JP3408175B2 - Hair quality evaluation device - Google Patents
Hair quality evaluation deviceInfo
- Publication number
- JP3408175B2 JP3408175B2 JP00509599A JP509599A JP3408175B2 JP 3408175 B2 JP3408175 B2 JP 3408175B2 JP 00509599 A JP00509599 A JP 00509599A JP 509599 A JP509599 A JP 509599A JP 3408175 B2 JP3408175 B2 JP 3408175B2
- Authority
- JP
- Japan
- Prior art keywords
- hair
- quality evaluation
- evaluation device
- holder
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- G01N21/84—Systems specially adapted for particular applications
-
- 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
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8444—Fibrous material
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、髪質を簡便に評価
し得るコンパクトな髪質の評価装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact hair quality evaluation device capable of easily evaluating hair quality.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】毛髪の
つやや色の深み等の髪質の機器評価には、一般に光学的
手法が用いられている。例えば、粧技雑第２４巻第２号
（１９９０年）１２９〜１３５頁には、毛髪の反射光量
を変角分光法（ゴニオフォトメトリー）を用いて測定
し、「正反射方向の光量」−「受光角＝０°における拡
散反射光量」の値をつや値として採用することにより、
毛髪のつやを評価している。2. Description of the Related Art An optical method is generally used for evaluating the quality of hair such as gloss and color depth of hair. For example, in Cosmetic Techniques, Vol. 24, No. 2 (1990), pages 129-135, the amount of light reflected by the hair is measured by using goniophotometry, and "the amount of light in the specular reflection direction"- By adopting the value of “diffuse reflected light amount at light receiving angle = 0 °” as the gloss value,
Evaluating the gloss of the hair.
【０００３】しかし、変角度分光法は、毛束を平坦な試
料台の上に装着し、光源又は検出器を移動させることに
よって、受光角を連続的に変化させながら反射光量を測
定するので、測定装置を小型化することは容易でない。
また、被験者の毛髪を切り取って評価に供しなければな
らなず、誰もが気軽に被験者となることができない。However, in the goniospectroscopic method, the hair bundle is mounted on a flat sample stand, and the light source or the detector is moved to measure the reflected light quantity while continuously changing the light receiving angle. It is not easy to downsize the measuring device.
In addition, the hair of the subject must be cut off for evaluation, and no one can easily become the subject.
【０００４】従って、本発明は、髪質を簡便に評価し得
るコンパクトで且つ携帯性のある髪質の評価装置を提供
することを目的とする。また、本発明は、被験者の毛髪
を切り取らずに評価に供し得る髪質の評価装置を提供す
ることを目的とする。Therefore, it is an object of the present invention to provide a compact and portable hair quality evaluation device for easily evaluating hair quality. Another object of the present invention is to provide a hair quality evaluation device that can be used for evaluation without cutting the hair of a subject.
【０００５】[0005]
【課題を解決するための手段】本発明は、所定本数の毛
髪を所定の曲率にて湾曲させた状態下に保持し得る周面
部を有する毛髪保持具と、該毛髪保持具に保持された該
毛髪に光を照射する光源と、該毛髪からの反射光を捉え
る撮像手段とを備え、該撮像手段が、該反射光の内の正
反射光が得られる該毛髪の領域を含む領域を、該毛髪の
長手方向に亘って撮像し得る位置に配されている髪質の
評価装置を提供することにより上記目的を達成したもの
である。The present invention provides a hair holder having a peripheral surface portion capable of holding a predetermined number of hairs in a curved state with a predetermined curvature, and a hair holder held by the hair holder. A light source that irradiates the hair with light, and an image capturing unit that captures the reflected light from the hair are provided, and the image capturing unit includes a region including the region of the hair in which specular reflected light of the reflected light is obtained. The above object is achieved by providing a hair quality evaluation device arranged at a position where an image can be taken in the longitudinal direction of hair.
【０００６】[0006]
【発明の実施の形態】以下、本発明の髪質の評価装置
を、その好ましい実施形態に基づき図面を参照して説明
する。図１には本実施形態の評価装置１の構成を示す模
式図が示されている。この評価装置１は、ハウジング２
を備えている。ハウジング２内は、測定対象となる毛髪
を保持する毛髪保持具３、毛髪保持具３に保持された毛
髪に光を照射する光源４、及び毛髪からの反射光を捉え
る撮像手段５がそれぞれ配置されている。毛髪保持具
３、光源４及び撮像手段５は、平面視して一直線上に並
ぶように配置されている。BEST MODE FOR CARRYING OUT THE INVENTION The hair quality evaluation apparatus of the present invention will be described below based on its preferred embodiments with reference to the drawings. FIG. 1 is a schematic diagram showing the configuration of the evaluation device 1 of this embodiment. This evaluation device 1 includes a housing 2
Is equipped with. Inside the housing 2, a hair holder 3 that holds the hair to be measured, a light source 4 that irradiates the hair held by the hair holder 3 with light, and an imaging unit 5 that captures the reflected light from the hair are arranged. ing. The hair holder 3, the light source 4, and the imaging unit 5 are arranged so as to be aligned on a straight line in a plan view.
【０００７】ハウジング２の内面は黒色の遮光布で覆わ
れており、光源４から照射された光がハウジング２の内
面で反射した後に測定対象である毛髪に入射しないよう
になされている。また、ハウジング２は、外部からの光
が入らないような遮光構造となっている。The inner surface of the housing 2 is covered with a black light shielding cloth so that the light emitted from the light source 4 does not enter the hair to be measured after being reflected by the inner surface of the housing 2. Further, the housing 2 has a light-shielding structure that prevents light from entering from the outside.
【０００８】図２には毛髪保持具３の分解斜視図が示さ
れている。毛髪保持具３は、円筒状の構造又は円筒側面
の形状を部分的に有する構造を備えている。本実施形態
における毛髪保持具３は、所定の直径を有する円筒状ロ
ッド３ａと、ホルダー３ｂとから構成されている。ホル
ダー３ｂは、円筒状ロッド３ａの周方向に沿って該円筒
状ロッド３ａと嵌合する一対の嵌合部３ｂ’，３ｂ’
と、一対の該嵌合部３ｂ’を互いに連結する直線状の一
対の連結部３ｂ”，３ｂ”とから構成されている。測定
対象となる毛髪は、円筒状ロッド３ａの周方向に沿って
各毛髪が略平行となるように、該円筒状ロッド３ａの周
面上に配置される。そして、その上からホルダー３ｂを
嵌合させることで、毛髪は嵌合部３ｂ’及び連結部３
ｂ”によって円筒状ロッド３ａの周面に押しつけられ、
図３に示すような保持状態となされる。斯かる保持状態
において、ホルダー３ｂにおける嵌合部３ｂ’，３ｂ’
間は毛髪の露出部Ｅとなり、露出部Ｅが撮像手段５によ
る撮像対象領域となる。斯かるホルダー３ｂを用いるこ
とによって、毛髪Ｈの浮き上がりや、毛髪Ｈの末端の跳
ね上がりが効果的に防止され、測定精度が高まる。露出
部Ｅの角度α（図３参照）、即ち円筒状ロッド３ａの周
方向に沿って保持された毛髪Ｈが描く円弧の角度は、６
０〜３６０°、特に１５０〜３００°であることが、ホ
ルダー３ｂによって末端が固定されなかった毛髪が撮像
手段５の撮像視野内に入らなくなることから好ましい。
また露出部Ｅの軸方向の幅Ｗ（図３参照）は、０．１〜
１００ｍｍ、特に１〜３０ｍｍであることが、再現性よ
く毛髪を固定し得る点から好ましい。FIG. 2 shows an exploded perspective view of the hair holder 3. The hair holder 3 has a cylindrical structure or a structure partially having the shape of a cylindrical side surface. The hair holder 3 in this embodiment includes a cylindrical rod 3a having a predetermined diameter and a holder 3b. The holder 3b includes a pair of fitting portions 3b 'and 3b' that fit with the cylindrical rod 3a along the circumferential direction of the cylindrical rod 3a.
And a pair of linear connecting portions 3b ″, 3b ″ that connect the pair of fitting portions 3b ′ to each other. The hair to be measured is arranged on the circumferential surface of the cylindrical rod 3a such that the hairs are substantially parallel to each other along the circumferential direction of the cylindrical rod 3a. Then, by fitting the holder 3b from above, the hair is fitted into the fitting portion 3b ′ and the connecting portion 3b.
b "is pressed against the peripheral surface of the cylindrical rod 3a,
The holding state as shown in FIG. 3 is obtained. In such a holding state, the fitting portions 3b ', 3b' in the holder 3b
The exposed area E becomes the exposed area E of the hair, and the exposed area E becomes the imaging target area by the imaging means 5. By using such a holder 3b, lifting of the hair H and bouncing of the end of the hair H are effectively prevented, and the measurement accuracy is improved. The angle α of the exposed portion E (see FIG. 3), that is, the angle of the arc drawn by the hair H held along the circumferential direction of the cylindrical rod 3a is 6
It is preferable that the angle is 0 to 360 °, particularly 150 to 300 °, because the hair whose end is not fixed by the holder 3b does not enter the imaging visual field of the imaging unit 5.
In addition, the width W (see FIG. 3) in the axial direction of the exposed portion E is 0.1 to 10.
It is preferably 100 mm, particularly 1 to 30 mm, from the viewpoint of fixing the hair with good reproducibility.
【０００９】図３に示すように、毛髪Ｈは、所定の曲率
にて凸状に湾曲された状態下に保持されることになる。
毛髪Ｈをこのような保持状態下に評価することによっ
て、従来用いられてきた変角分光法に用いられる装置と
異なり、検出器や光源を移動させる必要が無くなるの
で、評価装置自体をコンパクト化・携帯化することが容
易となる。しかも可動部分が無いことから測定自体も容
易となる。従って、例えば、ヘアケ製品の店頭における
販売促進のためデモンストレーション用として上記評価
装置１は極めて有用である。更に、毛髪を凸状に湾曲し
た状態下に保持することで、実際の頭髪の状態に近い状
態での評価が可能となり、視覚的な官能評価との相関性
が一層高まる。その上、変角分光法で得られる髪質に関
する情報よりも多くの様々な有用な情報を得ることがで
きる。As shown in FIG. 3, the hair H is held in a state of being convexly curved with a predetermined curvature.
By evaluating the hair H under such a holding state, it is not necessary to move the detector or the light source unlike the apparatus used for the conventional goniospectroscopic method, so that the evaluation apparatus itself can be made compact. It becomes easy to carry. Moreover, since there are no moving parts, the measurement itself is easy. Therefore, for example, the evaluation device 1 is extremely useful for demonstration for promoting sales of hair care products in stores. Furthermore, by holding the hair in a state of being curved in a convex shape, it becomes possible to evaluate the hair in a state close to the actual hair state, and the correlation with the visual sensory evaluation is further enhanced. In addition, more variety of useful information can be obtained than the information on hair quality obtained by goniospectroscopy.
【００１０】毛髪に再現性よく一定の曲率形状を付与し
得る点、及び一般的な長さの毛髪を保持しうる点から、
保持状態下における毛髪Ｈの曲率、即ち本実施形態にお
いては円筒状ロッド３ａの半径は１０〜５０ｍｍとす
る。 The hair is given a certain curvature shape with good reproducibility.
From the point of gaining and holding hair of general length,
The curvature of the hair H in the holding state, that is, the radius of the cylindrical rod 3a in this embodiment is 10 to 50 mm .
It
【００１１】評価対象となる毛髪の本数に特に制限は無
いが、本数が多い方が測定精度が一層高くなる。複数本
の毛髪が用いられる場合には、該毛髪は、上述した通り
各毛髪が円筒状ロッド３ａの周方向に沿って略平行とな
るように、円筒状ロッド３ａの軸方向に亘り均一な厚み
で保持されることが好ましい。The number of hairs to be evaluated is not particularly limited, but the larger the number, the higher the measurement accuracy. When a plurality of hairs are used, the hairs have a uniform thickness along the axial direction of the cylindrical rod 3a so that each hair is substantially parallel to the circumferential direction of the cylindrical rod 3a as described above. Preferably held at
【００１２】円筒状ロッド３ａの周面は、黒色の遮光布
で被覆されており、これにより該円筒状ロッド３ａの周
面自体で反射が起こることが効果的に防止され、測定精
度が一層高まる。また、円筒状ロッド３ａの周面上に
は、該円筒状ロッド３ａの軸方向に亘って櫛歯３ｃが配
されている。これにより、毛髪Ｈが互いに平行に整えら
れた状態で該周面上に保持され、測定精度が更に一層高
まる。The peripheral surface of the cylindrical rod 3a is covered with a black light-shielding cloth, which effectively prevents reflection from occurring on the peripheral surface of the cylindrical rod 3a itself and further improves the measurement accuracy. . Further, comb teeth 3c are arranged on the circumferential surface of the cylindrical rod 3a in the axial direction of the cylindrical rod 3a. As a result, the hairs H are held on the peripheral surface in a state of being arranged parallel to each other, and the measurement accuracy is further enhanced.
【００１３】毛髪保持具３は、図１に示すように評価装
置１内における底部Ｂ近傍に着脱可能に配されており、
底部Ｂに設けられた取り出し用開口部（図示せず）を通
じて装置外に取り出すことができる。評価に際しては、
毛髪をカーラーで巻く要領と同じ要領で、評価対象とな
る毛髪を毛髪保持具３に固定することができるので、被
験者は自己の毛髪を切り取ることなく毛髪保持具３に固
定させた状態で、該毛髪を評価に供することができる。As shown in FIG. 1, the hair holder 3 is detachably arranged near the bottom portion B in the evaluation device 1.
It can be taken out of the device through a take-out opening (not shown) provided in the bottom portion B. When evaluating,
Since the hair to be evaluated can be fixed to the hair holder 3 in the same manner as winding the hair with a curler, the test subject can fix the hair on the hair holder 3 without cutting the hair. The hair can be evaluated.
【００１４】光源４は、ハウジング２の上部の位置に固
定されている。光源４としては、髪質の評価に一般に用
いられているＪＩＳ標準Ａ光源などが用いられるが、こ
れに限定されるものではない。光源４は、それが連続光
源である場合には、光の照射対象となる毛髪の表面照度
が１〜１０００００ルックス、特に１０〜１００００ル
ックスとなるようなものであることが、撮像手段５とし
て通常の感度の画像入力装置を用い得る点、及び毛髪を
過度に加熱しない点から好ましい。また、光源４として
ストロボ光源等の非連続光源を用いることもできる。The light source 4 is fixed at a position above the housing 2. As the light source 4, a JIS standard A light source or the like generally used for evaluating hair quality is used, but the light source 4 is not limited to this. When the light source 4 is a continuous light source, the surface illuminance of the hair to be irradiated with light is usually 1 to 100,000 lux, and particularly 10 to 10000 lux. This is preferable from the viewpoint that an image input device having the above sensitivity can be used and that the hair is not excessively heated. A non-continuous light source such as a strobe light source can also be used as the light source 4.
【００１５】光源４からの光は、毛髪保持具３からの見
込む角が０〜１８０°、特に４５〜１３５°となるよう
に照射されることが、ハウジング２をより小型化できる
点から好ましい。また、毛髪が、図３に示すように円筒
状ロッド３ａの周方向に沿って略平行となるように保持
されている場合には、該毛髪の長手方向と直交する方向
（この方向は円筒状ロッド３ａの軸方向と同方向であ
る）における該毛髪の表面照度が略同一となるように光
を照射する。これにより測定精度が更に一層高まる。It is preferable that the light from the light source 4 is irradiated so that the angle of view from the hair holder 3 is 0 to 180 °, particularly 45 to 135 °, in order to make the housing 2 smaller. Further, when the hair is held so as to be substantially parallel to the circumferential direction of the cylindrical rod 3a as shown in FIG. 3, a direction orthogonal to the longitudinal direction of the hair (this direction is a cylindrical shape). The light is irradiated so that the surface illuminance of the hair in the axial direction of the rod 3a) is approximately the same. This further improves the measurement accuracy.
【００１６】撮像手段５としては、デジタルカメラ、ビ
デオカメラ等の各種カメラを用いることができ、特に撮
像データの処理の容易なデジタルカメラが好ましく用い
られる。撮像手段５で得られた撮像データは、図示しな
いデータ処理手段に送られる。撮像データは、撮像手段
がデータ処理手段と電気的、光学的或いはその他の手段
で接続されることによりデータ処理手段に送られる。評
価装置１の携帯性を重視する場合は、撮像データが磁気
的、電気的、光学的或いはその他の手段によって格納さ
れたリムーバルなデータ格納媒体を介して、データ処理
手段に撮像データを送ることが好ましい。データ処理手
段に連続的にデータを送る場合、あるいはデータ処理手
段に撮像手段の制御機構を組み込む場合は、両手段間を
磁気的、電気的又は光学的な通信手段で接続することが
好ましい。尚、データ処理手段としては、所定の画像処
理プラグラムの実行が可能な各種コンピュータ等が用い
られる。As the image pickup means 5, various cameras such as a digital camera and a video camera can be used, and a digital camera which can easily process the image pickup data is preferably used. The image pickup data obtained by the image pickup means 5 is sent to a data processing means (not shown). The image pickup data is sent to the data processing unit by connecting the image pickup unit to the data processing unit by electrical, optical or other means. When importance is attached to the portability of the evaluation device 1, the imaging data may be sent to the data processing means via a removable data storage medium in which the imaging data is stored magnetically, electrically, optically or by other means. preferable. When continuously transmitting data to the data processing means or when incorporating a control mechanism of the image pickup means in the data processing means, it is preferable to connect the both means by a magnetic, electrical or optical communication means. As the data processing means, various computers capable of executing a predetermined image processing program are used.
【００１７】撮像手段５は、評価対象となる毛髪からの
反射光の内の正反射光が得られる該毛髪の領域を含む領
域を、該毛髪の長手方向に亘って撮像し得る位置に配さ
れている。斯かる領域を撮像することによって、髪質に
関する様々な有用な情報を得ることができる。The image pickup means 5 is arranged at a position capable of picking up an image of a region including the region of the hair from which the specularly reflected light of the reflected light from the hair to be evaluated is obtained, in the longitudinal direction of the hair. ing. By imaging such a region, various useful information regarding hair quality can be obtained.
【００１８】上述した通り、本実施形態の評価装置１に
おいては、毛髪保持具３、光源４及び撮像手段５が平面
視して一直線上に並ぶように配置されている。更に評価
装置１においては、図１に示すように毛髪保持具３、光
源４及び撮像手段５が所定の角度θをなすように配置さ
れている。角度θの値は、正反射光を撮像範囲に入れる
点から、０〜１８０°、特に０〜１２０°であることが
好ましい。As described above, in the evaluation device 1 of this embodiment, the hair holder 3, the light source 4, and the image pickup means 5 are arranged so as to be aligned on a straight line in a plan view. Furthermore, in the evaluation device 1, as shown in FIG. 1, the hair holder 3, the light source 4, and the imaging means 5 are arranged so as to form a predetermined angle θ. The value of the angle θ is preferably 0 to 180 °, and particularly preferably 0 to 120 ° from the viewpoint of allowing specular reflection light to enter the imaging range.
【００１９】図１に示す評価装置１には、撮像手段５に
よる撮像視野内の位置にグレースケール６が配されてい
る。これにより、撮像手段５で毛髪を撮像した場合、該
毛髪と共にグレースケール６が撮像される。その結果、
撮像された該毛髪の撮像データを画像処理する際に、ク
レースケール６の撮像データに基づき該毛髪の撮像デー
タの補正を行うことができ、測定精度が一層高まる。In the evaluation device 1 shown in FIG. 1, a gray scale 6 is arranged at a position within the field of view picked up by the image pickup means 5. As a result, when the hair is imaged by the imaging unit 5, the gray scale 6 is imaged together with the hair. as a result,
When the imaged data of the imaged hair is image-processed, the imaged data of the hair can be corrected based on the imaged data of the clay scale 6, and the measurement accuracy is further enhanced.
【００２０】本実施形態の評価装置１によれば、髪質に
関する様々な有用な情報を得ることができる。例えば、
毛髪のつや、色の深み、直毛の程度、枝毛の発生度、毛
髪間の色のばらつき、毛髪の太さのばらつき等に関する
情報を得ることができる。具体的には、毛髪のつやに関
しては、毛髪の撮像データから該毛髪の長手方向につい
ての輝度分布を求め、該輝度分布の変化量の絶対値の最
大値から該毛髪のつやの良否を評価することができる。
また、毛髪の色の深みに関しては、毛髪の撮像データか
ら毛髪の長手方向についてのＲ及びＢの各信号強度の分
布を求め、該信号強度の分布に基づきＲの信号強度から
Ｂの信号強度を差し引いた値の分布を求め、該差し引い
た値の分布における最大値と最小値との差から該毛髪の
色の深みを評価することができる。According to the evaluation device 1 of this embodiment, various useful information regarding the hair quality can be obtained. For example,
It is possible to obtain information on the gloss of hair, the depth of color, the degree of straight hair, the degree of split ends, the variation in color between hairs, the variation in thickness of hair, and the like. Specifically, regarding the gloss of the hair, the luminance distribution in the longitudinal direction of the hair is obtained from the imaged data of the hair, and the quality of the gloss of the hair is evaluated from the maximum absolute value of the change amount of the luminance distribution. You can
Regarding the depth of the hair color, the distribution of the signal intensities of R and B in the longitudinal direction of the hair is obtained from the imaged data of the hair, and the signal intensity of B is calculated from the signal intensity of R based on the distribution of the signal intensities. The distribution of the subtracted values can be obtained, and the color depth of the hair can be evaluated from the difference between the maximum value and the minimum value in the distribution of the subtracted values.
【００２１】以下、本実施形態の評価装置１による髪質
の評価の一つの具体例として、該装置１を毛髪のつやの
評価に適用した場合について説明する。先ず、所定本数
の毛髪を、図２に示す毛髪保持具３を用いて図３に示す
ように保持固定する。上述の通り上記評価装置１を用い
れば、被験者から毛髪を切り取らずに、該毛髪を毛髪保
持具３に保持できる。次いで、毛髪を保持した毛髪保持
具３は、評価装置１における底部開口部から装置内に挿
入されて、装置内の所定の位置に装着される。Hereinafter, as one specific example of the evaluation of the hair quality by the evaluation device 1 of the present embodiment, the case where the device 1 is applied to the evaluation of the gloss of the hair will be described. First, a predetermined number of hairs are held and fixed as shown in FIG. 3 by using the hair holder 3 shown in FIG. As described above, by using the evaluation device 1, the hair can be held in the hair holder 3 without cutting the hair from the subject. Next, the hair holder 3 holding the hair is inserted into the device through the bottom opening of the evaluation device 1 and mounted at a predetermined position in the device.
【００２２】次いで、毛髪に向けて光源４から所定の光
を照射し、この状態下に撮像手段５によって毛髪を撮像
する。撮像領域は上述の通り、毛髪からの反射光の内の
正反射光が得られる領域を含む、毛髪の長手方向に亘る
領域である。更に、撮像に際しては、グレースケール６
も同時に撮像される。撮像手段５によって得られた撮像
データは、データ処理手段において画像処理が施され、
該毛髪の長手方向についての輝度分布が得られる。Next, predetermined light is emitted from the light source 4 toward the hair, and under this condition, the hair is imaged by the imaging means 5. As described above, the imaging region is a region extending in the longitudinal direction of the hair, including a region in which the specularly reflected light of the reflected light from the hair is obtained. Furthermore, when imaging, grayscale 6
Is also imaged at the same time. The image pickup data obtained by the image pickup means 5 is subjected to image processing in the data processing means,
A luminance distribution in the longitudinal direction of the hair can be obtained.
【００２３】詳細には、先ず、撮像されたグレースケー
ル６のＲＧＢ測定値を用いて、撮像された毛髪の各ＲＧ
Ｂ値を補正する。補正後、毛髪が保持された毛髪保持具
３における露出部Ｅ（図３参照）に対応する、撮像デー
タにおける領域のＲＧＢ値を、幅方向（円筒状ロッド３
ａの軸方向と同方向）に亘って積算する。この積算によ
って、Ｓ／Ｎ比が高くなり測定精度が一層向上する。積
算されたＲＧＢ値を輝度の値に変換し、毛髪の長手方向
についての輝度分布を求める。ＲＧＢ値を輝度の値に変
換する方法は、画像処理の分野において公知の方法であ
り、例えば各々０〜２５５の範囲で得られるＲＧＢ値よ
り、０〜２５５の範囲の値を持つ輝度値を得ることがで
きる。Specifically, first, by using the RGB measurement values of the gray scale 6 which have been imaged, each RG of the imaged hair is measured.
Correct the B value. After the correction, the RGB values of the area in the imaging data corresponding to the exposed portion E (see FIG. 3) of the hair holder 3 holding the hair are set in the width direction (cylindrical rod 3
(The same as the axial direction of a)). By this integration, the S / N ratio is increased and the measurement accuracy is further improved. The integrated RGB values are converted into luminance values to obtain a luminance distribution in the longitudinal direction of hair. A method of converting an RGB value into a luminance value is a known method in the field of image processing. For example, a luminance value having a value in the range of 0 to 255 is obtained from RGB values obtained in the range of 0 to 255, respectively. be able to.
【００２４】このようにして得られた輝度分布の一例は
図４に示す通りとなる。図４中、横軸は撮像データにお
ける長手方向（毛髪の長手方向と平行な方向）の基準点
からの距離を表し、縦軸が輝度を表している。そして、
輝度が最大値をとる横軸の位置が、正反射光が得られる
位置に対応している。尚、上記基準点は、撮像領域の大
小に応じて任意に定めることができる。好ましくは、輝
度が最大値をとる位置（即ち正反射光が得られる位置）
が分布曲線におけるほぼ中央に位置するように上記基準
点を定める。An example of the brightness distribution thus obtained is as shown in FIG. In FIG. 4, the horizontal axis represents the distance from the reference point in the longitudinal direction (direction parallel to the longitudinal direction of hair) in the imaged data, and the vertical axis represents the brightness. And
The position of the horizontal axis where the brightness has the maximum value corresponds to the position where the specular reflection light is obtained. The reference point can be arbitrarily set according to the size of the imaging area. Preferably, the position where the brightness takes the maximum value (that is, the position where specular reflection light is obtained)
The above-mentioned reference point is determined so that is located almost at the center of the distribution curve.
【００２５】次に、図４に示す輝度分布曲線を微分して
輝度の変化量を求める。そして、この輝度の変化量の絶
対値を、撮像データにおける長手方向に対してプロット
すると図５に示すグラフが得られる。このグラフにおけ
る絶対値の最大値の大小から毛髪のつやの良否が評価さ
れる。具体的には、該絶対値の最大値が大きいほど毛髪
につやがあると評価され、該絶対値の最大値が小さいほ
ど毛髪につやが無いと評価される。この評価方法は、官
能評価熟練者による毛髪のつやに関する官能評価と高い
相関性を有していることが確認されている。Next, the brightness distribution curve shown in FIG. 4 is differentiated to obtain the brightness change amount. Then, when the absolute value of the change amount of the luminance is plotted in the longitudinal direction of the imaged data, the graph shown in FIG. 5 is obtained. The quality of the gloss of the hair is evaluated based on the magnitude of the maximum absolute value in this graph. Specifically, the larger the maximum absolute value is, the more glossy the hair is evaluated, and the smaller the maximum absolute value is, the less glossy the hair is. It has been confirmed that this evaluation method has a high correlation with the sensory evaluation of the gloss of hair by a sensory evaluation expert.
【００２６】[0026]
【発明の効果】本発明によれば、髪質を簡便に評価し得
るコンパクトな髪質の評価装置が提供される。また、本
発明によれば、被験者の毛髪を切り取ること無く評価に
供し得る髪質の評価装置が提供される。本発明の評価装
置を用いると、髪質に関する様々な有用な情報を簡便に
得ることができる。According to the present invention, there is provided a compact hair quality evaluation device capable of easily evaluating hair quality. Further, according to the present invention, there is provided a hair quality evaluation device that can be used for evaluation without cutting the hair of a subject. By using the evaluation device of the present invention, various useful information regarding hair quality can be easily obtained.
【図１】本発明の評価装置の一実施形態の構成を示す模
式図である。FIG. 1 is a schematic diagram showing a configuration of an embodiment of an evaluation device of the present invention.
【図２】毛髪保持具の分解斜視図である。FIG. 2 is an exploded perspective view of a hair holder.
【図３】毛髪保持具によって保持された毛髪の保持状態
を示す図である。FIG. 3 is a diagram showing a holding state of hair held by a hair holder.
【図４】本発明の評価装置を用いて測定された毛髪の長
手方向についての輝度分布を示す図である。FIG. 4 is a diagram showing a luminance distribution in the longitudinal direction of hair, which is measured using the evaluation device of the present invention.
【図５】図４に示す輝度分布の変化量の絶対値を示す図
である。5 is a diagram showing an absolute value of a variation amount of the luminance distribution shown in FIG.
１ 評価装置 ２ ハウジング ３ 毛髪保持具 ３ａ 円筒状ロッド ３ｂ ホルダー ３ｂ’嵌合部 ３ｂ”連結部 ３ｃ 櫛歯 ４ 光源 ５ 撮像手段 ６ グレースケール 1 Evaluation device 2 housing 3 hair holder 3a Cylindrical rod 3b holder 3b 'fitting part 3b "connection 3c comb teeth 4 light sources 5 Imaging means 6 gray scale
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−105045（ＪＰ，Ａ) 特開 昭49−1278（ＪＰ，Ａ) 特開 平７−115846（ＪＰ，Ａ) 特開 昭60−88507（ＪＰ，Ａ) 実開 昭55−107802（ＪＰ，Ｕ) 実開 平１−70161（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 21/00 - 21/01 G01N 21/17 - 21/61 実用ファイル（ＰＡＴＯＬＩＳ) 特許ファイル（ＰＡＴＯＬＩＳ)─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-4-105045 (JP, A) JP-A-49-1278 (JP, A) JP-A-7-115846 (JP, A) JP-A-60- 88507 (JP, A) Actual development Sho-55-107802 (JP, U) Actual development 1-70161 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) G01N 21/00-21 / 01 G01N 21/17-21/61 Practical file (PATOLIS) Patent file (PATOLIS)
Claims (7)
本数の該毛髪を一定の曲率にて凸状に湾曲させた状態下
に保持し得る周面部を有する毛髪保持具と、該毛髪保持
具に保持された該毛髪に光を照射する光源と、該毛髪か
らの反射光を捉える撮像手段とを備え、該撮像手段が、
該反射光の内の正反射光が得られる該毛髪の領域を含む
領域を、該毛髪の長手方向に亘って撮像し得る位置に配
されており、上記毛髪保持具における上記周面部の半径
が１０〜５０ｍｍである髪質の評価装置。1. A without cutting the subject of hair, and the hair retainer has a peripheral surface portion that can be held under a state of being curved in a convex shape the hair of a predetermined number at a constant curvature, the the hair retainer A light source that irradiates the held hair with light, and an imaging unit that captures reflected light from the hair, the imaging unit comprising:
An area including the area of the hair from which the specular reflection light of the reflected light is obtained is arranged at a position where an image can be taken in the longitudinal direction of the hair, and the radius of the peripheral surface portion of the hair holder.
Is a hair quality evaluation device of 10 to 50 mm .
手段が平面視して一直線上に位置するように配されてい
る請求項１記載の髪質の評価装置。2. The hair quality evaluation device according to claim 1, wherein the hair holder, the light source, and the image pickup means are arranged so as to be aligned on a straight line in a plan view.
筒側面の形状を部分的に有する構造を備えており、該円
筒の周方向に沿って、該円筒の周面上に毛髪が保持され
るようになされている請求項１又は２記載の髪質の評価
装置。3. The hair holder is provided with a cylindrical structure or a structure partially having a shape of a cylindrical side surface, and hair is held on the peripheral surface of the cylinder along the circumferential direction of the cylinder. The hair quality evaluation device according to claim 1 or 2, which is configured to be performed.
部分的に有する構造の軸方向に亘って、それらの周面上
に櫛歯が配されている請求項３記載の髪質の評価装置。4. The cylindrical structure or the shape of the side surface of the cylinder
Over the axial structure having partially hair quality evaluation apparatus of their circumferential surface the comb teeth are arranged is in that according to claim 3, wherein on.
グレースケールが配されている請求項１〜４の何れかに
記載の髪質の評価装置。5. The hair quality evaluation apparatus according to claim 1, wherein a gray scale is arranged at a position within an imaging visual field by the imaging means.
手段が０〜１２０゜の角度をなすように配置されている
請求項１〜５の何れかに記載の髪質の評価装置。 6. The hair holder, the light source, and the imaging
The means are arranged at an angle of 0 to 120 °
The hair quality evaluation device according to claim 1.
手段が、遮光構造を有するハウジング内に配置されてい
る請求項１〜６の何れかに記載の髪質の評価装置。 7. The hair holder, the light source, and the image pickup device.
Means are arranged in a housing having a light blocking structure
7. The hair quality evaluation device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00509599A JP3408175B2 (en) | 1999-01-12 | 1999-01-12 | Hair quality evaluation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00509599A JP3408175B2 (en) | 1999-01-12 | 1999-01-12 | Hair quality evaluation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000206043A JP2000206043A (en) | 2000-07-28 |
| JP3408175B2 true JP3408175B2 (en) | 2003-05-19 |
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| JP5141883B2 (en) | 2007-01-30 | 2013-02-13 | 花王株式会社 | Hair evaluation method and system |
| JP2008208117A (en) | 2007-01-30 | 2008-09-11 | Kao Corp | Aqueous external preparation for scalp |
| EP2848919A1 (en) * | 2013-09-17 | 2015-03-18 | The Procter and Gamble Company | Method and apparatus for creating images of fibrous structures |
| JP7172231B2 (en) * | 2018-07-03 | 2022-11-16 | 株式会社リコー | Inspection device, inspection method, and program |
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