CN103565419B - The system of selection of color measuring device, method and suitable foundation cream - Google Patents
The system of selection of color measuring device, method and suitable foundation cream Download PDFInfo
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Abstract
The invention provides a kind of color measuring device, it can use video camera to measure exactly, and provides a kind of new skin analysis method.Color measuring device of the present invention comprises: the light source irradiating subject when input color image; Prevent the illumination beyond this light source from penetrating the exterior light intercepting member of subject; With the polarisation filter of normal reflection preventing subject, this polarisation filter is configured at the object side of light source and the object side of coloured image input block on orthogonal direction.
Description
Technical field
The present invention relates to a kind of color measuring device, its for measure the skin or its periphery etc. of people by the color of colour examining thing; Also relate to a kind of skin color extraction figure, it comprises the colouring information obtained by this color measuring device.
Background technology
As the device measuring tested colour solid color, use and directly do not contact the contactless colour meter that tested colour solid just can measure color.Although by using contactless colour meter, the color of four corner can be measured, measuring the color of people's colour of skin or its periphery, or when measuring the color of cosmetics, especially needing to measure the colour of skin and periphery color thereof accurately.
Contactless colour meter is at the light of input reflection within sweep of the eye of colour meter, whole reflected light of input are averaged, result after average with this calculates 3 stimulus values (X, Y, Z) in XYZ color system, then is scaled arbitrary colourity further and exports.
On the other hand, in this type of colour meter, owing to trying to achieve from by the reflected light of colour examining thing with from by the meansigma methods of the reflected light of object beyond colour examining thing, therefore cause average after result be there are differences by the result of colour examining thing with being only, colour examining precision is low.
Therefore, the color measuring device (with reference to patent documentation 1) of the coloured image input block using color video camera etc. is proposed.
Prior art document
Patent documentation
Patent documentation 1: Japanese invention patent No. 3129502 publication
Summary of the invention
For the color measuring device of the video camera employed as one of above-mentioned coloured image input block, the present inventor uses this color measuring device to study skin analysis, find to use video camera to carry out colour examining to the colour of skin, can once measure both shape and color, so be applicable to various uses.Existing colour meter only provides the meansigma methods of color, and such as when taking skin as subject, by using video camera, the uniformity (dispersion) for skin color also can measure, and adds the probability of application.
On the other hand, in the color measuring device of the use video camera of patent documentation 1 record, comprise the subject of Standard colour board and tested colour solid by shooting simultaneously, obtain RGB data.By the way, when ingestion standard colour table, if the light dropping on colour table is different from the light dropping on face, then high-precision colour measurement cannot be carried out.Therefore, error can be produced when being with unexpected light.In addition produce error because the gloss on colour table surface causes luminous reflectance, limit estimating precision and improve.
Problem of the present invention is to provide a kind of color measuring device, and it uses video camera, can measure exactly, and provides a kind of new skin analysis method.
The present inventor carries out research and finds for solving the problem, and for the light from outside, by configuration blocking between camera lens and subject from the intercepting member of the light of outside, colour examining precision can be suppressed to reduce; By configuring polarisation filter in vertical direction, the normal reflection occurring in subject surface can be suppressed.
As mentioned above, by improveing the color measuring device of prior art, obtain the color measuring device that can carry out exactly measuring, and the skin analysis method using this color measuring device is provided.Especially, such as, when taking skin as subject, utilizing the color measuring device employing video camera, the uniformity (dispersion) of skin color can also be measured, and the internal structure of skin can be estimated on this basis.
Color measuring device of the present invention comprises:
Coloured image input block, its shooting subject and Standard colour board;
Arithmetic unit, it comprises the image data memory cell storing the color image data obtained by described coloured image input block, and the color of image that the color image data being stored in described image data memory cell comprises is carried out to the colour examining unit of colour examining; And
Output unit, it exports the colouring information of the subject measured by this colour examining unit,
Described color measuring device has the light source irradiating subject when input color image, prevents the illumination beyond this light source from penetrating the exterior light intercepting member of subject, and polarisation filter;
This polarisation filter is configured at the object side of light source and the object side of coloured image input block with orthogonal direction.
In the present invention, by using above-mentioned color measuring device, following application can be carried out.That is, the skin color extraction figure of another embodiment of the present invention is,
There is the axle that at least two represent skin color information,
Described skin color information is selected from the group comprising skin lightness, skin form and aspect and skin chroma,
The skin color information of the subject that described skin color extraction figure measures with the color measuring device by above-mentioned embodiment coordinates and is shown.
In addition, the system of selection of suitable foundation cream of the present invention, its colouring information represented by above-mentioned skin color extraction figure, selects the foundation cream being applicable to subject's skin.
The skin condition discrimination method of another embodiment of the present invention comprises, and according to the colouring information of the subject's skin obtained by above-mentioned color measuring device, prepares the operation of the dispersion value of the colour of skin; And with the dispersion value of the colour of skin prepared in above-mentioned operation for index, differentiate skin condition.
Utilize the color measuring device of use video camera of the present invention to measure color exactly, and a kind of skin analysis method using this color measuring device can be provided.
Accompanying drawing explanation
Fig. 1 is the flow chart that the color measuring device of present embodiment carries out processing.
Fig. 2 is the photo of the impact of exterior light and the polarisation filter representing that embodiment produces.
Fig. 3 is an example of the skin color extraction figure of present embodiment, and (a) 9 splits mapping graph, (b) 18 splits mapping graph.
Fig. 4 is the photo representing used in an embodiment Standard colour board.
Fig. 5 is the photo at the colour examining position representing used in an embodiment Standard colour board.
Fig. 6 is the photo of the buccal with laser confocal microscope shooting.
Fig. 7 is the chart representing mastoid process number and the viscoelastic dependency relation of skin.
Detailed description of the invention
The color measuring device of embodiment of the present invention comprises: the coloured image input block of shooting subject and Standard colour board; Arithmetic unit, it comprises the image data memory cell of color image data storing and obtained by this coloured image input block, and the color of image comprised in the color image data stored this image data memory cell carries out the colour examining unit of colour examining; And export by the output unit of the colouring information of the subject of this colour examining unit mensuration.
The coloured image input block of shooting subject and Standard colour board uses color video camera usually, but also according to the kind of subject, can use coloured image scanner.Subject is not particularly limited.Particularly preferably the skin of people is subject.
Coloured image input block can take Standard colour board simultaneously, also can separately take.When separately taking, more easily subject can be taken.When separately taking, preferably first taking Standard colour board, and the RGB data of color standard value is stored in color standard value storage part.
The color image data of input is stored in image data memory cell.Image data memory cell can use the memorizer being equipped on computer.
Colour examining unit is utilized to carry out colour examining to the color image data be stored in this image data memory cell.Colour examining unit such as can be used in the application Publication that Japanese invention application that the applicant formerly proposes discloses flat 5-223642(patent documentation 1) disclosed in colour examining unit.
Concrete colour examining unit can comprise color standard value storage part, and it stores the RGB data to the color standard value of Standard colour board colour examining gained; Image zooming-out portion, it extracts the RGB data of Standard colour board image and the RGB data of view data from the color image data being recorded in described image data memory cell; Comparing section, it tries to achieve the difference of the RGB data of the color standard value stored in the RGB data of extracted Standard colour board image and described color standard storage part; And operational part, it uses the RGB data of difference to the skin color extracted of trying to achieve to revise.
The color measuring device of present embodiment solves, when using the color measuring device of video camera etc. to carry out colour examining to subject, because of the colour examining precise decreasing that causes from the impact of the light of outside and the error because causing at subject surface reflection, and cannot the problem of accurate colour examining.
In the present embodiment, preventing the illumination beyond light source from penetrating the exterior light intercepting member of subject by arranging, interdicting the light from outside.By the object side at coloured image input blocks such as the object side of light source and video cameras, orthogonal direction arranges polarisation filter, suppress the reflection produced on subject surface.
In the color measuring device of present embodiment, coloured image input block has the light source for irradiating subject, in addition, also possesses the exterior light intercepting member preventing the illumination beyond light source from penetrating subject.
Light source is not particularly limited, suitably can selects according to coloured image input block.
As long as exterior light intercepting member can interdict exterior light, then its material/size/shape is not particularly limited, when coloured image input block is video camera, preferably uses the video camera with shade.The shape of shade can make suitable change according to the kind of subject, interdicting exterior light.
When the skin that subject is behaved, preferably use can easily interdict the exterior light beyond light source and obtain skin image, with the digital camera of shade.
The color measuring device of present embodiment, at the object side of light source and the object side of coloured image input block, orthogonal direction has polarisation filter.
As polarisation filter, except can using two polarisation filters on orthogonal direction, be not particularly limited, also can use commercially available prod aptly.
As long as the output unit exporting the colouring information of subject can export colouring information, optional use such as display or printer etc.
Fig. 2, for representing in aftermentioned embodiment, because of the set-up mode of polarisation filter, makes the skin image of taken in image change.1) for arranging the situation of polarisation filter on orthogonal direction, 2) polarisation filter is set on orthogonal direction, and is mixed into the situation of exterior light, 3) situation of polarisation filter is set in directions that are parallel to one another, 4) when polarisation filter is not set, the image taken in.
The coloured image 2 acquired when not possessing exterior light intercepting member) in, although be provided with polarisation filter, expression color can not be known because of the impact of the light from outside, there is the part that white is strong.Like this, when not possessing exterior light intercepting member, the precise decreasing of colour examining.
Possessing exterior light intercepting member, and coloured image 4 acquired when not possessing polarisation filter) in, because of the caused texture display of light and shade change and the surface reflection speck of the concavo-convex reflection of skin surface, and high-precision colour examining cannot be realized.There is exterior light intercepting member, and acquiredly when polarisation filter is set in directions that are parallel to one another take the photograph coloured image 3) in, fully can not obtain the reflection inhibition that polarisation filter is set, because there is the caused wrinkle display of the concavo-convex reflection light and shade change of skin surface and surface reflection speck, therefore high accuracy colour examining cannot be realized.
On the other hand, in the color measuring device of embodiment of the present invention, by arranging exterior light intercepting member, and polarisation filter is configured on orthogonal direction, can as 1 of Fig. 2) shown in, get rid of the impact that the impact of exterior light and reflection cause, realize high accuracy colour examining.
Below, according to Fig. 1, flow chart illustrates the example of the step that the color measuring device of present embodiment performs.For the step that color measuring device of the present invention performs, the Japanese invention application formerly proposed the present inventor discloses in flat 5-223642 publication and the open 2002-189918 publication of Japanese invention application and is also illustrated.
The color measuring device of present embodiment, in standard colour examining step S1, in order to obtain the color standard value of Standard colour board with RGB data, utilizes coloured image input block to make a video recording to Standard colour board in advance.
Then, in coloured image input step S2, to subject shooting, or to subject and Standard colour board shooting, RGB data is obtained.
In image extracting step S3, from the RGB data obtained among S1 and S2, extract the RGB data of Standard colour board and the RGB data of subject.
In comparison step S4, the RGB data of the Standard colour board extracted in S3 and the rgb color standard value data of Standard colour board are contrasted, try to achieve that it is poor.
In correction step S5, the RGB data of Standard colour board is revised, the difference of trying to achieve in S4 is minimized, and in the same way the RGB data of subject is revised.
Next, in output step S6, the colouring information through the revised subject of S5 is exported.
In the present embodiment, coloured image input block is connected with the computer as arithmetic unit, and coloured image is ingested after to computer, until all operations exported is undertaken by computer.As computer, can be PC (PC), work station etc., its kind is without particular determination.
By using the color measuring device of above-mentioned illustrated present embodiment, the analysis relevant to skin information can be carried out exactly.
In particular, can make a kind of skin color extraction figure, it can provide optimum cosmetics to subject.
Use the skin color extraction figure based on the colour examining result of the color measuring device of present embodiment at least to have the axle of two expression Skin Color Informations, and show the Skin Color Information of the subject measured by above-mentioned color measuring device in the lump.
Skin color extraction figure of the present invention at least has two and represents the axle of Skin Color Informations, for being plane graph when diaxon, for being axonometric chart when 3 axle.When for plane graph, can display be shown in, also can be used as leaflet and export.When for axonometric chart, can display be shown in, also can be made stereomodel.
Skin information represented by the axle of mapping graph is selected from skin lightness, skin form and aspect and skin chroma.In this mapping graph, show the colouring information obtained by color measuring device of the present invention in the lump, thus the colouring information of subject's skin can be obtained objectively.
As mentioned above, due to the colouring information of subject's skin can be represented objectively, therefore by pre-determining the foundation cream with skin color extraction figure each region respective color, the foundation cream being most suitable for subject's colour of skin can be selected.
Fig. 3 represents the pattern of the skin color extraction figure of present embodiment.Fig. 3 is the skin color extraction figure of two dimension, and y direction represents lightness; X direction represents form and aspect.For making skin color extraction figure of the present invention, realize setting the computer with image data memory cell and colour examining unit, so that above-mentioned plane skin color extraction figure can be exported, and export the skin color information of subject in the lump, thus the colouring information of subject skin can be grasped objectively.
As shown in Fig. 3 (a), by being 9 subregions by region segmentation in advance, and preferred foundation color is determined to each region, thus the foundation cream being suitable for subject can be selected.In addition, also can as shown in Figure 3 (b), by being 18 subregions by region segmentation in advance, and preferred foundation color is determined to each region, thus the selection refinement more of foundation cream can be made.Although be 9 subregions by region segmentation in figure 3, consider the selective color/quantity of foundation cream, at random can be divided into n subregion (n is integer), preferably be divided into more than 6 subregions, be more preferably divided into more than 9 subregions.On the other hand, be preferably divided into below 24 subregions, be more preferably divided into below 18 subregions.
Because color measuring device of the present invention employs video camera, therefore, it is possible to the not getable skin information of the spectrophotometer used when obtaining colour examining in the past, namely about the information of the uniformity (dispersion value of the colour of skin) of the colour of skin.
The method being recorded in Japanese cosmetic association magazine (fragrant Makeup Hui Chi) Vol.20, No.2 (1996) P78-79 such as can be utilized to measure the uniformity of the colour of skin.
As mentioned above, the color measuring device of the application of the invention, can obtain the information relevant to the dispersion value of the colour of skin.Skin information can be differentiated by using the information relevant to the dispersion value of the colour of skin.
Specifically comprise following operation, that is, according to the colouring information of the subject's skin measured by above-mentioned color measuring device, prepare colour of skin dispersion value, and with the colour of skin dispersion value prepared in above-mentioned operation for index is to differentiate skin information.
The corium of skin and the interfacial structure of coat connection are called nipple structure.Structure that be normally mutually combined to form by papillae and trochanterellus, mamillary ~ waveform male-female arrangement.Papillae is also referred to as dermal papilla, is the part that corium invades to epidermis side; The epidermis part outstanding to corium side is referred to as trochanterellus.
Study discovery through the present inventor, the dispersion value of the colour of skin, the particularly colour of skin, the impact by the structure of blood capillary and distribution is very large, and with surround the papilliferous distribution of blood capillary/configure relevant.Specifically, if papilliferous concaveconvex structure is clear, then contacts this concaveconvex structure by the light of skin surface incidence and scattering occurs, obtaining soft focus (softfocus) effect thus; If papillae is regularly arranged, because the distribution of blood capillary is with it together so form the uniform colour of skin, namely form the bright colour of skin that what is called " is glittered " from inside to outside.On the contrary, if nipple structure is smooth, then the not warm colour of skin is formed by the light generation normal reflection of skin surface incidence; If papillae arrangement is sparse, then the distribution of blood capillary is also uneven, causes the colour of skin uneven, therefore causes the dark and gloomy of the colour of skin.
According to above-mentioned knowledge, by with the dispersion value of the colour of skin for index, nipple structure can be estimated.
As mentioned above, the state of skin can be differentiated by presumption nipple structure.That is, when the dispersion value of the colour of skin shows the uniform colour of skin, the concavo-convex state that can estimate nipple structure is clear, and can differentiate that the state of skin is good.On the other hand, when the dispersion value of the colour of skin shows the uneven colour of skin, it is smooth for can estimating nipple structure, and can differentiate that the state of skin is bad.
Below, the process that the color measuring device of embodiments of the present invention carries out is described.
< first operation >
First, the colour table of shooting reference colour, obtains the image of the color characteristics for calculating video camera.
Fig. 4 shows the colour table example of reference colour.In the present embodiment to improve for the purpose of Quantification precision, reference colour colour table is set as the color close to skin color range.Set as follows in the example in fig. 4, after setting the skin color range centered by the average colour of skin, selected skin color range lightness is the partially red i near lower limit with two colors of partially yellow ii and skin color range lightness is the partially red iii of Near The Upper Limit and two these colors of color of partially yellow iv, and is arranged in skin color range corner.
Then, the distinctive color characteristics of video camera is calculated by the image of reference colour colour table.
Above-mentioned color characteristics is the coefficient for being scaled the video camera rgb value as standard, obtains the a11 ~ a33(coefficient matrix shown in lower facial 1).
[several 1]
For the value obtaining a11 ~ a33 needs minimum trichroism Standard colour board, owing to obtaining the image taken four colors, therefore obtain the value of a11 ~ a33 according to the rgb value of this image.
Now, set the specific video camera as standard, make the value of the colour table of the image obtained by standard camera be standard RGB values.Being taken the colour table of Fig. 4 by other video cameras, obtaining the value for making the rgb value of captured image become the a11 ~ a33 of the standard RGB values of standard camera, make this value be and every platform video camera color characteristics that video camera is intrinsic one to one.
Next, measurement example is represented in Figure 5.The colored cylinder seal of Fig. 5 is for locating.Due to inequality of throwing light on, therefore measuring apart from visual field central authorities apart from roughly equal position in an embodiment.The rgb value that the situation hypograph of standard camera locates is directly as standard RGB values.For the video camera beyond standard camera, carry out coefficient matrix a11 ~ a33, it is for being the rgb value of standard camera by the rgb value transform located on image.
Rgb value after the color characteristics intrinsic according to video camera converts, the rgb value taken with standard camera is the value of identical standard.In this stage, eliminate the individual variation between video camera, the unified value for standard camera.
Rgb value is before this intrinsic value of video camera, if standard camera is different, is different values.Therefore, can not be consistent with the value such as measured by the colour measurement device that spectrophotometer etc. is general.Independently being worth to be obtained by machine, needing the second next illustrated operation.
< is transformed to and does not rely on machine and the second operation > meeting the value of common standard (CIE)
As the color system meeting common standard (CIE), be described to be converted into Munsell colour system.Initial by rgb value, be HVC value through XYZ value transform.But, because rgb value is the intrinsic value of standard camera, therefore converting the HVC value that obtains also is value that video camera is intrinsic.This HVC value has strong correlation relation with the value of the Munsell colour system meeting CIE, but its absolute value is unequal.Therefore, for making video camera eigenvalue and the value opening relationships meeting general standard, and the statistical methods such as linear regression analysis are used.
First, the colour examining device of CIE standard (such as: spectral photometric colour measuring device) is utilized to measure colour examining object position, using the standard of its value as measured color value.Then, utilizing standard camera or for being transformed to standard camera value, same position taken by the video camera that camera color characteristic is clear and definite, calculating the rgb value obtained by standard camera.The relational expression (being equivalent to detection line) of the value of colour examining device obtained above and the rgb value of standard camera is prepared with statistical method.
After utilizing any video camera to take new unknown colour examining object, as the first operation, be the rgb value of standard camera by the rgb value transform of video camera, in the second operation, be transformed to HVC value etc. by the rgb value of standard camera, be transformed to value that do not rely on machine, that meet CIE (Munsell value or L*a*b* value etc.) further.
[embodiment]
<1. polarisation filter and exterior light intercepting member >
In the color measuring device of present embodiment, compare the direction of polarisation filter and the impact of exterior light etc. (Fig. 2).In order to compare the external appearance characteristic of color, take in identical colour table in bottom, the visual field.The skin of determination object position behaviour inner forearm.
Represent in table 1, calculate the result of the colour of skin according to the image of Fig. 2, as the spectral photometric colour measuring value of standard and the aberration with standard.The poor value for the index that fades based on Nickerson (Nickerson) of assumed appearance.
[table 1]
Table 1 by the comparison of the measured color value of image gained, and with the aberration of standard
* 1Nickerson fades index I=(C/5) (2 Δ H)+6 (Δ V)+3 (Δ C)
C is the colourity meansigma methods of two colors, and Δ H, Δ V, Δ C represent the difference of Munsell hue, lightness, chroma respectively.
As shown in table 1, when the polarisation filter of configuring external light in vertical direction, minimum with the aberration of standard value, improve estimating precision.
Next, utilize spectral photometric colour measuring meter, as the video camera (video camera 1) of standard and the Face and cheek of precision test video camera (video camera 2) mensuration 87 women, verify the estimating precision of the method for measuring color based on camera review.From the data of 87 subjects, select 79 for creating regression equation, remainder 8 is for testing accuracy.
<2. as the mensuration > of the video camera 1 of standard
Video camera 1 is utilized to take the colour table of Fig. 4, the rgb value of 4 positions according to shooting determining image Fig. 5, the rgb value being standard with this value.Rgb value due to standard camera does not need to mate with standard, is therefore so far the first operation.Formula 2 represents the color characteristics (coefficient matrix) of the video camera as standard.
[several 2]
Next, the colour of skin rgb value obtained by the image of 79 creating regression equation is transformed to HVC value.
In order to obtain the value relational expression with the spectral photometric colour measuring meter not relying on machine, and carry out multiple regression analysis.Each of three attributes of color is analyzed.
In form and aspect calculate, in the Munsell hue of spectral photometric colour measuring (H(JISZ87211964)) for dependent variable, independent variable is the rgb value of video camera 1; HVC value; And effective value can be thought by the erythema index of rgb value transformation calculations, melanin index etc. in presumption.
In lightness calculates, in the Munsell value of spectral photometric colour measuring (V(JISZ87211964)) for dependent variable, independent variable calculates identical with form and aspect.
In chroma calculates, in the Munsell chroma of spectral photometric colour measuring (C(JISZ87211964)) for dependent variable, independent variable calculates identical with form and aspect.
Method of gradual regression according to multiple regression analysis selects independent variable.
The regression equation of result is as follows.
(1) Munsell hue=
0.197 × H-98.370 × (erythema index)-0.223 × (standard deviation of B value)+11.550 ... (formula 3)
Multiple correlation coefficient R=0.820, degree of freedom has adjusted R
2=0.659
(2) Munsell value=
0.019 × (G-value)+3.498 ... (formula 4)
Multiple correlation coefficient R=0.730, degree of freedom has adjusted R
2=0.527
(3) Munsell chroma=
0.003 × (C value)-0.010 × (B value)+4.997 ... (formula 5)
Multiple correlation coefficient R=0.679, degree of freedom has adjusted R
2=0.447
<3. the mensuration > of the video camera 2 of testing accuracy
Video camera 2 is utilized to take the colour table of Fig. 4, the rgb value of 4 positions according to shooting determining image Fig. 5.Obtain the a11 ~ a33 making this value equal with the rgb value of standard camera 1, make it be the color characteristics of video camera 2.The color characteristics (coefficient matrix) of the video camera 2 of the present embodiment is represented with following formula 6.
[several 3]
By the rgb value that the image of 8 people by testing accuracy obtains, utilize color characteristics (coefficient matrix) and (formula 1) of the video camera 2 shown in formula 6, be scaled the rgb value of video camera 1.So far be the first operation of video camera 2.
Next, the variablees such as the erythema index beyond the HVC be transformed to needed for HVC value and regression equation are calculated.
The rgb value of trying to achieve according to the image of video camera 2 is substituted into the regression equation (formula 3 ~ 5) according to the data creation of video camera 1, tries to achieve Munsell hue, lightness, chroma.
[table 2]
The aberration of the color that table 2 is tried to achieve according to the image of video camera 2 and spectral photometric colour measuring meter
Aberration average 1.57
Table 2 represents the value of the presumption result of calculation for 8 people and the spectral photometric colour measuring meter as standard, and the aberration of colour meter and presumed value.Result is good generally, and camera review can be utilized to carry out high accuracy colour examining.Aberration is the value of the index that fades based on Nickerson (Nickerson).
<4. skin color extraction figure establishment and use >
As shown in Figure 3, take the longitudinal axis as lightness, transverse axis is form and aspect, has made 9 subregion skin color extraction figure.At the corner of skin color extraction figure difference configuration standard colour table.
Then, utilize the skin being taken subject by video camera 1, its colouring information is configured at skin color extraction figure, determining it belongs to which cell in 9 subregion skin color extraction figure thus.
Then, by selecting the foundation cream corresponding to cell, the foundation cream being suitable for subject's colour of skin is provided.The foundation cream that prior preparation is corresponding to cell.
For Munsell colour system, the color gamut of the skin color extraction figure of female face is preferably, lightness axis 4.5 ~ 9.0; Hue axis is 9.0R ~ 10.0YR; Chroma axle is 3.0 ~ 5.0.Further Japanese women is suitable for making lightness axis be 5.0 ~ 8.0; Hue axis is 10.0R ~ 10.0YR; Chroma axle is the color gamut of 3.0 ~ 5.0.
For selecting the color gamut of the skin color extraction figure of foundation cream can be not only the tetragon shown in Fig. 3, it also can be circular, polygon.In addition, the border overlay of adjacent color gamut can also be made.
<5. the presumption > of nipple structure
The present inventor, from the observed result of the colour of skin and nipple, finds the dependency relation of the colour of skin and disk shape.
With the opinion of the present inventor etc., if the colour of skin is even, then estimate papillae arrangement evenly; Papilliferous height is consistent; The shape of papillae horizontal cross-section is the circular proper alignment of roughly the same area.
Especially when the lightness of skin or vividness even time, make us feeling " pretty and dazzling moving ", now, the papilliferous number of presumption unit are is many, papillae arrangement evenly, papillae possesses height and it is highly consistent, and the shape of papillae horizontal cross-section is that small size is circular.
According to the opinion of the invention described above people etc., use embodiment of the present invention color measuring device measure the colour of skin as a result, nipple structure can be estimated.Further, according to this nipple Structure identification skin condition, the cosmetics being applicable to skin condition can be differentiated.
< reference example >
The experiment according to nipple Structure identification skin condition that the present inventor does below is described.
(1) mensuration of papillae number
For the Face and cheek of 88 Japanese women subjects of 20 years old age bracket ~ 60 year old age bracket, measure papilliferous number in 2mm × 2mm range of observation.Use laser confocal microscope (VivaScope1500Plus; Lucid company of the U.S. produces) measure, probe is placed in buccal, measures to 180 μm of degree of depth with every 3 μm of depth step, amount to the scope of the 2mm × 2mm of 60 planes.For the most easily seeing in captured image that papillae cross section (circular cross-section of the basal cell encirclement of degree of being highlighted) is observed, count papilliferous number in this plane picture.Typical shooting picture is (but Fig. 6 is the image intercepting 1mm × 1mm from described measured zone) as shown in Figure 6.
(2) the viscoelastic mensuration of skin
At the buccal position identical with measuring papillae quantity of above-mentioned subject, measuring and the recovery value after horizontal direction distortion is applied, in this, as the skin viscoelasticity value of reflection elasticity/elastic force to skin.Specifically, established standards point (position: 0mm) on skin, as fulcrum to horizontal direction with the power tractive skin that 78.6g is heavy, and measures the distance (mm) from normal place to standard point recoil position immediately after this power of removing.This value is more close to 0mm, and represent the restorative better of skin relative level Direction distortion, the elasticity/elastic force of skin is larger.
(3) resolve
Utilize papilliferous number and the skin viscoelasticity value of said determination, and use JMPver.6.0(SAS), carry out correlation analysis and regression analysis (Fig. 7).Consequently, confirm the dependency that there is non-occasionality between papilliferous number and skin viscoelasticity value, knownly can estimate the state relevant to the elasticity/elastic force of skin using papilliferous number as index.
Claims (8)
1. a color measuring device, is characterized in that: comprise
Coloured image input block, its shooting subject and Standard colour board;
Arithmetic unit, it comprises the image data memory cell storing the color image data obtained by described coloured image input block, and the color of image that the color image data being stored in described image data memory cell comprises is carried out to the colour examining unit of colour examining; And
Output unit, it exports the colouring information of the subject measured by this colour examining unit,
Described color measuring device has the light source irradiating subject when input color image, prevents the illumination beyond this light source from penetrating the exterior light intercepting member of subject, and polarisation filter;
Described polarisation filter is configured at the object side of light source and the object side of coloured image input block with orthogonal direction.
2. color measuring device according to claim 1, is characterized in that,
Described coloured image input block is color video camera.
3. utilize color measuring device to carry out a method for colour examining, described color measuring device comprises:
Coloured image input block, its shooting subject and Standard colour board;
Arithmetic unit, it comprises the image data memory cell storing the color image data obtained by described coloured image input block, and the color of image that the color image data being stored in described image data memory cell comprises is carried out to the colour examining unit of colour examining; And
Output unit, it exports the colouring information of the subject measured by this colour examining unit,
Described color measuring device has the light source irradiating subject when input color image, prevents the illumination beyond this light source from penetrating the exterior light intercepting member of subject, and polarisation filter;
Described polarisation filter is configured at the object side of light source and the object side of coloured image input block with orthogonal direction,
The method is characterized in that, comprise the following steps:
Utilize described coloured image input block to take described Standard colour board, obtain the RGB data of described Standard colour board;
Utilize described coloured image input block to take described subject, obtain the RGB data of described subject;
The RGB data of described subject and the described Standard colour board obtained is read from described memory element;
The rgb color standard value data of described arithmetic unit to the RGB data of extracted described Standard colour board and described Standard colour board compare, and obtain that it is poor;
The RGB data of Standard colour board and described subject described in described arithmetic unit correction, makes the difference obtained minimum;
Described output unit exports colouring information and the skin color extraction figure of revised described subject,
Described skin color extraction figure has the axle that at least two represent skin color information,
Described skin color information is selected from the group comprising skin lightness, skin form and aspect and skin chroma.
4. the method for colour examining according to claim 3, is characterized in that,
The axle of described expression skin color information is two axles.
5. the method for colour examining according to claim 4, is characterized in that,
Described skin color information is skin lightness and skin form and aspect.
6. the method for colour examining according to claim 3, is characterized in that,
Described skin color extraction figure is split into the region of below more than 6 subregions, 24 subregions.
7. the method for colour examining according to claim 3, is characterized in that,
Described skin color extraction figure is split into the region of below more than 9 subregions, 18 subregions.
8. a system of selection for suitable foundation cream, its colouring information represented by skin color extraction figure, selects the foundation cream being applicable to subject's skin, and wherein, described skin color extraction figure is generated by the method utilizing color measuring device and carry out colour examining,
Described color measuring device comprises:
Coloured image input block, its shooting subject and Standard colour board;
Arithmetic unit, it comprises the image data memory cell storing the color image data obtained by described coloured image input block, and the color of image that the color image data being stored in described image data memory cell comprises is carried out to the colour examining unit of colour examining; And
Output unit, it exports the colouring information of the subject measured by this colour examining unit,
Described color measuring device has the light source irradiating subject when input color image, prevents the illumination beyond this light source from penetrating the exterior light intercepting member of subject, and polarisation filter;
Described polarisation filter is configured at the object side of light source and the object side of coloured image input block with orthogonal direction,
The feature of the method for this colour examining is, comprises the following steps:
Utilize described coloured image input block to take described Standard colour board, obtain the RGB data of described Standard colour board;
Utilize described coloured image input block to take described subject, obtain the RGB data of described subject;
The RGB data of described subject and the described Standard colour board obtained is read from described memory element;
The rgb color standard value data of described arithmetic unit to the RGB data of extracted described Standard colour board and described Standard colour board compare, and obtain that it is poor;
The RGB data of Standard colour board and described subject described in described arithmetic unit correction, makes the difference obtained minimum;
Described output unit exports colouring information and the skin color extraction figure of revised described subject,
Wherein, described skin color extraction figure has the axle that at least two represent skin color information,
Described skin color information is selected from the group comprising skin lightness, skin form and aspect and skin chroma.
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