JP2003024283A - Skin surface state observing apparatus - Google Patents
Skin surface state observing apparatusInfo
- Publication number
- JP2003024283A JP2003024283A JP2001218369A JP2001218369A JP2003024283A JP 2003024283 A JP2003024283 A JP 2003024283A JP 2001218369 A JP2001218369 A JP 2001218369A JP 2001218369 A JP2001218369 A JP 2001218369A JP 2003024283 A JP2003024283 A JP 2003024283A
- Authority
- JP
- Japan
- Prior art keywords
- colorimetric
- image
- light
- skin surface
- surface condition
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、皮膚表面状態観察
装置に関し、一層詳細には、撮像機能と測色機能とを有
する皮膚表面状態観察装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin surface condition observing device, and more particularly to a skin surface condition observing device having an image pickup function and a colorimetric function.
【０００２】[0002]
【従来の技術】きめの程度や色素分布等の皮膚の表面状
態を的確に把握し、また、皮膚の色（肌色）を正確に測
定することは、化粧品の販売を促進しあるいは技術開発
を進めていく上において、いずれも欠くことができない
重要な要素である。2. Description of the Related Art Accurately grasping the surface condition of the skin such as texture and pigment distribution, and accurately measuring the skin color (skin color) promotes sales of cosmetics or promotes technological development. All of these are important elements that are indispensable to the progress.
【０００３】この場合、皮膚表面状態に応じた適切な化
粧品を選択するためには、きめ等の表面状態情報および
肌色情報のいずれか一方の情報のみに基づいて判断する
のでは十分ではなく、きめ等の表面状態情報および肌色
情報を同時に得て、双方の情報を付き合わせて総合的に
判断することが効果的である。In this case, in order to select an appropriate cosmetic product according to the surface condition of the skin, it is not sufficient to make a judgment based on only one of the surface condition information such as texture and the skin color information. It is effective to simultaneously obtain the surface state information and the skin color information, etc., and make a comprehensive judgment by combining both information.
【０００４】通常、きめ等の表面状態についてはカメラ
を用いて皮膚表面の拡大画像を観察することによって行
われ、一方、肌色については測色計を用いて測色値を得
ることによって行われる。Usually, the surface condition such as texture is observed by observing an enlarged image of the skin surface with a camera, while the skin color is obtained by using a colorimeter to obtain a colorimetric value.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うに、カメラおよび測色計という別々の装置を用いて皮
膚の表面状態を総合的に判断する場合、以下のような不
具合がある。However, when the surface condition of the skin is comprehensively judged by using the separate devices such as the camera and the colorimeter, there are the following problems.
【０００６】まず、観察目的に応じて複数の装置を使い
分けるのは煩雑であり、また、設置スペース等の点にお
いても好ましくない。First, it is complicated to properly use a plurality of devices according to the purpose of observation, and it is not preferable in terms of installation space.
【０００７】また、総じて装置全体として高価になりが
ちである。[0007] Further, the apparatus as a whole tends to be expensive.
【０００８】また、一方の装置が故障し、これを補修し
あるいは更新した場合、故障前に得られていた表面状態
情報と肌色情報との対応関係が得られなくなるおそれも
ある。Further, when one of the devices fails and is repaired or updated, the correspondence between the surface state information and the skin color information obtained before the failure may not be obtained.
【０００９】本発明は、上記の課題に鑑みてなされたも
のであり、１つの受光素子を介して撮像機能と測色機能
とを合わせ持つことにより種々の利便性を備えた皮膚表
面状態観察装置を提供することを目的とする。The present invention has been made in view of the above problems, and has a skin surface condition observing apparatus having various conveniences by combining an image pickup function and a color measurement function through one light receiving element. The purpose is to provide.
【００１０】[0010]
【課題を解決するための手段】本発明に係る皮膚表面状
態観察装置は、皮膚の観察部位に光を照射する照明手段
と、照射した光の該観察部位からの反射光を受光して受
光素子に入射する撮像手段と、該撮像手段からの画像信
号を測色信号に変換する変換手段と、該撮像手段からの
画像信号に基づいて処理した画像を出力表示する画像表
示手段と、該測色信号に基づいて処理した測色情報を表
示する測色情報表示手段とを有することを特徴とする。Means for Solving the Problems A skin surface condition observing apparatus according to the present invention comprises an illuminating means for irradiating an observation site on the skin with light, and a light receiving element for receiving reflected light of the irradiated light from the observation site. Image pickup means incident on the image pickup means, conversion means for converting an image signal from the image pickup means into a colorimetric signal, image display means for outputting and displaying an image processed based on the image signal from the image pickup means, and the colorimetric measurement And a colorimetric information display unit for displaying colorimetric information processed based on the signal.
【００１１】これにより、１つの受光素子を介して撮像
機能と測色機能とを合わせ持つことで、装置の取り扱い
が簡易となる。また、小型化された、安価な装置を得る
ことができる。また、撮像機能および測色機能のための
大半の部品が共通化されているため、部品の補修、更新
に際して、補修、更新前に得られていた表面状態情報と
肌色情報との対応関係が損なわれるおそれが少ない。ま
た、従来の測色装置と異なり撮像部位と同一の部位につ
いて測色するため、狙った部位（位置）を確実に測色す
ることができ、しみ部位の測色等を好適に行うことがで
きる。[0011] Thus, by having the image pickup function and the colorimetric function together through one light receiving element, the handling of the apparatus is simplified. Also, a miniaturized and inexpensive device can be obtained. Further, since most of the parts for the image pickup function and the color measurement function are shared, the correspondence between the surface state information and the skin color information obtained before the repair or update is damaged when the parts are repaired or updated. Less likely to be Further, unlike the conventional colorimetric device, colorimetry is performed on the same site as the imaged site, so that the targeted site (position) can be reliably measured, and the coloration of the blotted site can be suitably performed. .
【００１２】この場合、前記照明手段は、前記撮像手段
の前方に前記観察部位に向けて略環状に配列され、略垂
直方向から観察部位を照明する複数の撮像用発光ダイオ
ードと、該複数の撮像用発光ダイオードの外側の略同一
平面上に略環状に配列され、該撮像用発光ダイオードに
比べて斜め方向から該観察部位を照明する複数の測色用
発光ダイオードとからなると、拡散照明によって得られ
る画像は皮膚表面の凹凸による陰影がなく、測色用の画
像として好適であり、一方、直接照明によって得られる
画像は生成される陰影によって皮膚表面の凹凸を明瞭に
映し出し、きめ等の撮像用の画像として好適である。こ
こで、略環状に配列とは、観察部位あるいは受光中心を
囲うように配列する意であり、環状のみでなく矩形状に
配列するものも含む。In this case, the illuminating means is arranged in front of the imaging means in a substantially annular shape toward the observation site, and a plurality of imaging light-emitting diodes for illuminating the observation site from a substantially vertical direction, and the plurality of imaging devices. When a plurality of colorimetric light emitting diodes, which are arranged in a substantially annular shape on the outer side of the light emitting diode for illumination and which illuminate the observation region from an oblique direction as compared with the light emitting diode for imaging, are obtained by diffuse illumination. The image has no shade due to the unevenness of the skin surface and is suitable as an image for color measurement, while the image obtained by direct illumination clearly shows the unevenness of the skin surface due to the generated shadow, and is used for imaging such as texture. It is suitable as an image. Here, the term “arranged in a substantially annular shape” means an arrangement so as to surround the observation site or the light receiving center, and includes not only an annular arrangement but also a rectangular arrangement.
【００１３】このとき、前記撮像用発光ダイオードは、
該観察部位に対して垂直線から７．５°〜１０．５°の
傾斜角度で照射し、前記測色用発光ダイオードは、前記
観察部位に対して垂直線から１５°〜１８°の傾斜角度
で照射するように構成してなると、より好ましい。At this time, the imaging light emitting diode is
Irradiation is performed on the observation site at a tilt angle of 7.5 ° to 10.5 ° from a vertical line, and the colorimetric light emitting diode is tilted at an angle of 15 ° to 18 ° from the vertical line to the observation site. It is more preferable that the irradiation is performed in step 1.
【００１４】また、本発明に係る皮膚表面状態観察装置
において、前記受光素子はカラーＣＣＤであると、装置
が簡易であって保守がし易くかつ安価で小型化できて好
ましい。In the skin surface condition observing device according to the present invention, it is preferable that the light receiving element is a color CCD because the device is simple, easy to maintain, inexpensive and compact.
【００１５】また、本発明に係る皮膚表面状態観察装置
において、前記変換手段は、前記撮像手段より得られる
画像情報と測色装置より得られる測色情報とを用いて予
め重回帰分析して得た変換行列を用いて画像信号と測色
信号とを線形変換で関係付けてなると、簡易かつ好適に
画像信号から測色信号を得ることができる。Further, in the apparatus for observing a skin surface state according to the present invention, the conversion means is obtained by performing a multiple regression analysis in advance using the image information obtained by the image pickup means and the color measurement information obtained by the color measurement device. When the image signal and the colorimetric signal are related by linear conversion using the above conversion matrix, the colorimetric signal can be easily and preferably obtained from the image signal.
【００１６】この場合、前記変換手段は、さらにシェー
ディング補正部を有すると、観察部位のうちシェーディ
ングを回避することができない周辺部の画像情報を有効
に利用して測色することができて好適である。In this case, if the conversion means further has a shading correction section, it is possible to effectively use the image information of the peripheral portion of the observation site where shading cannot be avoided, and it is preferable. is there.
【００１７】[0017]
【発明の実施の形態】本発明に係る皮膚表面状態観察装
置の好適な実施の形態（以下、本実施の形態例とい
う。）について、図を参照して、以下に説明する。BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the skin surface condition observing apparatus according to the present invention (hereinafter referred to as an example of the present embodiment) will be described below with reference to the drawings.
【００１８】本実施の形態例に係る皮膚表面状態観察装
置１０は、図１に示すように、カメラ（撮像手段）１
２、電源ボックス１４、キャプチャボード１６およびコ
ンピュータ１８を有する。コンピュータ１８は、出力装
置（画像表示手段、測色情報表示手段）としてのＣＲＴ
２０を有する。As shown in FIG. 1, a skin surface condition observing apparatus 10 according to the present embodiment has a camera (imaging means) 1
2, a power supply box 14, a capture board 16 and a computer 18. The computer 18 is a CRT as an output device (image display means, colorimetric information display means).
Have twenty.
【００１９】まず、カメラ１２について説明する。First, the camera 12 will be described.
【００２０】カメラ１２は、図２に示すように、筐体２
２内に、照射手段２４、レンズ２６および受光素子２８
を有する。The camera 12 has a housing 2 as shown in FIG.
2, the irradiation means 24, the lens 26 and the light receiving element 28
Have.
【００２１】筐体２２の図２（ａ）中左側先端部には、
円状の開口３０が形成されている。この開口３０は、皮
膚の表面寸法５ｍｍ×７ｍｍ角を被写体の照射範囲とし
ている。At the left end of the housing 22 in FIG. 2 (a),
A circular opening 30 is formed. The opening 30 has a skin surface dimension of 5 mm × 7 mm square as an irradiation range of the subject.
【００２２】照射手段２４は、２つの発光ダイオード群
３２、３４からなる。１つの発光ダイオード群３２は、
開口３０を囲うようにして、矩形状に四方に、３個ずつ
を１単位として配列した合計１２個の発光ダイオード３
２ａ〜３２ｌで構成される。発光ダイオード３２ａ〜３
２ｌは、いずれも白色ＬＥＤ（日亜化学工業社製 型番
ＮＳＰＷ３１０ＡＳ−ＡＱ）である。他の１つの発光ダ
イオード群３４は、発光ダイオード群３２の内側に発光
ダイオード群３２と同様の状態に配列された２×４＝８
個の発光ダイオード３４ａ〜３４ｈで構成される。発光
ダイオード３４ａ〜３４ｈは、いずれも白色ＬＥＤ（日
亜化学工業社製 型番ＮＳＰＷ３１０ＡＳ−ＡＱ）であ
る。発光ダイオード群３２は、皮膚の観察部位からの垂
線（垂直線）、言いかえれば受光中心線Ｌから１５°〜
１８°の傾斜角度θ１で照射するように配置されてお
り、測色の際に用いられる。発光ダイオード群３４は、
受光中心線Ｌから７．５°〜１０．５°の傾斜角度θ２
で照射するように配置されており、きめ等の撮像の際に
用いられる。２つの発光ダイオード群３２、３４は、こ
れらの観察目的に応じて、図示しない切り換え手段によ
って切り換えて使用される。なお、配置する発光ダイオ
ードの種類、個数および配列状態等は、以上説明した範
囲に限定するものではない。The irradiation means 24 comprises two light emitting diode groups 32 and 34. One light emitting diode group 32 is
A total of twelve light emitting diodes 3 are arranged in a rectangular shape so as to surround the opening 30 and three pieces are arranged as one unit.
2a to 32l. Light emitting diodes 32a-3
2l are all white LEDs (model number NSPW310AS-AQ manufactured by Nichia Corporation). The other one light emitting diode group 34 is arranged inside the light emitting diode group 32 in the same state as the light emitting diode group 32, and 2 × 4 = 8.
It is composed of individual light emitting diodes 34a to 34h. Each of the light emitting diodes 34a to 34h is a white LED (model number NSPW310AS-AQ manufactured by Nichia Corporation). The light emitting diode group 32 has a vertical line (vertical line) from the observation site of the skin, in other words, 15 ° from the light receiving center line L.
It is arranged so as to irradiate at an inclination angle θ1 of 18 ° and is used for color measurement. The light emitting diode group 34 is
Inclination angle θ2 of 7.5 ° to 10.5 ° from the light receiving center line L
It is arranged so as to irradiate with, and is used at the time of imaging such as texture. The two light emitting diode groups 32 and 34 are used by being switched by a switching means (not shown) according to their observation purpose. The type, the number, the arrangement state, etc. of the light emitting diodes to be arranged are not limited to the ranges described above.
【００２３】カメラ１２の受光素子２８は、カラーＣＣ
Ｄ（ソニー社製 型番ＩＣＸ４０８ＡＫ）である。The light receiving element 28 of the camera 12 is a color CC.
D (manufactured by Sony Corporation, model number ICX408AK).
【００２４】カメラ１２使用時、観察目的に応じて選択
した発光ダイオード群３２または３４によって観察部位
が照射され、照射した光の観察部位からの反射光を受光
素子２８であるカラーＣＣＤに入射する。When the camera 12 is used, the observation region is illuminated by the light emitting diode groups 32 or 34 selected according to the observation purpose, and the reflected light from the observation region of the emitted light is incident on the color CCD which is the light receiving element 28.
【００２５】ここで、２つの発光ダイオード群３２、３
４を切り換えて照明したときに得られる撮像画像を図３
に示す。Here, two light emitting diode groups 32, 3
FIG. 3 shows a captured image obtained by switching and illuminating
Shown in.
【００２６】２つの撮像画像は、いずれもきめが細かく
整った状態の皮膚を撮像したものである。図３（ａ）
は、照射角度が小さく略皮膚の直上から発光ダイオード
群３４によって照明した場合であり、陰影の存在によっ
て皮溝が鮮明に映し出され、きめの整った状態がよくわ
かる。図３（ｂ）は、照射角度が大きく略皮膚の斜め上
から発光ダイオード群３２によって照明した場合であ
り、陰影が表われておらず、このため、きめの状態がは
っきりと見えない。陰影がないために的確な測色情報を
得ることができる。Each of the two picked-up images is a picked-up image of skin in a finely textured state. Figure 3 (a)
In the case where the irradiation angle is small and the light is illuminated by the light emitting diode group 34 from directly above the skin, the skin groove is clearly projected due to the presence of the shadow, and the texture can be clearly seen. FIG. 3B shows a case where the light emitting diode group 32 illuminates the skin at a large irradiation angle and obliquely above the skin, and no shade is shown, so that the texture is not clearly visible. Since there is no shadow, accurate colorimetric information can be obtained.
【００２７】上記のように構成されるカメラ１２は、装
置構成が簡易であって保守がしやすく、かつ安価で小型
化され、操作性が良好である。The camera 12 configured as described above has a simple device configuration, is easy to maintain, is inexpensive, is small in size, and has good operability.
【００２８】つぎに、キャプチャボード１６およびコン
ピュータ１８について、図１とともにさらに図４を参照
して説明する。Next, the capture board 16 and the computer 18 will be described with reference to FIG. 4 as well as FIG.
【００２９】カメラ１２の画像データ出力信号としての
ビデオデータＮＴＳＣ信号は、キャプチャボード１６に
入力されＲＧＢデジタルデータ（ＲＧＢ信号、画像信
号）に変換される。The video data NTSC signal as the image data output signal of the camera 12 is input to the capture board 16 and converted into RGB digital data (RGB signal, image signal).
【００３０】ＲＧＢデジタルデータは、コンピュータ１
８に取り込まれる。The RGB digital data is stored in the computer 1.
Taken in 8.
【００３１】コンピュータ１８は、シェーディング補正
部３６、変換手段３８および制御演算手段４０を有す
る。The computer 18 has a shading correction section 36, a conversion means 38 and a control calculation means 40.
【００３２】キャプチャボード１６から出力されたＲＧ
Ｂデジタルデータは、そのまま制御演算手段４０で処理
され、必要に応じてＣＲＴ２０に画像表示される（画像
表示手段）。このＣＲＴ２０の画像を観察することによ
り、きめの状態やしみやそばかすなどの色素分布を評価
することができる。RG output from the capture board 16
The B digital data is directly processed by the control calculation means 40 and displayed as an image on the CRT 20 as necessary (image display means). By observing the image of the CRT 20, it is possible to evaluate the texture state and the distribution of pigments such as stains and freckles.
【００３３】一方、測色評価を行うためには、以下の手
順でコンピュータ１８によりＲＧＢデジタルデータが処
理される
シェーディング補正部３６は、THE MUNSELL BOOK OF
COLOR MATTE COLLECTIONの５ＹＲ６／４を用い、各
画素が中心部５０×５０画素の平均ＲＧＢとなるように
比をとり、それを任意の画像に掛けることにより画像の
補正を行う。５ＹＲ６／４を選んだのは、対象とする肌
色の丁度中心付近に位置する色だからである。On the other hand, in order to perform the colorimetric evaluation, the shading correction section 36 in which the RGB digital data is processed by the computer 18 in the following procedure is the THE MUNSELL BOOK OF
Using 5YR6 / 4 of COLOR MATTE COLLECTION, the image is corrected by taking the ratio so that each pixel becomes the average RGB of the central portion 50 × 50 pixels and multiplying it by an arbitrary image. The reason why 5YR6 / 4 is selected is that it is a color located near the center of the target skin color.
【００３４】これにより、ＲＧＢ信号が補正され、照明
ムラが解消され、元来きめ観察用として用いていたカメ
ラ１２の狭い撮像範囲（５ｍｍ×７ｍｍ）の全範囲を活
用して測色用のＲＧＢ画像情報（平均ＲＧＢ信号）を得
ることができる。As a result, the RGB signals are corrected, the illumination unevenness is eliminated, and RGB for color measurement is utilized by utilizing the entire narrow imaging range (5 mm × 7 mm) of the camera 12 originally used for texture observation. Image information (average RGB signal) can be obtained.
【００３５】つぎに、平均ＲＧＢ信号をＸＹＺ信号（測
色信号）に変換するための変換手段３８について説明す
る。Next, the conversion means 38 for converting the average RGB signal into the XYZ signal (colorimetric signal) will be described.
【００３６】カメラのセンサの分光感度は、通常、等色
関数の線形変換で関係付けることができない。本実施の
形態例では、以下の手順により、予め重回帰分析して得
た変換行列を用いて画像信号（平均ＲＧＢ信号）と測色
信号（ＸＹＺ信号）とを線形変換で関係付ける。The spectral sensitivity of the camera sensor cannot usually be related by a linear transformation of the color matching function. In the present embodiment, the image signal (average RGB signal) and the colorimetric signal (XYZ signal) are associated with each other by linear conversion using a conversion matrix previously obtained by multiple regression analysis according to the following procedure.
【００３７】通常、カメラは撮影―表示のシステム全体
でγ＝１．０となるようにＣＲＴのγ特性をキャンセル
するための特性を持たせている。このため、下記式
（１）のように、予め、ＲＧＢを入力値ＸＹＺに対して
線形となるように変換しておく。なお、このとき、ＲＧ
Ｂデータは、シェーディング補正部３６により補正され
た平均ＲＧＢデータを用いる。Normally, the camera has a characteristic for canceling the γ characteristic of the CRT so that γ = 1.0 in the entire photographing-display system. For this reason, RGB is converted in advance so as to be linear with respect to the input values XYZ as in the following expression (1). At this time, RG
The B data uses the average RGB data corrected by the shading correction unit 36.
【００３８】[0038]
【数１】
そして、ＸＹＺそれぞれとＲｌｉｎｅａｒ、Ｇ
ｌｉｎｅａｒ、Ｂｌｉｎｅａｒで重回帰分析を行い、下
記式（２）の変換行列Ｍを求める。[Equation 1] And XYZ and R linear , G
Multiple regression analysis is performed with linear and B linear to obtain a conversion matrix M of the following equation (2).
【００３９】[0039]
【数２】
変換行列Ｍを求めるために必要なＸＹＺおよびＲＧＢ
（式（１）で変換後はＲ ｌｉｎｅａｒ、
Ｇｌｉｎｅａｒ、Ｂｌｉｎｅａｒ）の対データは、肌を
カメラと分光測色器（ＣＭ−１０００ＲＨ）の両方で測
定することによって得た。[Equation 2]
XYZ and RGB required to obtain the transformation matrix M
(R after conversion in equation (1) linear,
Glinear, Blinear) Paired data
Measure with both camera and spectrophotometer (CM-1000RH)
Obtained by setting.
【００４０】変換手段３８は、上記の変換行列Ｍを用い
て平均ＲＧＢデータ（ＲＧＢ信号）をＸＹＺデータ（Ｘ
ＹＺ信号）に変換する。The converting means 38 converts the average RGB data (RGB signal) into XYZ data (X
YZ signal).
【００４１】ＸＹＺデータは制御演算手段４０で処理さ
れ、測色値データ（測色情報）が必要に応じてＣＲＴ２
０に画像表示される（測色情報表示手段）。The XYZ data is processed by the control calculation means 40, and the colorimetric value data (colorimetric information) is sent to the CRT 2 if necessary.
An image is displayed at 0 (colorimetric information display means).
【００４２】なお、上記の変換手段に関して、肌色領域
の色票のデータを用いて予め重回帰分析して得た変換行
列を用いて画像信号と測色信号とを線形変換で関係付け
る方法が提案されている（特願平―１７４６３１号公報
参照）。本発明者らが検討した結果、この色票のデータ
を用いた方法（以下、Ａ法という。）は本実施の形態例
の方法（以下、Ｂ法という。）に比べて重回帰の精度が
高い。例えば、分光測色器で測定して得られた色（Ａ法
については所定の色票。Ｂ法については所定の実際の肌
色。）と各方法で得られる色との色差ΔＥ＊ａｂで精度
をみると、Ａ法が平均０．８９４（最大２．２２３）で
あるのに対してＢ法は平均１．１３７（最大３．５４
８）であり、Ｂ法の方が色差が大きい。しかしながら、
各方法と所定の実際の肌色との色差ΔＥ＊ａｂをみると
Ａ法では平均が例えば５．０程度にまで大きくなり、Ｂ
法の平均１．１３７に比べて著しく精度が低下する。両
者の差異の原因は、重回帰分析のもととなる色の測定対
象として、Ａ法では実際の肌色ではなく色票を用いてい
ることによるものと考えられる。すなわち、実際の肌の
色と肌色領域の色票とは得られるＸＹＺ値は同じでもそ
の分光反射率が異なるという条件等色対であり、かつ、
上記した公知のＡ法ではＣ光源近似の光源下でＲＧＢデ
ータを得ているが、本発明者らの検討においてはＡ法に
ついてもＣ光源とは分光分布が大きく異なる白色ＬＥＤ
を用いてＲＧＢデータを得ているため、比較したＡ法と
Ｂ法との間の実際の肌色の測定精度に大きな差がでたも
のと考えられる。Regarding the above conversion means, a method is proposed in which the image signal and the colorimetric signal are related by linear conversion using a conversion matrix obtained by multiple regression analysis in advance using the data of the color chart of the skin color area. (See Japanese Patent Application No. 174631/1991). As a result of examination by the present inventors, the method using the data of the color chart (hereinafter, referred to as method A) has higher accuracy of multiple regression than the method of the present embodiment (hereinafter, referred to as method B). high. For example, a color difference ΔE * ab between a color obtained by measurement with a spectrocolorimeter (a predetermined color chart for the A method and a predetermined actual skin color for the B method) and the color difference ΔE * ab The average of method A is 0.894 (maximum 2.223), whereas the average of method B is 1.137 (maximum 3.54).
8), and the method B has a larger color difference. However,
Looking at the color difference ΔE * ab between each method and the predetermined actual skin color, in method A, the average increases to about 5.0, and B
The precision is significantly lower than the method average of 1.137. It is considered that the difference between the two is due to the fact that the method A uses the color chart instead of the actual skin color as the color measurement object that is the basis of the multiple regression analysis. That is, the actual skin color and the color chart of the skin color region are equal color pairs that have the same XYZ values but different spectral reflectances, and
In the above-mentioned known method A, RGB data is obtained under a light source close to the C light source, but in the study by the present inventors, the white LED whose spectral distribution is significantly different from that of the C light source in the method A as well.
Since the RGB data is obtained by using, it is considered that there is a large difference in the actual measurement accuracy of the skin color between the compared method A and method B.
【００４３】以上説明した本実施の形態例に係る皮膚表
面状態観察装置は、１つの受光素子を介して撮像機能と
測色機能とを合わせ持つことで、装置の取り扱いが簡易
となる。また、小型化された、安価な装置を得ることが
できる。また、撮像機能および測色機能のための大半の
部品が共通化されているため、部品の補修、更新に際し
て、補修、更新前に得られていた表面状態情報と肌色情
報との対応関係が損なわれるおそれが少ない。また、従
来の測色装置と異なり撮像部位と同一の部位について測
色するため、狙った部位（位置）を確実に測色すること
ができ、しみ部位の測色等を好適に行うことができる。The skin surface condition observing apparatus according to the present embodiment described above has both an image pickup function and a colorimetric function via one light receiving element, so that the apparatus can be handled easily. Also, a miniaturized and inexpensive device can be obtained. Further, since most of the parts for the image pickup function and the color measurement function are shared, the correspondence between the surface state information and the skin color information obtained before the repair or update is damaged when the parts are repaired or updated. Less likely to be Further, unlike the conventional colorimetric device, colorimetry is performed on the same site as the imaged site, so that the targeted site (position) can be reliably measured, and the coloration of the blotted site can be suitably performed. .
【００４４】[0044]
【発明の効果】本発明に係る皮膚表面状態観察装置によ
れば、皮膚の観察部位に光を照射する照明手段と、照射
した光の該観察部位からの反射光を受光して受光素子に
入射する撮像手段と、撮像手段からの画像信号を測色信
号に変換する変換手段と、撮像手段からの画像信号に基
づいて処理した画像を出力表示する画像表示手段と、測
色信号に基づいて処理した測色情報を表示する測色情報
表示手段とを有するため、装置の取り扱いが簡易とな
る。また、小型化された、安価な装置を得ることができ
る。また、撮像機能および測色機能のための大半の部品
が共通化されているため、部品の補修、更新に際して、
補修、更新前に得られていた表面状態情報と肌色情報と
の対応関係が損なわれるおそれが少ない。また、狙った
部位を確実に測色することができ、しみ部位の測色等を
好適に行うことができる。According to the apparatus for observing a skin surface state according to the present invention, an illuminating means for irradiating an observation site on the skin with light, and a reflected light of the irradiated light from the observation site are received and incident on a light receiving element. Image pickup means, conversion means for converting an image signal from the image pickup means into a colorimetric signal, image display means for outputting and displaying an image processed based on the image signal from the image pickup means, and processing based on the colorimetric signal Since the colorimetric information display means for displaying the measured colorimetric information is provided, the device can be handled easily. Also, a miniaturized and inexpensive device can be obtained. Also, since most of the parts for the imaging function and color measurement function are common, when repairing or updating parts,
It is less likely that the correspondence between the surface state information and the skin color information obtained before the repair or update will be lost. Further, it is possible to surely measure the color of the targeted portion, and it is possible to suitably perform the color measurement of the spot portion.
【００４５】また、本発明に係る皮膚表面状態観察装置
によれば、照明手段は、測色用発光ダイオードと、撮像
用発光ダイオードとからなるため、測色用の画像および
きめ等の撮像用の画像を好適に得ることができる。Further, according to the skin surface condition observing apparatus of the present invention, since the illuminating means is composed of the colorimetric light emitting diode and the imaging light emitting diode, the illuminating means is used for imaging the colorimetric image and the texture or the like. An image can be suitably obtained.
【００４６】また、本発明に係る皮膚表面状態観察装置
によれば、変換手段は、撮像手段より得られる画像情報
と測色装置より得られる測色情報とを用いて予め重回帰
分析して得た変換行列を用いて画像信号と測色信号とを
線形変換で関係付けてなるため、簡易かつ好適に画像信
号から測色信号を得ることができる。Further, according to the skin surface condition observing apparatus of the present invention, the conversion means is obtained by performing a multiple regression analysis in advance using the image information obtained by the image pickup means and the color measurement information obtained by the color measurement device. Since the image signal and the colorimetric signal are associated with each other by linear conversion using the above conversion matrix, the colorimetric signal can be easily and preferably obtained from the image signal.
【００４７】また、本発明に係る皮膚表面状態観察装置
によれば、変換手段は、さらにシェーディング補正部を
有するため、シェーディングを回避することができない
観察部位のうちの周辺部の画像情報を有効に利用するこ
とができる。Further, according to the skin surface condition observing apparatus of the present invention, since the converting means further has the shading correcting section, the image information of the peripheral part of the observing part in which the shading cannot be avoided becomes effective. Can be used.
【図１】本実施の形態例に係る皮膚表面状態観察装置の
概略構成を示す図である。FIG. 1 is a diagram showing a schematic configuration of a skin surface state observation device according to an embodiment of the present invention.
【図２】図１の装置のカメラの構成を説明するためのも
のであり、図２（ａ）はカメラの部分断面図であり、図
２（ｂ）はカメラを先端側から見た図である。2A and 2B are views for explaining a configuration of a camera of the apparatus of FIG. 1, FIG. 2A is a partial cross-sectional view of the camera, and FIG. 2B is a view of the camera as seen from the front end side. is there.
【図３】図２のカメラの２つの発光ダイオード群を切り
換えて照明したときに得られる撮像画像を説明するため
のものであり、図３（ａ）は傾斜角度の小さい照明の場
合の撮像画像を示し、図３（ｂ）は傾斜角度の大きい撮
像画像を示す。FIG. 3 is a view for explaining a captured image obtained when two light emitting diode groups of the camera of FIG. 2 are switched and illuminated, and FIG. 3 (a) is a captured image in the case of illumination with a small inclination angle. 3B shows a captured image with a large inclination angle.
【図４】本実施の形態例に係る皮膚表面状態観察装置の
構成を示すブロック図である。FIG. 4 is a block diagram showing a configuration of a skin surface state observation device according to the present embodiment.
１０ 皮膚表面状態観察装置 １２ カメラ １６ キャプチャボード １８ コンピュータ ２０ ＣＲＴ ２４ 照射手段 ２８ 受光素子 ３２、３４ 発光ダイオード群 ３２ａ〜３２ｌ、３４ａ〜３４ｈ 発光ダイオード ３６ シェーディング補正部 ３８ 変換手段 ４０ 制御演算手段 10 Skin surface condition observation device 12 cameras 16 capture board 18 Computer 20 CRT 24 Irradiation means 28 Light receiving element 32, 34 light emitting diode group 32a to 32l, 34a to 34h Light emitting diode 36 Shading correction unit 38 conversion means 40 Control calculation means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大西 浩之 東京都品川区西五反田３丁目９番１号 株 式会社資生堂ビューティーサイエンス研究 所内 (72)発明者 嶋田 茂 東京都品川区西五反田３丁目９番１号 株 式会社資生堂ビューティーサイエンス研究 所内 (72)発明者 福岡 正和 東京都品川区西五反田３丁目９番１号 株 式会社資生堂ビューティーサイエンス研究 所内 Ｆターム(参考） 4C038 VA04 VB22 VC02 VC05 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroyuki Onishi 3-9-1 Nishigotanda, Shinagawa-ku, Tokyo Shiseido Beauty Science Research In-house (72) Inventor Shigeru Shimada 3-9-1 Nishigotanda, Shinagawa-ku, Tokyo Shiseido Beauty Science Research In-house (72) Inventor Masakazu Fukuoka 3-9-1 Nishigotanda, Shinagawa-ku, Tokyo Shiseido Beauty Science Research In-house F-term (reference) 4C038 VA04 VB22 VC02 VC05
Claims (6)
と、照射した光の該観察部位からの反射光を受光して受
光素子に入射する撮像手段と、該撮像手段からの画像信
号を測色信号に変換する変換手段と、該撮像手段からの
画像信号に基づいて処理した画像を出力表示する画像表
示手段と、該測色信号に基づいて処理した測色情報を表
示する測色情報表示手段とを有することを特徴とする皮
膚表面状態観察装置。1. An illuminating means for irradiating an observation site on the skin with light, an imaging means for receiving reflected light of the applied light from the observation site and making it incident on a light receiving element, and an image signal from the imaging means. Conversion means for converting into colorimetric signals, image display means for outputting and displaying an image processed based on the image signals from the image pickup means, and colorimetric information for displaying colorimetric information processed based on the colorimetric signals An apparatus for observing a skin surface condition, comprising: a display means.
前記観察部位に向けて略環状に配列され、略垂直方向か
ら観察部位を照明する複数の撮像用発光ダイオードと、
該複数の撮像用発光ダイオードの外側の略同一平面上に
略環状に配列され、該撮像用発光ダイオードに比べて斜
め方向から該観察部位を照明する複数の測色用発光ダイ
オードとからなることを特徴とする請求項１記載の皮膚
表面状態観察装置。2. The plurality of imaging light-emitting diodes, wherein the illuminating means is arranged in a substantially annular shape in front of the imaging means toward the observation site and illuminates the observation site from a substantially vertical direction.
A plurality of colorimetric light-emitting diodes that are arranged in a substantially annular shape outside the plurality of imaging light-emitting diodes in a substantially annular shape and that illuminate the observation site from an oblique direction as compared with the imaging light-emitting diodes. The skin surface condition observing device according to claim 1.
位に対して垂直線から７．５°〜１０．５°の傾斜角度
で照射し、前記測色用発光ダイオードは、前記観察部位
に対して垂直線から１５°〜１８°の傾斜角度で照射す
るように構成してなることを特徴とする請求項２記載の
皮膚表面状態観察装置。3. The imaging light emitting diode irradiates the observation site at a tilt angle of 7.5 ° to 10.5 ° from a vertical line, and the colorimetric light emitting diode emits light to the observation site. 3. The apparatus for observing the skin surface condition according to claim 2, wherein the irradiation is performed at an inclination angle of 15 ° to 18 ° from a vertical line.
を特徴とする請求項１記載の皮膚表面状態観察装置。4. The skin surface condition observing device according to claim 1, wherein the light receiving element is a color CCD.
れる画像情報と測色装置より得られる測色情報とを用い
て予め重回帰分析して得た変換行列を用いて前記画像信
号と前記測色信号とを線形変換で関係付けてなることを
特徴とする請求項１記載の皮膚表面状態観察装置。5. The conversion means uses the conversion matrix obtained by performing multiple regression analysis in advance using the image information obtained by the image pickup means and the color measurement information obtained by the color measurement device, and the image signal and the The skin surface condition observing apparatus according to claim 1, wherein the colorimetric signal and the colorimetric signal are related by linear conversion.
補正部を有することを特徴とする請求項５記載の皮膚表
面状態観察装置。6. The skin surface condition observing apparatus according to claim 5, wherein the conversion means further has a shading correction section.
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|---|---|---|---|
| JP2001218369A JP2003024283A (en) | 2001-07-18 | 2001-07-18 | Skin surface state observing apparatus |
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|---|---|
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