outer periphery of the sole can be surely made red by applying red light to the outer peripheral side surface of the foot. Thereby, by making the top surface of the foot storage chamber blue and the second light red light, it is possible to clarify the contour of the outer periphery of the sole illuminated in red with the background blue. . Moreover, by making the first light white light, it is possible to include a component of the skin color of the sole contact surface portion to make the sole contact surface portion yellowish white (bright yellow). The ground contact surface portion can be made particularly conspicuous with respect to the outer peripheral edge portion of the sole illuminated in red.

このとき、前記光照射手段の一態様としては、単一の白色光源を有し、該光源の光を前記第１の光とすると共に、透過光を赤色とするフィルタを透過させた該光源の光を前記第２の光とすることが挙げられる。これにより、光源を単一として２色の光を生成することができ、装置の構成を簡単とすることができる。   At this time, as one aspect of the light irradiating means, the light source has a single white light source, the light from the light source is the first light, and the light that is transmitted through a filter that transmits the red light. It is mentioned that light is the second light. Thereby, it is possible to generate light of two colors with a single light source, and the configuration of the apparatus can be simplified.

また、本発明において、前記足収容室は、前記足置き透明板の外側全周に起立する側壁と、該側壁の上端を覆うカバーとによって構成され、該カバーには、足収容室に足を出し入れする開閉自在の出し入れ口が設けられていることを特徴とする。   Further, in the present invention, the foot accommodating chamber is constituted by a side wall standing on the entire outer periphery of the footrest transparent plate, and a cover that covers an upper end of the side wall, and the cover includes a foot in the foot accommodating chamber. An opening / closing port that can be opened and closed is provided.

このとき、前記カバーは、互いに重合された一対の伸縮自在の膜状部材で構成され、前記出し入れ口は、一方の膜状部材に形成された第１スリットと、他方の膜状部材に形成されて前記第１スリットに交差する方向に延びる第２スリットとを備えることが好ましい。カバーを伸縮自在の膜状部材により形成することにより出し入れ口から足収容室への足の出し入れが容易且つ迅速に行える。しかも、カバーを一対の膜状部材により構成し、第１スリットと第２スリットとが互いに交差して出し入れ口を形成しているので、足を貫通させたときに第１スリットの両端に生じた隙間が第２スリットの両側の膜状部材により覆われ、且つ、第２スリットの両端に生じた隙間が第１スリットの両側の膜状部材により覆われるので、足収容室内への外光漏れが確実に防止でき、外部の光に影響されることなく足裏の明確な画像を得ることができる。   At this time, the cover is composed of a pair of stretchable film-like members superposed on each other, and the entrance / exit is formed in the first slit formed in one film-like member and the other film-like member. And a second slit extending in a direction intersecting the first slit. By forming the cover with a stretchable film-like member, it is possible to easily and quickly insert and remove the foot from the access port into the foot storage chamber. In addition, since the cover is composed of a pair of film-like members, and the first slit and the second slit intersect with each other to form an entrance / exit, it occurs at both ends of the first slit when the foot is penetrated. Since the gap is covered by the film-like members on both sides of the second slit, and the gap formed at both ends of the second slit is covered by the film-like members on both sides of the first slit, external light leakage into the foot accommodating chamber is prevented. It can be surely prevented, and a clear image of the sole can be obtained without being affected by external light.

また、本発明においては、前記足置き透明板上に載置された足の側面の最も外側に張り出す部分と略同じ高さに位置され、且つ、前記足置き透明板上の足の外側に互いに足裏形状を計測する際に基準となる同一の間隔寸法を存して配設されて、前記撮像手段により足裏と共に撮像される４つの計測基準マークを備え、撮像手段により撮像された４つの計測基準マークに基づいて画像を較正し、該較正画像を撮像手段の画像情報とする較正処理手段を備えることを特徴とする。   Further, in the present invention, it is located at substantially the same height as the portion of the side surface of the foot placed on the footrest transparent plate and projects to the outermost side, and on the outer side of the foot on the footrest transparent plate. 4 provided with four measurement reference marks which are arranged with the same interval dimension as a reference when measuring the shape of the soles, and are imaged together with the soles by the imaging means. The image processing apparatus includes calibration processing means that calibrates an image based on one measurement reference mark and uses the calibration image as image information of an imaging means.

前記較正処理手段は４つの計測基準マークを基準として撮像手段により撮像された画像の歪みを修正する。即ち、４つの計測基準マークは同一の間隔寸法を存して配設されているので、画像に歪みが生じている場合には足裏と共に撮像された４つの計測基準マークの各間隔が同一とならない。そこで、較正処理手段は画像における４つの計測基準マークの各間隔が同一となるように画像を修正して較正画像を生成するので、この較正画像を足裏形状の測定に使用する画像情報とすることで、正確な足裏形状の測定を行うことができる。しかも、各計測基準マークは足置き透明板上に載置された足の側面の最も外側に張り出す部分と略同じ高さに位置されているため、足裏の輪郭を構成する足の側面の最も外側に張り出す部分と各計測基準マークとが、足置き透明板を透して共に同等に屈折して撮像される。これによって、前記較正処理手段は一層精度の高い較正画像を生成することができるので、より正確な足裏形状の測定を行うことができる。   The calibration processing unit corrects distortion of the image captured by the imaging unit with reference to the four measurement reference marks. That is, since the four measurement reference marks are arranged with the same interval dimension, when the image is distorted, the intervals of the four measurement reference marks imaged together with the sole are the same. Don't be. Therefore, the calibration processing unit generates the calibration image by correcting the image so that the intervals of the four measurement reference marks in the image are the same. Therefore, the calibration image is used as image information used for measuring the sole shape. Thus, it is possible to accurately measure the sole shape. In addition, each measurement reference mark is located at the same height as the outermost part of the side surface of the foot placed on the footrest transparent plate, so that the side surface of the foot constituting the contour of the sole The outermost projecting portion and each measurement reference mark are imaged by being refracted equally through the footrest transparent plate. Accordingly, the calibration processing unit can generate a calibration image with higher accuracy, and thus can measure the sole shape more accurately.

また、本発明においては、前記撮像手段の画像情報から足裏形状を演算計測する計測処理手段を備え、該計測処理手段は、前記画像情報における足裏の爪先側最先端から踵側最後端にわたる直線を基準線として該基準線の長さから足長を求め、該基準線の長さに応じて予め定められた該基準線上の第１の所定位置から該基準線の一側方に延ばした垂線が足裏画像の足裏外周縁部の輪郭と交わる第１の交点を検出すると共に、該基準線の長さに応じて予め定められた該基準線上の第２の所定位置から該基準線の他側方に延ばした垂線が足裏画像の足裏外周縁部の輪郭と交わる第２の交点を検出し、第１の交点と第２の交点との距離から足幅を求めることを特徴とする。   In the present invention, a measurement processing unit that calculates and measures a sole shape from image information of the imaging unit is provided, and the measurement processing unit extends from the tip of the foot toe side to the end of the heel side in the image information. The foot length is obtained from the length of the reference line using a straight line as a reference line, and extended from one first predetermined position on the reference line according to the length of the reference line to one side of the reference line. A first intersection point where the perpendicular line intersects the contour of the sole outer peripheral edge of the sole image is detected, and the reference line is determined from a second predetermined position on the reference line that is predetermined according to the length of the reference line. Detecting a second intersection where the perpendicular extending to the other side intersects with the contour of the outer periphery of the sole of the sole image, and obtaining the foot width from the distance between the first intersection and the second intersection And

本発明は、前記計測処理手段によって撮像手段の画像情報から足長及び足幅を測定することが容易に行える。一般に、爪先側最先端から踵側最後端までの長さが足長である。また、脛側中足点（第一中足骨頭、即ち足の親指の付け根の骨の***のうち、最も内側に飛び出している点）から腓側中足点（第五中足骨頭、即ち足の小指の付け根の骨の***のうち、最も外側に飛び出している点）までの長さが足幅である。従って、足裏の爪先側最先端から踵側最後端にわたる直線（基準線）を引くことで前記計測処理手段により基準線の長さから足長を容易に測定することができる。   In the present invention, the measurement processing means can easily measure the foot length and the foot width from the image information of the imaging means. Generally, the length from the tip of the toe side to the end of the heel side is the foot length. Also, from the shin-side metatarsal point (the first metatarsal head, that is, the point protruding to the innermost side of the bulge of the base of the toe), the heel-side metatarsal point (the fifth metatarsal head, that is, the foot) The length up to the outermost bulge of the bone at the base of the little finger is the foot width. Accordingly, by drawing a straight line (reference line) extending from the tip of the toe side of the sole to the heel side end, the measurement processing means can easily measure the foot length from the length of the reference line.

また、本発明者は、基準線からの垂線が脛側中足点を通るとき、基準線における垂線の位置が基準線の長さに対して略一定の割合を示す位置であり、基準線からの垂線が腓側中足点を通るとき、基準線における垂線の位置が基準線の長さに対して略一定の割合を示す位置であることを知見している。これに基づいて前記計測処理手段においては、基準線上の第１の所定位置から該基準線の一側方（例えば足の親指の付け根の骨の***側）に向かって垂線を延ばし、足裏画像の足裏外周縁部の輪郭と交わる第１の交点（例えば脛側中足点）を検出する。同じく、基準線上の第２の所定位置から該基準線の他側方（例えば足の小指の付け根の骨の***側）に向かって垂線を延ばし、足裏画像の足裏外周縁部の輪郭と交わる第２の交点（例えば腓側中足点）を検出する。こうして検出された第１の交点（例えば脛側中足点）と第２の交点（例えば腓側中足点）との距離から極めて容易に足幅を測定することができる。このように、本発明によれば、前記計測処理手段により人手を煩わせることなく迅速且つ容易に足長と足幅を測定することができる。   In addition, the present inventor is a position where when the perpendicular from the reference line passes through the shin side midfoot point, the position of the perpendicular in the reference line is a position indicating a substantially constant ratio with respect to the length of the reference line. When the vertical line passes through the heel side midfoot point, it is known that the position of the vertical line on the reference line is a position showing a substantially constant ratio with respect to the length of the reference line. Based on this, the measurement processing means extends a perpendicular line from a first predetermined position on the reference line toward one side of the reference line (for example, the protruding side of the bone at the base of the big toe), and the sole image A first intersection (for example, a tibial midfoot point) that intersects the contour of the outer periphery of the sole of the foot is detected. Similarly, a perpendicular line is extended from the second predetermined position on the reference line toward the other side of the reference line (for example, the protruding side of the bone at the base of the little toe), and the contour of the outer periphery of the sole of the sole image A second intersecting point (for example, a heel side midfoot point) is detected. The foot width can be measured very easily from the distance between the first intersection point thus detected (for example, the shin side midfoot point) and the second intersection point (for example, the heel side midfoot point). Thus, according to the present invention, it is possible to quickly and easily measure the foot length and foot width by the measurement processing means without bothering human hands.

本発明の一実施形態を図面に基づいて説明する。図１は本実施形態の足型測定器の概略構成を示す説明図、図２は足型測定器本体の縦断面説明図、図３は足収容室の内部を示す説明的平面図、図４は要部の拡大説明図、図５はカバーの構成を示す説明図、図６は本実施形態の足型測定器による測定作業を示すフローチャート、図７は較正画像の作成作業を示すフローチャート、図８は足裏の輪郭検出作業を示すフローチャート、図９は足裏接地面部の輪郭検出作業を示すフローチャート、図１０は足裏の画像を示す説明図、図１１はカバーの他の形態を示す説明図である。   An embodiment of the present invention will be described with reference to the drawings. 1 is an explanatory view showing a schematic configuration of a foot measuring instrument according to the present embodiment, FIG. 2 is a longitudinal sectional explanatory view of a foot measuring instrument body, FIG. 3 is an explanatory plan view showing the inside of a foot accommodating chamber, FIG. Is an enlarged explanatory view of the main part, FIG. 5 is an explanatory view showing the structure of the cover, FIG. 6 is a flowchart showing the measurement work by the foot type measuring device of this embodiment, FIG. 7 is a flowchart showing the creation work of the calibration image, 8 is a flowchart showing the contour detection operation of the sole, FIG. 9 is a flowchart showing the contour detection operation of the sole contact surface portion, FIG. 10 is an explanatory view showing an image of the sole, and FIG. 11 is an explanatory view showing another form of the cover. FIG.

本実施形態の足型測定器１は、図１に示すように、本体２と、パーソナルコンピュータ３（以下パソコン３という）とによって構成されている。本体２の内部には、図２に示すように、撮像手段４（デジタルカメラ）と、反射鏡５と、足置き透明板６とが設けられ、更に、足置き透明板６の周縁に沿って光照射手段７が、足置き透明板６の上部に４つの計測基準マーク８が設けられている。また、本体２の上部にはカバー９が設けられており、該カバー９には後述する足の出し入れ口１０が設けられている。   As shown in FIG. 1, the foot-type measuring instrument 1 of the present embodiment includes a main body 2 and a personal computer 3 (hereinafter referred to as a personal computer 3). As shown in FIG. 2, an imaging means 4 (digital camera), a reflecting mirror 5, and a footrest transparent plate 6 are provided inside the main body 2, and further along the periphery of the footrest transparent plate 6. The light irradiation means 7 is provided with four measurement reference marks 8 on the upper part of the footrest transparent plate 6. Further, a cover 9 is provided on the upper portion of the main body 2, and a foot outlet / outlet 10 described later is provided in the cover 9.

前記足置き透明板６は、高い強度を持つ強化透明ガラスにより両足が載置可能な広さを有する矩形状に形成されており、本体２の周壁内部に設けられた支持部１１により略水平に支持されている。本体２の内部は外部の光が遮断された状態とされており、本体２の内部の足置き透明板６の上方空間は足を収容する足収容室１２とされている。   The footrest transparent plate 6 is formed in a rectangular shape having a width on which both feet can be placed by reinforced transparent glass having high strength, and is substantially horizontal by a support portion 11 provided inside the peripheral wall of the main body 2. It is supported. The inside of the main body 2 is in a state in which external light is blocked, and the space above the footrest transparent plate 6 inside the main body 2 is a foot accommodating chamber 12 for accommodating a foot.

前記反射鏡５は、足置き透明板６の下方に所定角度傾斜され、足置き透明板６に載置された足裏を、該足置き透明板６の裏面側から撮像手段４に向かって反射する。   The reflecting mirror 5 is inclined at a predetermined angle below the footrest transparent plate 6 and reflects the sole placed on the footrest transparent plate 6 from the back surface side of the footrest transparent plate 6 toward the imaging means 4. To do.

撮像手段４は、図１に示すように、本発明の較正処理手段及び計測処理手段として採用した前記パソコン３に接続されている。なお、パソコン３には足裏の画像や足裏の測定結果を印刷するプリンタ１３が接続されている。   As shown in FIG. 1, the imaging means 4 is connected to the personal computer 3 employed as the calibration processing means and the measurement processing means of the present invention. The personal computer 3 is connected to a printer 13 for printing the sole image and the measurement result of the sole.

前記光照射手段７は、図２及び図３に示すように、足置き透明板６の側縁に対向するように配設された白色蛍光管１４と、足置き透明板６の側縁に沿った上面に立設された光透過性の赤色アクリル板１５とによって構成されている。赤色アクリル板１５は透過光を赤色とするフィルタとして採用するものである。図４に示すように、白色蛍光管１４を点灯させると、足置き透明板６の外周側端面から足置き透明板６の内部に入射された白色蛍光管１４の光Ｌ１（第１の光）が、足置き透明板６の上下面を反射しつつ進んで行く。そして、足置き透明板６上に接している足裏接地面部に光Ｌ１の一部が乱反射することで足置き透明板６の下面から放射され、足裏接地面部の形状が浮き上がる。一方、赤色アクリル板１５を透過した光Ｌ２（第２の光）は、足の側面に照射されて足裏接地面部以外の足裏（足裏外周縁部）に当る。足はもともと赤色成分を含んでいるので、足の側面に赤色の光Ｌ２（第２の光）が照射されることで、足裏外周縁部が確実に赤色とされる。このとき、足裏接地面部は光Ｌ１（第１の光）が白色であることによって、肌の色の影響を受けて黄白色（明るい黄色）に照らされ、足裏接地面部の黄色と足裏外周縁部の赤色とで明確に色分けされて照明される。   As shown in FIGS. 2 and 3, the light irradiation means 7 includes a white fluorescent tube 14 disposed so as to face the side edge of the footrest transparent plate 6, and the side edge of the footrest transparent plate 6. And a light-transmitting red acrylic plate 15 erected on the upper surface. The red acrylic plate 15 is used as a filter that makes transmitted light red. As shown in FIG. 4, when the white fluorescent tube 14 is turned on, the light L <b> 1 (first light) of the white fluorescent tube 14 incident on the inside of the footrest transparent plate 6 from the outer peripheral side end face of the footrest transparent plate 6. However, it proceeds while reflecting the upper and lower surfaces of the footrest transparent plate 6. Then, a part of the light L1 is diffusely reflected on the sole ground contact surface portion in contact with the foot rest transparent plate 6 to be radiated from the lower surface of the foot rest transparent plate 6, and the shape of the sole ground contact surface is lifted. On the other hand, the light L2 (second light) transmitted through the red acrylic plate 15 is irradiated on the side surface of the foot and hits the sole (outer periphery of the sole) other than the sole grounding surface. Since the foot originally contains a red component, the outer peripheral edge of the sole is reliably made red by irradiating the side surface of the foot with red light L2 (second light). At this time, since the light L1 (first light) is white, the sole contact surface is illuminated with yellowish white (bright yellow) under the influence of the skin color. Illumination is clearly color-coded with the red color at the outer periphery.

前記カバー９は、図５（ａ）乃至図５（ｃ）に示すように、互いに重合された一対の膜状部材９ａ，９ｂによって構成されている。膜状部材９ａ，９ｂは、遮光性を有し且つ弾性を有して伸縮自在の材料により形成され、少なくとも下面（内側面）が青色とされている。   As shown in FIGS. 5A to 5C, the cover 9 is composed of a pair of film-like members 9a and 9b superposed on each other. The film-like members 9a and 9b are made of a light-shielding, elastic and elastic material, and at least the lower surface (inner surface) is blue.

また、図５（ｂ）に示すように、上側の膜状部材９ａには、足の前後方向に交差する方向に延びる一対の第１スリット１０ａが形成されている。該第１スリット１０ａは足が貫通自在となる長さを有する切り込みとされている。図５（ｃ）に示すように、下側の膜状部材９ｂには、足の前後方向に沿って延びる一対の第２スリット１０ｂが形成されている。該第２スリット１０ｂは、図５（ａ）に示すように、両膜状部材９ａ，９ｂが互いに重合したときに第１スリット１０ａに交差する位置に設けられており、足が貫通自在となる長さを有する切り込みとされている。即ち、第１スリット１０ａと第２スリット１０ｂとによって足の出し入れ口１０が構成されており、足の出し入れ時には第１スリット１０ａと第２スリット１０ｂとが容易に開口する。また、足が足収容室１２内にあるときには（図２参照）、第１スリット１０ａと第２スリット１０ｂとは互いに交差する方向に復元弾性により閉じるので、第２スリット１０ｂの両端側に隙間が形成されても上側の膜状部材９ａにより覆われ、同じく第１スリット１０ａの両端側に隙間が形成されても下側の膜状部材９ｂにより閉じられて、外部の光が足収容室１２内へ漏れることが防止される。更に、足置き透明板６上に足を載せる際には第１スリット１０ａを目標にして出し入れ口１０に足を貫通させることができる。   Further, as shown in FIG. 5B, the upper film-like member 9a is formed with a pair of first slits 10a extending in a direction intersecting the front-rear direction of the foot. The first slit 10a is a cut having a length that allows the foot to pass therethrough. As shown in FIG. 5C, a pair of second slits 10b extending along the front-rear direction of the foot is formed in the lower film-like member 9b. As shown in FIG. 5A, the second slit 10b is provided at a position that intersects the first slit 10a when the two film-like members 9a and 9b are overlapped with each other, so that the foot can pass therethrough. It is a notch having a length. That is, the first slit 10a and the second slit 10b constitute a foot entrance / exit 10, and the first slit 10a and the second slit 10b are easily opened when the foot is in / out. Further, when the foot is in the foot storage chamber 12 (see FIG. 2), the first slit 10a and the second slit 10b are closed by restoring elasticity in the direction intersecting each other, so that there is a gap between both ends of the second slit 10b. Even if it is formed, it is covered by the upper film-like member 9a, and even if a gap is formed at both ends of the first slit 10a, it is closed by the lower film-like member 9b, so that external light is transmitted into the foot storage chamber 12. Leakage is prevented. Furthermore, when putting a foot on the footrest transparent plate 6, the foot can be passed through the entrance 10 with the first slit 10 a as a target.

前記計測基準マーク８は、緑色のＬＥＤ（発光ダイオード）であって、図３に示すように、足置き透明板６の四隅部に設けられている。各計測基準マーク８の互いに隣り合うもの同士の間隔寸法は全て等しく、本実施形態においては、夫々３００mmとされている。また、図２に示すように、各計測基準マーク８は、足置き透明板６に載置された足の側面の最も外側に張り出している部分と略同じ高さ寸法Ｈに（即ち、ＬＥＤの発光部が足置き透明板６からの距離Ｈを存して）設けられている。こうすることにより、後述するように、計測基準マーク８からの光は、足裏の領域を検出する際に照明される足裏の輪郭と同様に屈折して足置き透明板６を透過するので、屈折による撮像精度の低下を防止することができる。なお、本発明者は各種試験により、高さ寸法Ｈは５〜２０mmに設定されるのが好ましいことを知見している。そして、計測基準マーク８はその形状に限定はないが、半球型のＬＥＤを用いる場合、該半球面側である先端を下向きにし発光部を上側にして配置する。このとき、半球型のＬＥＤの半径が足の側面の最も外側に張り出している部分の高さ寸法と等しいものであれば、図２に示すように、ＬＥＤを足置き透明板６に置くだけで、高さ寸法Ｈを足の側面の最も外側に張り出している部分の高さに極めて容易に合わせることができる。   The measurement reference mark 8 is a green LED (light emitting diode), and is provided at the four corners of the footrest transparent plate 6 as shown in FIG. The intervals between the adjacent measurement reference marks 8 are all equal, and in this embodiment, each measurement reference mark 8 is 300 mm. Further, as shown in FIG. 2, each measurement reference mark 8 has substantially the same height dimension H as that of the outermost portion of the side surface of the foot placed on the footrest transparent plate 6 (that is, the LED). A light emitting part is provided (with a distance H from the footrest transparent plate 6). By doing so, as will be described later, the light from the measurement reference mark 8 is refracted and transmitted through the footrest transparent plate 6 in the same manner as the contour of the sole illuminated when detecting the sole area. Therefore, it is possible to prevent a decrease in imaging accuracy due to refraction. In addition, this inventor has discovered that it is preferable to set the height dimension H to 5-20 mm by various tests. The shape of the measurement reference mark 8 is not limited, but when a hemispherical LED is used, the measurement reference mark 8 is arranged with the tip which is the hemispherical side facing down and the light emitting portion facing upward. At this time, if the radius of the hemispherical LED is equal to the height dimension of the outermost portion of the side surface of the foot, the LED is simply placed on the footrest transparent plate 6 as shown in FIG. The height dimension H can be very easily adjusted to the height of the portion of the side surface of the foot that protrudes to the outermost side.

次に、以上の構成による本実施形態の足型測定器１の作動を説明する。図２に示すように、足置き透明板６に足Ｆを載せ、撮像手段４（デジタルカメラ）を作動させて、反射鏡５を介して前記計測基準マーク８を含む足裏を撮像する。撮像が完了すれば、被測定者は足を足収容室１２から出してよい。撮像手段４によって撮像された画像はパソコン３に取り込まれ、パソコン３によって較正処理及び計測処理等が行われる。撮像された画像には、背景が青色とされ、光照射手段７により色分けされた左右の足裏と４つの計測基準マーク８が写り込んでいる。   Next, the operation of the foot-type measuring instrument 1 of the present embodiment having the above configuration will be described. As shown in FIG. 2, the foot F is placed on the footrest transparent plate 6, and the imaging means 4 (digital camera) is operated to image the sole including the measurement reference mark 8 through the reflecting mirror 5. If the imaging is completed, the person to be measured may take his / her foot out of the foot chamber 12. An image picked up by the image pickup means 4 is taken into the personal computer 3, and calibration processing and measurement processing are performed by the personal computer 3. In the captured image, the background is blue, and the left and right soles and the four measurement reference marks 8 color-coded by the light irradiation means 7 are reflected.

ここで、パソコン３による処理を説明すれば、図６に示すように、先ず、撮像手段２からの画像を読み込み（ＳＴＥＰ１）、読み込んだ画像を４つの計測基準マーク７に基づいて較正する（ＳＴＥＰ２）。これにより、画像の歪みが修正された較正画像が得られる。   Here, the processing by the personal computer 3 will be described. As shown in FIG. 6, first, an image from the imaging means 2 is read (STEP 1), and the read image is calibrated based on the four measurement reference marks 7 (STEP 2). ). Thereby, a calibration image in which the distortion of the image is corrected is obtained.

ＳＴＥＰ２における較正画像の形成について更に詳しく説明すれば、図７に示すように、先ず、読み込んだカラー画像（以下元画像という）をＳＴＥＰ２−１でピクセル毎にＲＧＢ値（赤、緑、青）をＨＳＢ値（色相、彩度、明度）に変換する。次いで、計測基準マーク７が緑色であることにより、ＳＴＥＰ２−２でピクセルのＨＳＢ値に基づいて緑色か否かを判断し、ピクセルが緑色であればＳＴＥＰ２−３で該ピクセルを白に変換し、ピクセルが緑色以外の色であればＳＴＥＰ２−４で該ピクセルを黒に変換する。ＳＴＥＰ２−２における緑色の検出条件は計測基準マーク８の色に応じて定められ、本実施形態においてはＨＳＢ値がＢ≧６０、Ｓ≧７０、１２０°≧Ｈ≧９０°であるものを緑色（計測基準マーク８の色）とした。そして、ＳＴＥＰ２−５により画像を構成する全てのピクセルについて白黒変換が行われ、ＳＴＥＰ２−６で各計測基準マーク８による２値画像が形成される。次いで、ＳＴＥＰ２−７で２値画像から４つの計測基準マーク８の位置を検出し、ＳＴＥＰ２−８で４つの計測基準マーク８の夫々の重心点を検出する。続いて、ＳＴＥＰ２−９で４つの計測基準マーク８の重心点を四隅として、元画像のトリミングを行う。更に、ＳＴＥＰ２−１０でトリミング後の元画像の各重心点の間隔を均一に修正する。これにより、撮影時の画像の歪みが修正された較正画像（背景が青色とされ光照射手段７により色分けされた左右の足裏が写り込んでいるカラー画像）を形成することができる（図１０参照）。   If the calibration image formation in STEP 2 is described in more detail, as shown in FIG. 7, first, the read color image (hereinafter referred to as the original image) is converted into RGB values (red, green, blue) for each pixel in STEP 2-1. Convert to HSB value (hue, saturation, brightness). Next, if the measurement reference mark 7 is green, in STEP2-2, it is determined whether or not it is green based on the HSB value of the pixel. If the pixel is green, the pixel is converted to white in STEP2-3. If the pixel is a color other than green, the pixel is converted to black in STEP 2-4. The detection condition of green in STEP2-2 is determined according to the color of the measurement reference mark 8, and in this embodiment, the HSB values of B ≧ 60, S ≧ 70, 120 ° ≧ H ≧ 90 ° are green ( The color of the measurement reference mark 8). Then, in STEP 2-5, black and white conversion is performed on all the pixels constituting the image, and in STEP 2-6, a binary image is formed with each measurement reference mark 8. Next, the positions of the four measurement reference marks 8 are detected from the binary image in STEP 2-7, and the barycentric points of the four measurement reference marks 8 are detected in STEP 2-8. Subsequently, in STEP 2-9, the original image is trimmed with the four gravity reference points of the four measurement reference marks 8 as the four corners. Further, in STEP 2-10, the interval between the barycentric points of the original image after trimming is corrected uniformly. Thereby, it is possible to form a calibration image (color image in which the background is blue and the right and left soles are color-coded by the light irradiation means 7) in which the distortion of the image at the time of shooting is corrected (FIG. 10). reference).

次いで測定作業者は、図６に示すように、画面に表示された左右の足裏の画像の夫々に基準線１６を入力する（ＳＴＥＰ３）。図１０に示すように、該基準線１６は、足裏の第２指爪先を通って踵側最後端に至る直線である。   Next, as shown in FIG. 6, the measurement operator inputs a reference line 16 to each of the left and right sole images displayed on the screen (STEP 3). As shown in FIG. 10, the reference line 16 is a straight line that passes through the second fingernail tip of the sole and reaches the heel side rear end.

続いて、図６に示すように、ＳＴＥＰ２により形成された較正画像に基づいて足裏の輪郭を検出する（ＳＴＥＰ４）。即ち、ＳＴＥＰ４においては、図８に示すように、較正画像をＳＴＥＰ４−１でピクセル毎にＲＧＢ値をＨＳＢ値に変換する。次いで、ＳＴＥＰ４−２でピクセルのＨＳＢ値に基づいて足裏の領域か否かを判断し、ピクセルが足裏の領域を示す（黄色成分〜赤色成分を含む）ＨＳＢ値であればＳＴＥＰ４−３で該ピクセルを白に変換し、ピクセルが足裏の領域を示すＨＳＢ値以外の色（背景色）であればＳＴＥＰ４−４で該ピクセルを黒に変換する。なお、ＳＴＥＰ４−２における足裏の領域の検出条件は、ＨＳＢ値が０≦Ｂ≦１００、且つ１５≦Ｓ≦１００、且つＨ≦９０°又はＨ≧３１４°である場合、１５≦Ｂ≦５５、且つ２１≦Ｓ≦９８、且つＨ＜２００°又はＨ≧３１２°である場合、５５≦Ｂ≦１００、且つ０≦Ｓ≦９４、且つ０≦Ｈ≦１１０°である場合の何れかであるときに足裏の領域とする。次いで、ＳＴＥＰ４−５により画像を構成する全てのピクセルについて前記条件による白黒変換が行われる。そして、ＳＴＥＰ４−６で左右夫々の足裏の領域の輪郭を抽出し、ＳＴＥＰ４−７で較正画像の左右夫々の足裏の輪郭に沿って輪郭線１７（図１０参照）を重ねる。ここで、足裏の領域の検出条件は、黄色成分〜赤色成分を含むものを選択するが、足はもともと赤色成分を含んでいることに加えて足の側面に赤色の光Ｌ２が照射されているので、足裏外周縁部の輪郭が確実に赤色とされ、輪郭線１７（図１０参照）が容易に抽出される。   Subsequently, as shown in FIG. 6, the contour of the sole is detected based on the calibration image formed in STEP 2 (STEP 4). That is, in STEP 4, as shown in FIG. 8, the calibration image is converted into an HSB value for each pixel in STEP 4-1. Next, in STEP 4-2, it is determined whether or not the region is the sole region based on the HSB value of the pixel. If the pixel indicates an HSB value (including a yellow component to a red component) indicating the sole region, STEP 4-3. The pixel is converted to white, and if the pixel is a color (background color) other than the HSB value indicating the sole region, the pixel is converted to black in STEP 4-4. Note that the detection condition of the sole region in STEP4-2 is 15 ≦ B ≦ 55 when the HSB value is 0 ≦ B ≦ 100, 15 ≦ S ≦ 100, and H ≦ 90 ° or H ≧ 314 °. And 21 ≦ S ≦ 98 and H <200 ° or H ≧ 312 °, 55 ≦ B ≦ 100, 0 ≦ S ≦ 94, and 0 ≦ H ≦ 110 °. Sometimes the sole area. Next, in STEP 4-5, black and white conversion under the above conditions is performed for all pixels constituting the image. Then, in STEP 4-6, the contours of the left and right sole regions are extracted, and in STEP 4-7, contour lines 17 (see FIG. 10) are overlapped along the contours of the left and right soles of the calibration image. Here, the detection condition of the sole region is selected to include a yellow component to a red component, but in addition to the foot originally including a red component, the side of the foot is irradiated with red light L2. Therefore, the contour of the outer peripheral edge portion of the sole is surely made red, and the contour line 17 (see FIG. 10) is easily extracted.

続いて、図６に示すように、較正画像から足裏接地面部の輪郭を検出する（ＳＴＥＰ５）。ＳＴＥＰ５においては、図９に示すように、先ず、較正画像をＳＴＥＰ５−１でピクセル毎にＲＧＢ値をＨＳＢ値に変換する。次いで、ＳＴＥＰ５−２でピクセルのＨＳＢ値に基づいて足裏接地面部の領域か否かを判断し、ピクセルが足裏接地面部の領域を示す（黄色成分を含む）ＨＳＢ値であればＳＴＥＰ５−３で該ピクセルを白に変換し、ピクセルが足裏接地面部の領域を示すＨＳＢ値以外の色であればＳＴＥＰ５−４で該ピクセルを黒に変換する。なお、ＳＴＥＰ５−２における足裏接地面部の領域の検出条件は、足裏接地面部が光Ｌ１（第１の光）によって黄白色とされていることにより、ＨＳＢ値が４７≦Ｂ≦１００、且つ０≦Ｓ≦１００、且つ５３≦Ｈ≦１１４°である場合に足裏接地面部の領域とする。次いで、ＳＴＥＰ５−５により画像を構成する全てのピクセルについて前記条件による白黒変換が行われる。そして、ＳＴＥＰ５−６で左右夫々の足裏接地面部の領域の輪郭を抽出し、ＳＴＥＰ５−７で較正画像の左右夫々の足裏の輪郭に沿って輪郭線１８（図１０参照）を重ねる。   Subsequently, as shown in FIG. 6, the contour of the sole contact surface portion is detected from the calibration image (STEP 5). In STEP5, as shown in FIG. 9, first, the RGB value is converted into the HSB value for each pixel in STEP5-1 of the calibration image. Next, in STEP5-2, it is determined based on the HSB value of the pixel whether or not it is a region of the foot contact surface, and if the pixel is an HSB value (including a yellow component) indicating the region of the foot contact surface, STEP5-3. In step 5-4, the pixel is converted to white. If the pixel is in a color other than the HSB value indicating the area of the sole ground contact surface, the pixel is converted to black. Note that the detection condition of the area of the foot contact surface in STEP5-2 is that the foot contact surface is made yellowish white by the light L1 (first light), so that the HSB value is 47 ≦ B ≦ 100, and When 0 ≦ S ≦ 100 and 53 ≦ H ≦ 114 °, it is set as the region of the sole contact surface portion. Next, in Step 5-5, black and white conversion is performed on all the pixels constituting the image under the above conditions. Then, in STEP 5-6, the contours of the regions of the left and right sole ground contact surface portions are extracted, and in STEP 5-7, contour lines 18 (see FIG. 10) are superimposed along the contours of the left and right soles of the calibration image.

これによって、図６に示すＳＴＥＰ２により形成された較正画像には、ＳＴＥＰ３において入力された基準線１６に加えて、ＳＴＥＰ４において生成された足裏の輪郭線１７及びＳＴＥＰ５において生成された足裏接地面部の輪郭線１８が描き込まれ、図１０に示すように、測定用足裏画像１９がパソコン３の画面に表示される。   Accordingly, in the calibration image formed by STEP2 shown in FIG. 6, in addition to the reference line 16 input in STEP3, the contour line 17 of the sole generated in STEP4 and the sole contact surface portion generated in STEP5 are included. The contour line 18 is drawn, and the sole image 19 for measurement is displayed on the screen of the personal computer 3 as shown in FIG.

なお、前記基準線１６は、図１０に示すように、測定用足裏画像１９において足裏の第２指爪先を通って踵側最後端に至る直線であることは既に述べたが、足裏の第２指爪先側の基準線１６の一端は、例えば、第２指が最先端であるときには、第２指爪先の輪郭線１７との交点２０の位置にあり、第１指が最先端であるときには、第２指爪先の輪郭線１７の外方に延びて第１指の最先端に対応する位置となる。   As already shown in FIG. 10, the reference line 16 is a straight line passing through the second toe of the sole and reaching the heel side end in the measurement sole image 19, as shown in FIG. One end of the reference line 16 on the second fingernail tip side is, for example, at the position of the intersection 20 with the contour line 17 of the second fingernail tip when the second finger is at the leading edge, and the first finger is at the leading edge. In some cases, it extends to the outside of the contour line 17 of the second fingernail tip and becomes a position corresponding to the forefront of the first finger.

そして、パソコン３においては、図６に示すように、先ず、各基準線１６の長さから左右の足長の寸法が測定される（ＳＴＥＰ６）。このときの足長の寸法は、４つの計測基準マーク８の間隔寸法を基準として測定される。   In the personal computer 3, as shown in FIG. 6, first, the lengths of the left and right feet are measured from the length of each reference line 16 (STEP 6). The dimension of the foot length at this time is measured with reference to the distance dimension between the four measurement reference marks 8.

次いで、基準線１６に基づいて足幅寸法が測定され（ＳＴＥＰ７）、足幅に基づいて足囲寸法が測定される（ＳＴＥＰ８）。ＳＴＥＰ７においては、図１０に示すように、基準線１６上の第１の所定位置（踵側最後端から基準線１６の長さの７２．４％の位置）から足の親指の付け根の骨の***側に向かって垂線２１を延ばし、足裏画像１９の足裏の輪郭線１７と交わる点を脛側中足点２２とする。同時に、基準線１６上の第２の所定位置（踵側最後端から基準線１６の長さの６３．２％の位置）から足の小指の付け根の骨の***側に向かって垂線２３を延ばし、足裏画像の足裏の輪郭線１７と交わる点を腓側中足点２４とする。そして、脛側中足点２２と腓側中足点２４とを結んだ直線２５の長さから足幅寸法が測定される。足幅寸法が測定されたことにより、図６に示すＳＴＥＰ８においては、足幅寸法／０．４１３から足囲寸法を算出する。   Next, the foot width dimension is measured based on the reference line 16 (STEP 7), and the foot circumference dimension is measured based on the foot width (STEP 8). In STEP 7, as shown in FIG. 10, from the first predetermined position on the reference line 16 (position 72.4% of the length of the reference line 16 from the heel end), the bone at the base of the toe A perpendicular line 21 is extended toward the bulging side, and a point that intersects the contour line 17 of the sole of the sole image 19 is defined as a shin side midfoot point 22. At the same time, the vertical line 23 is extended from the second predetermined position on the reference line 16 (position of 63.2% of the length of the reference line 16 from the heel end) toward the bulging side of the base of the little toe. A point that intersects the contour line 17 of the sole of the sole image is defined as a heel side middle foot point 24. Then, the foot width dimension is measured from the length of the straight line 25 connecting the shin side midfoot point 22 and the heel side midfoot point 24. When the foot width dimension is measured, the foot circumference dimension is calculated from the foot width dimension / 0.413 in STEP 8 shown in FIG.

続いて、基準線１６に基づいて踵幅寸法が測定される（ＳＴＥＰ９）。ＳＴＥＰ９においては、図１０に示すように、基準線１６上の第３の所定位置（踵側最後端から基準線１６の長さの１６％の位置）に直交する直線２６を延ばし、足裏画像の足裏の輪郭線１７と交わる２点２７，２８の間隔から踵幅寸法が測定される。   Subsequently, the heel width dimension is measured based on the reference line 16 (STEP 9). In STEP 9, as shown in FIG. 10, a straight line 26 orthogonal to a third predetermined position on the reference line 16 (a position that is 16% of the length of the reference line 16 from the rearmost end on the heel side) is extended, and the sole image is displayed. The width of the heel is measured from the distance between two points 27 and 28 that intersect the contour line 17 of the sole of the foot.

更に、図６に示すように、基準線１６に基づいて不踏部寸法の測定（ＳＴＥＰ１０）、第１址側角度及び第５址側角度の測定（ＳＴＥＰ１１）、足裏全体に対する接地面積率の測定（ＳＴＥＰ１２）が可能である。ＳＴＥＰ１０における不踏部寸法の測定は、図１０に示すように、基準線１６上の第４の所定位置（踵側最後端から基準線１６の長さの５５％の位置）に直交する直線２９を延ばし、基準線１６から足裏接地面部の輪郭線１８の交点３０までの距離から測定される。このとき、交点３０が足の外側（足の小指側の方向）にあるときにはプラスの値とし、交点３０が足の内側（足の親指側の方向）にあるときにはマイナスの値として土踏まずの状態を確認することができる。ＳＴＥＰ１１における第１址側角度の測定は、図１０に示すように、先ず、図６示のＳＴＥＰ９において検出された交点２７と、図６示のＳＴＥＰ７において検出された脛側中足点２２とを通る直線３１を描き、次いで、基準線１６上の第５の所定位置（踵側最後端から基準線１６の長さの９０％の位置）から足の親指に向かって垂線３２を延ばし、足裏画像の足裏の輪郭線１７と交わる点３３と、図６示のＳＴＥＰ７において検出された脛側中足点２２とを通る直線３４を描く。このときの直線３１と直線３４との角度θ１を測定して第１址側角度とする。同様にして描かれた直線３５と直線３６との角度θ２を測定することで第５址側角度を確認することができる。ＳＴＥＰ１２における足裏全体に対する接地面積率の測定は、ＳＴＥＰ４において検出された足裏の領域と、ＳＴＥＰ５において検出された足裏接地面部の領域とから算出される。   Furthermore, as shown in FIG. 6, the measurement of the size of the tread portion based on the reference line 16 (STEP 10), the measurement of the first heel side angle and the fifth heel side angle (STEP 11), and the contact area ratio of the entire sole Measurement (STEP 12) is possible. As shown in FIG. 10, the measurement of the size of the tread in STEP 10 is performed by a straight line 29 orthogonal to the fourth predetermined position on the reference line 16 (a position 55% of the length of the reference line 16 from the rearmost end). Is measured from the distance from the reference line 16 to the intersection 30 of the contour line 18 of the sole ground contact surface portion. At this time, when the intersection 30 is on the outside of the foot (the direction of the little toe side), a positive value is assumed. When the intersection 30 is on the inside of the foot (the direction of the thumb of the foot), the arch is assumed to be a negative value. Can be confirmed. As shown in FIG. 10, the measurement of the first heel side angle in STEP 11 is performed by first calculating the intersection 27 detected in STEP 9 shown in FIG. 6 and the shin side midfoot point 22 detected in STEP 7 shown in FIG. A straight line 31 is drawn, and then a vertical line 32 is extended from the fifth predetermined position on the reference line 16 (position 90% of the length of the reference line 16 from the heel end) to the toe of the foot. A straight line 34 passing through the point 33 that intersects the contour 17 of the sole of the image and the shin side middle foot point 22 detected in STEP 7 shown in FIG. 6 is drawn. At this time, the angle θ1 between the straight line 31 and the straight line 34 is measured to obtain the first heel side angle. The fifth heel side angle can be confirmed by measuring the angle θ2 between the straight line 35 and the straight line 36 drawn in the same manner. The measurement of the contact area ratio with respect to the entire sole in STEP 12 is calculated from the area of the sole detected in STEP 4 and the area of the sole contact surface portion detected in STEP 5.

そして、前述した各測定結果をプリンタ１３から出力する。こうすることにより、足長寸法、足幅寸法（足囲寸法）、及び踵幅寸法等から、足型に合致したサイズや形状の靴を選択することができる。また、第１址側角度及び第５址側角度からは外反拇址等の傾向を確認することができ、不踏部寸法からは偏平足等の傾向を確認することができるので、足に傷害を持つ人に対してより詳細なアドバイスが可能となる。更に、接地面積率からは足への体重のかかり具合や左右のバランスを確認することが可能となる。このように、本実施形態の足型測定器１によれば、簡単な構成で足裏の形状を精度良く測定することができるので、靴の選択や、医学的・体育学的なにおける健康状態や運動能力の分析を極めて容易に行うことができる。   Then, each measurement result described above is output from the printer 13. By doing so, it is possible to select a shoe having a size or shape that matches the foot shape from the foot length dimension, the foot width dimension (foot circumference dimension), the heel width dimension, and the like. In addition, the tendency of hallux valgus etc. can be confirmed from the first heel side angle and the fifth heel side angle, and the tendency of flat feet etc. can be confirmed from the dimensions of the treads. More detailed advice is possible for those who have. Furthermore, it is possible to check the weight applied to the foot and the left / right balance from the contact area ratio. As described above, according to the foot type measuring instrument 1 of the present embodiment, the shape of the sole can be accurately measured with a simple configuration, so that the selection of shoes and the health condition in medical and physical education can be performed. And exercise ability can be analyzed very easily.

なお、本実施形態においては、更に、採取した測定結果を蓄積することにより、統計的に処理して靴の製造へのフイードバック、或いは、顧客管理等に活用することができる。   In the present embodiment, further, by collecting the collected measurement results, it can be statistically processed and used for feedback to the manufacture of shoes or for customer management.

また、本実施形態においては、足の側面を赤色（色相角度０度）、計測基準マーク８を緑色（色相角度１２０度）、カバー９（背景）を青色（色相角度２１０度）に色分けした。こうすることで、前記画像の各部分の色は互いの色相角度差が９０〜１２０度となって、最も良好な識別が可能となるが、各部分を異なる色として明確な色分けが可能であれば、他の色を採用しても良い。   In the present embodiment, the side surface of the foot is color-coded red (hue angle 0 degree), the measurement reference mark 8 is green (hue angle 120 degrees), and the cover 9 (background) is blue (hue angle 210 degrees). By doing this, the color of each part of the image has a hue angle difference of 90 to 120 degrees, and the best discrimination is possible, but it is possible to clearly color each part as a different color. For example, other colors may be adopted.

また、前記撮像手段４は、本実施形態においてはデジタルカメラを採用しているが、デジタルカメラ以外に、ＣＣＤ型カメラやＭＯＳ型カメラ等のビデオカメラ、或いは、光走査型センサー等を採用してもよい。   The image pickup means 4 employs a digital camera in the present embodiment, but adopts a video camera such as a CCD camera or a MOS camera, or an optical scanning sensor in addition to the digital camera. Also good.

また、足の側面を照射する光源は、蛍光管１４の代わりに白熱光源、放熱型光源、発光ダイオード等を採用してもよい。また、足の側面に照射する赤色の光は、赤色アクリル板１５の代わりに赤色発光ダイオードを採用してもよい。   Further, instead of the fluorescent tube 14, an incandescent light source, a heat radiation type light source, a light emitting diode or the like may be employed as the light source for irradiating the side surface of the foot. Further, a red light emitting diode may be adopted instead of the red acrylic plate 15 for the red light applied to the side of the foot.

また、本発明においては、図５（ａ）に示すカバー９に代えて、図１１に示すように、一枚の膜状部材３６によって構成されたカバー３７を設けてもよい。該カバー３７には足の出し入れ可能な長さのスリット３８を設け、更に、該スリット３８にスライドファスナー３９等を設けて開閉自在とすることができる。これによって、スリット３８を貫通させる足の大きさが異なっても、足との隙間をスライドファスナー３９により容易に閉じることができ、外部の光の足収容室１２内への漏れを防止することができる。   Further, in the present invention, instead of the cover 9 shown in FIG. 5A, as shown in FIG. 11, a cover 37 constituted by a single film-like member 36 may be provided. The cover 37 is provided with a slit 38 having a length that allows the foot to be taken in and out, and a slide fastener 39 or the like can be further provided in the slit 38 so that the cover 37 can be opened and closed. Thereby, even if the size of the foot passing through the slit 38 is different, the gap with the foot can be easily closed by the slide fastener 39, and leakage of external light into the foot accommodating chamber 12 can be prevented. it can.

また、本実施形態においては、両足を同時に撮像するものを挙げて説明したが、本発明はこれに限るものではなく、他の実施例としては、図示しないが足置き透明板を片足だけを載置する広さにすることもでき、装置自体の小型化することができる。   Further, in the present embodiment, the description has been given by taking an image of both feet simultaneously, but the present invention is not limited to this, and as another embodiment, although not shown, a footrest transparent plate is mounted on only one foot. It is also possible to reduce the size of the device itself.

本発明の１実施形態の足型測定器の概略構成を示す説明図。Explanatory drawing which shows schematic structure of the foot type measuring device of one Embodiment of this invention. 足型測定器本体の縦断面説明図。The longitudinal cross-sectional explanatory drawing of a foot type measuring device main body. 足収容室の内部を示す説明的平面図。Explanatory top view which shows the inside of a leg storage chamber. 要部の拡大説明図。Expansive explanatory drawing of the principal part. （ａ）はカバーの構成を示す斜視図、（ｂ）は一方の膜状部材の平面図、（ｃ）は他方の膜状部材の平面図。(A) is a perspective view which shows the structure of a cover, (b) is a top view of one membrane-like member, (c) is a top view of the other membrane-like member. 本実施形態の足型測定器による測定作業を示すフローチャート。The flowchart which shows the measurement operation | work by the foot type measuring device of this embodiment. 較正画像の作成作業を示すフローチャート。The flowchart which shows the preparation work of a calibration image. 足裏の輪郭検出作業を示すフローチャート。The flowchart which shows the contour detection operation | work of a sole. 足裏接地面部の輪郭検出作業を示すフローチャート。The flowchart which shows the contour detection operation | work of a sole contact surface part. 足裏の画像を示す説明図。Explanatory drawing which shows the image of a sole. カバーの他の形態を示す説明図。Explanatory drawing which shows the other form of a cover.

符号の説明Explanation of symbols

１…足型測定器、３…パーソナルコンピュータ（較正処理手段、計測処理手段）、４…撮像手段、６…足置き透明板、７…光照射手段、８…計測基準マーク、９，３７…カバー、９ａ，９ｂ…膜状部材、１０…出し入れ口、１０ａ…第１スリット、１０ｂ…第２スリット、１２…足収容室、１４…白色蛍光管（白色光源）、１５…赤色アクリル板（フィルタ）、１６…基準線、２２…脛側中足点（第１の交点）、２４…腓側中足点（第２の交点）。   DESCRIPTION OF SYMBOLS 1 ... Foot type measuring device, 3 ... Personal computer (calibration processing means, measurement processing means), 4 ... Imaging means, 6 ... Foot rest transparent plate, 7 ... Light irradiation means, 8 ... Measurement reference mark, 9, 37 ... Cover , 9a, 9b ... membrane-like member, 10 ... inlet / outlet, 10a ... first slit, 10b ... second slit, 12 ... foot storage chamber, 14 ... white fluorescent tube (white light source), 15 ... red acrylic plate (filter) , 16 ... reference line, 22 ... shin side midfoot point (first intersection), 24 ... heel side midfoot point (second intersection).

Claims (7)

足置き透明板上に載置された足を該足置き透明板の裏面側から撮像する撮像手段を備え、該撮像手段により得られる画像情報から足裏形状を計測する足型測定器において、
足置き透明板の外周側端面から第１の光を導入すると共に、該第１の光と異なる色の第２の光を足の外周側面に照射する光照射手段を設け、
前記撮像手段は、前記第１の光により照らされた足裏接地面部と、前記第２の光により照らされた足裏外周縁部とを同時に撮像することを特徴とする足型測定器。 In a foot type measuring instrument that includes an imaging unit that images a foot placed on a footrest transparent plate from the back side of the footrest transparent plate, and measures a sole shape from image information obtained by the imaging unit,
Introducing the first light from the outer peripheral side end surface of the footrest transparent plate, and providing a light irradiation means for irradiating the outer peripheral side surface of the foot with the second light of a color different from the first light,
The foot-type measuring instrument characterized in that the imaging means simultaneously images the sole contact surface illuminated by the first light and the sole outer peripheral edge illuminated by the second light. 外部の光を遮断した状態で前記足置き透明板及び該足置き透明板上の足を収容する足収容室を設け、
前記足置き透明板上の足を介して該足置き透明板に対向する前記足収容室の天面を青色とし、前記光照射手段における前記第１の光を白色光とすると共に前記第２の光を赤色光とすることを特徴とする請求項１記載の足型測定器。 A foot accommodating chamber for accommodating the footrest transparent plate and the feet on the footrest transparent plate in a state of blocking external light;
The top surface of the foot storage chamber facing the footrest transparent plate via the feet on the footrest transparent plate is blue, the first light in the light irradiation means is white light and the second light The foot-type measuring device according to claim 1, wherein the light is red light. 前記光照射手段は、単一の白色光源を有し、該光源の光を前記第１の光とすると共に、透過光を赤色とするフィルタを透過させた該光源の光を前記第２の光とすることを特徴とする請求項２記載の足型測定器。   The light irradiating means has a single white light source, the light from the light source is the first light, and the light from the light source that is transmitted through a filter that makes the transmitted light red is the second light. The foot type measuring device according to claim 2, wherein 前記足収容室は、前記足置き透明板の外側全周に起立する側壁と、該側壁の上端を覆うカバーとによって構成され、該カバーには、足収容室に足を出し入れする開閉自在の出し入れ口が設けられていることを特徴とする請求項２又は３項記載の足型測定器。   The foot storage chamber is composed of a side wall that stands on the entire outer periphery of the footrest transparent plate, and a cover that covers an upper end of the side wall. The foot type measuring device according to claim 2 or 3, wherein a mouth is provided. 前記カバーは、互いに重合された一対の伸縮自在の膜状部材で構成され、
前記出し入れ口は、一方の膜状部材に形成された第１スリットと、他方の膜状部材に形成されて前記第１スリットに交差する方向に延びる第２スリットとを備えることを特徴とする請求項４記載の足型測定器。 The cover is composed of a pair of stretchable film members superposed on each other,
The inlet / outlet comprises a first slit formed in one film-like member and a second slit formed in the other film-like member and extending in a direction intersecting the first slit. Item 5. A foot-type measuring instrument according to item 4. 前記足置き透明板上に載置された足の側面の最も外側に張り出す部分と略同じ高さに位置され、且つ、前記足置き透明板上の足の外側に互いに足裏形状を計測する際に基準となる同一の間隔寸法を存して配設されて、前記撮像手段により足裏と共に撮像される４つの計測基準マークを備え、
撮像手段により撮像された４つの計測基準マークに基づいて画像を較正し、該較正画像を撮像手段の画像情報とする較正処理手段を備えることを特徴とする請求項１乃至５の何れか１項記載の足型測定器。 It is positioned at substantially the same height as the outermost portion of the side surface of the foot placed on the footrest transparent plate, and measures the sole shape on the outside of the foot on the footrest transparent plate. Provided with four measurement reference marks which are arranged with the same interval dimension as a reference and are imaged together with the sole by the imaging means,
6. The apparatus according to claim 1, further comprising a calibration processing unit that calibrates an image based on four measurement reference marks imaged by the imaging unit and uses the calibration image as image information of the imaging unit. The foot type measuring instrument described. 前記撮像手段の画像情報から足裏形状を演算計測する計測処理手段を備え、
該計測処理手段は、前記画像情報における足裏の爪先側最先端から踵側最後端にわたる直線を基準線として該基準線の長さから足長を求め、該基準線の長さに応じて予め定められた該基準線上の第１の所定位置から該基準線の一側方に延ばした垂線が足裏画像の足裏外周縁部の輪郭と交わる第１の交点を検出すると共に、該基準線の長さに応じて予め定められた該基準線上の第２の所定位置から該基準線の他側方に延ばした垂線が足裏画像の足裏外周縁部の輪郭と交わる第２の交点を検出し、第１の交点と第２の交点との距離から足幅を求めることを特徴とする請求項１乃至６の何れか１項記載の足型測定器。 Comprising measurement processing means for computing and measuring the sole shape from the image information of the imaging means,
The measurement processing means obtains the foot length from the length of the reference line using a straight line extending from the tip of the toe side of the sole to the rear end of the heel side in the image information as a reference line, and in advance according to the length of the reference line Detecting a first intersection where a perpendicular extending from one first predetermined position on the reference line to one side of the reference line intersects the contour of the outer periphery of the sole of the sole image, and the reference line A second intersection point where a perpendicular extending from the second predetermined position on the reference line, which is predetermined according to the length of the reference line, to the other side of the reference line intersects the contour of the outer periphery of the sole of the sole image The foot type measuring device according to any one of claims 1 to 6, wherein the foot width is detected and a foot width is obtained from a distance between the first intersection and the second intersection.
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