CN105324068A - Method for evaluating cosmetic effects of cosmetic product on skin - Google Patents
Method for evaluating cosmetic effects of cosmetic product on skin Download PDFInfo
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- CN105324068A CN105324068A CN201480034514.7A CN201480034514A CN105324068A CN 105324068 A CN105324068 A CN 105324068A CN 201480034514 A CN201480034514 A CN 201480034514A CN 105324068 A CN105324068 A CN 105324068A
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- 239000013598 vector Substances 0.000 claims abstract description 44
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0077—Devices for viewing the surface of the body, e.g. camera, magnifying lens
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
- A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/14—Generating the spectrum; Monochromators using refracting elements, e.g. prisms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2803—Investigating the spectrum using photoelectric array detector
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2823—Imaging spectrometer
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
- G01N21/474—Details of optical heads therefor, e.g. using optical fibres
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- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
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- Medical Informatics (AREA)
- Public Health (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Dermatology (AREA)
- General Physics & Mathematics (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Spectrometry And Color Measurement (AREA)
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Abstract
The present invention relates to a method for evaluating the cosmetic effects of a cosmetic product on the skin by determining multi-dimensional vectors from the diffuse reflection spectrum at the surfaces of the reference and the object skin before and after the application, and comparing any indices of relative spectral lengths of the object skin, spectral angles and an entropy after the application of the cosmetic product to the indices before the application of the cosmetic product. The method according to the present invention can evaluate the cosmetic effects of a cosmetic product on the skin with high precision and accuracy, and provide new indices directly linked to customer perception.
Description
Technical field
The present invention relates to the method for assessment of the cosmetic result of cosmetics on skin.
Background technology
Recently, the certain methods of the cosmetic result for measuring cosmetics has been developed.Such as, JP-A-2007-307084 discloses a kind of method that whitening effect is assessed in increase for the whitening degree by measuring the skin color caused because the skin color caused by the blood circulation promoted changes.In the method, whitening effect is determined by the increment rate of average hemoglobin.
JP-A-2008-245666 discloses a kind of method for assessment of skin pigmentation, comprises the step by using video camera to obtain the coloured image of the color chart for adjusting white balance.The method is based on providing the RGB information of coloured image and not instructing the conventional color parameter of uniformity of mottle and skin color.
But consumers' perceptions are very complicated and thus multiple instrument parameter is commonly used to understand consumer and feels and what is expected.And the result obtained by prior art not accurately cannot understand the needs of consumer.
For assessment of the conventional method of the cosmetic result of cosmetics mainly based on the colouring information produced by the spectrum in region or averaged spectrum.But difference can utilize client perception to find by the method based on color analysis in cosmetic applications.
On the other hand, the high spectrum imaging method be combined with spectral modeling mapping graph fractals for the measurement for the melanic non-invasive of human skin method and apparatus and be developed.Such as, JP-A-2010-51589 discloses a kind of method of the non-invasive for measuring the melanic amount in human skin.JP-A-2010-125288 discloses a kind of for the method by using spectrum analysis to create the image for melanoma diagnosis in the mode of non-invasive.JP-A-2010-252904 discloses a kind of for using spectrum analysis to derive the method for distinguishing melanomatous index (index).
High spectrum imaging method has many advantages.Such as, the method be non-invasive, non-contacting and make it possible to realize measure rapidly.In addition, the information on molecular level can be obtained by the method.
Ultra-optical spectrum imaging method has mainly focused on biomedical sector, for the object of the image of freckle malignant melanoma and the pre-diagnostic application of shallow table cancer.But, also in beauty treatment fields, do not study ultra-optical spectrum imaging method so far.
Summary of the invention
The object of this invention is to provide a kind of new method for the cosmetic result on skin with high accuracy and Accuracy evaluation cosmetics.Another object is to provide the New Set being directly linked to client perception.
Above-mentioned purpose of the present invention can be realized by a kind of method for assessment of the cosmetic result of cosmetics on skin, and described method comprises the following steps:
(i) measure the diffuse reflection spectrum of surface of subject's skin before application and reference substance, to obtain the positional information of the surface of subject's skin and reference substance and to comprise the pixel data of diffuse reflection spectrum at pixel place,
(ii) cosmetics are applied to the surface of subject's skin,
(iii) measure the diffuse reflection spectrum of surface of the subject's skin after application, to obtain the positional information of the surface of subject's skin and to comprise the pixel data of diffuse reflection spectrum at pixel place,
(iv) determine multi-C vector according to the diffuse reflection spectrum of surface of the subject's skin before and after application and reference substance,
(v) by assessing the cosmetic result of cosmetics compared with the index before the application of the relative spectral length of the subject's skin after the application of cosmetics, spectral modeling and any index in entropy and cosmetics,
Wherein
The averaged spectrum length of the subject's skin of the spectra length relative to reference substance before and after application uses reference vector to determine according to the multi-C vector of the subject's skin before and after application,
Spectral modeling uses reference vector to determine according to the multi-C vector of the subject's skin before and after application and reference substance, and
Entropy is determined according to spectral modeling, positional information and pixel data.
Step (iv) in application before and after subject's skin and the multi-C vector of reference substance can be the wavelength band place at pixel place by its component irreflexive vector is determined.
Step (v) in application before and after subject's skin relative spectral length (
with
) can be determined by following equation:
Wherein
L
rthe average length of the multi-C vector of reference substance,
L
sbthe average length of the multi-C vector of the subject's skin before application, and
L
sathe average length of the multi-C vector of the subject's skin after application,
Wherein
Wherein
A
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of reference substance,
B
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin before application,
C
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin after application,
N is the total number of wavelength band, and
N is the total number of pixel.
Step (v) in application before spectral modeling (θ
b j) and application after spectral modeling (θ
a j) can be determined by following equation:
Wherein
L
r jthe length of the multi-C vector at a jth pixel place of reference substance,
L
sb jthe length of the multi-C vector at a jth pixel place of the subject's skin before application,
L
sa jthe length of the multi-C vector at a jth pixel place of the subject's skin after application,
θ
b jthe spectral modeling at a jth pixel place of the subject's skin before application,
θ
a jthe spectral modeling at a jth pixel place of the subject's skin after application,
A
i mthe diffuse-reflectance component at i-th wavelength band place of m pixel of reference substance,
B
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin before application,
C
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin after application,
N is the total number of wavelength band, and
N is the total number of pixel.
Step (v) in application before and after entropy can be determined by following equation:
Wherein
Epy
bthe entropy before application,
Epy
athe entropy after application,
Wherein
N (θ
b,k) be that wherein corresponding spectral modeling is less than θ
b,kthe number of pixel,
N (θ
a,k) be that wherein corresponding spectral modeling is less than θ
a,kthe number of pixel, and
N is the total number of pixel
Wherein
K is
with
between the total number of segmentation, wherein
.
The wavelength of diffuse reflection spectrum can in the scope of 450 to 750nm.
Reference substance can be the skin of inner arm.
Subject's skin can be the skin of face.
Cosmetics may be used for topical application.
Cosmetics for topical application can be skin nursing products, for the cosmetic product of skin or sunscreen product.
Skin nursing products can be selected from the group comprising following item: facial milk cleanser (cleanser), skin care liquid (lotion), facial cream (cream), gel (gel), facial film (facialmask), skin highlight product (skinlightener), skin-whitening product (skinwhitener) and elite (serum).Skin nursing products may be used for that skin highlights, skin-whitening, skin bleaching or self-service U.S. black.
Can be that non-is invasive according to method of the present invention.
Method according to the present invention may be used for assessing highlight or whitening effect, for assessment of the protection effect for ultraviolet radiation and for assessment of dressing effect.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of the example of the device used in the present invention.
Fig. 2 shows the block diagram of the spectrometer be arranged on the device shown in Fig. 1.
Detailed description of the invention
After further investigation, the present inventor finds, likely provides a kind of method for the cosmetic result on skin with high accuracy and Accuracy evaluation cosmetics, and likely provides the New Set being directly linked to client perception.
By considering that spectral modeling and spectra length provide analysis result accurately relatively with skin color, the accurate information obtained about the uniformity of skin color and the effect of whitening cosmetics can be made it possible to according to method of the present invention.The method can realize the raising of the quality of data, and consumers' perceptions accurately can be understood due to the parameter from spectral modeling and spectra length.
In addition, method according to the present invention has following advantageous effects: be used to provide lower data-fluctuation during rapid data acquisition time, this time course and lower failure-frequency according to the equipment of method of the present invention.Software for method according to the present invention provides operator-friendly interface, simple and easy navigation for locating, automatic calibration and malfunction indication.
Hereafter, will explain in more detail according to the method for assessment of the cosmetic result of cosmetics on skin of the present invention.
[method for assessment of cosmetic result]
Method for assessment of the cosmetic result of cosmetics on skin according to the present invention comprises the following steps:
(i) measure the diffuse reflection spectrum of surface of subject's skin before application and reference substance, to obtain the positional information of the surface of subject's skin and reference substance and to comprise the pixel data of diffuse reflection spectrum at pixel place,
(ii) cosmetics are applied to the surface of subject's skin,
(iii) measure the diffuse reflection spectrum of surface of the subject's skin after application, to obtain the positional information of the surface of subject's skin and to comprise the pixel data of diffuse reflection spectrum at pixel place,
(iv) determine multi-C vector according to the diffuse reflection spectrum of surface of the subject's skin before and after application and reference substance,
(v) by assessing the cosmetic result of cosmetics compared with the index before the application of the relative spectral length of the subject's skin after the application of cosmetics, spectral modeling and any index in entropy and cosmetics,
Wherein
The averaged spectrum length of the subject's skin of the spectra length relative to reference substance before and after application uses reference vector to determine according to the multi-C vector of the subject's skin before and after application,
Spectral modeling uses reference vector to determine according to the multi-C vector of the subject's skin before and after application and reference substance, and
Entropy is determined according to spectral modeling, positional information and pixel data.
Step (i) and (iii) in, the diffuse reflection spectrum of the subject's skin before and after application and the surface of reference substance is measured with the positional information of the surface obtaining subject's skin and reference substance and the pixel data of diffuse reflection spectrum comprising pixel place.In step, (i) with (iii) the middle diffuse reflection spectrum obtained is relevant to the wavelength in two dimensional surface.
In order to utilize the information at molecular level place, the wavelength of diffuse reflection spectrum is preferably in the scope of 450 to 750nm, and be more preferably in the scope of 500 to 750nm, it is visible-near-infrared spectrum.Visible-near-infrared spectrum comprises the information of the component at the molecular level place forming object.
In the measurement of diffuse reflection spectrum, all predetermined area of space can be scanned.Therefore, exist and also will obtain the probability of unnecessary pixel data.Therefore, preferably, after obtaining pixel data, the pixel data at setted wavelength place with predetermined reflectance should be excluded by filtration.
The reference substance used in the method according to the invention is preferably the skin of inner arm.
Step (iv) in, determine to come the multi-C vector of the diffuse reflection spectrum of the surface of subject's skin before and after self-application and reference substance.Irreflexive vector that subject's skin before and after application and the multi-C vector of reference substance can be the wavelength band places at pixel place by its component is determined.
Step (v) in, the cosmetic result of cosmetics by assessing compared with the index before the application of the relative spectral length of the subject's skin after the application of cosmetics, spectral modeling and any index in entropy and cosmetics.
Relative spectral length and spectral modeling are by " Thespectralimageprocessingsystem (the SIPS)-interactivevisualizationandanalysisofimagingspectrometer data " people such as F.A.Kruse, (1993) RemoteSensingofEnvironment, 44, the spectral modeling mapper (SAM) described in 145-163 page calculates.
Step (v) in application before and after subject's skin relative spectral length (
with
) can determine according to multi-C vector.The change of the clean light absorption of these Length Indications caused by the change of the melanin content in skin.Relative spectral length can be determined by following equation:
Wherein
L
rthe average length of the multi-C vector of reference substance,
L
sbthe average length of the multi-C vector of the subject's skin before application, and
L
sathe average length of the multi-C vector of the subject's skin after application,
Wherein
Wherein
A
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of reference substance,
B
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin before application,
C
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin after application,
N is the total number of wavelength band, and
N is the total number of pixel.
Relative spectral length is longer, and the reflection obtained from skin is more.
Step (v) in application before spectral modeling (θ
b j) and application after spectral modeling (θ
a j) can determine according to the inner product of multi-C vector.The qualitative change of the spectral characteristic between the subject's skin at these spectral modeling indication molecule level places and reference substance, the difference of the ratio of component in the skin such as caused due to the change of the balance between melanin and hematochrome amount.These spectral modeling can be determined by following equation:
Wherein
L
r jthe length of the multi-C vector at a jth pixel place of reference substance,
L
sb jthe length of the multi-C vector at a jth pixel place of the subject's skin before application,
L
sa jthe length of the multi-C vector at a jth pixel place of the subject's skin after application,
θ
b jthe spectral modeling at a jth pixel place of the subject's skin before application,
θ
a jthe spectral modeling at a jth pixel place of the subject's skin after application,
A
i mthe diffuse-reflectance component at i-th wavelength band place of m pixel of reference substance,
B
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin before application,
C
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin after application,
N is the total number of wavelength band, and
N is the total number of pixel.
Spectral modeling is less, and subject's skin is more close to reference substance.
Entropy is one of index of the molecular information of the surface of reflection object skin.The width that this entropy indicates the spectral modeling be associated with the uniformity of skin to distribute.Step (v) in application before and after entropy can be determined by following equation:
Wherein
Epy
bthe entropy before application,
Epy
athe entropy after application,
Wherein
N (θ
b,k) be that wherein corresponding spectral modeling is less than θ
b,kthe number of pixel,
N (θ
a,k) be that wherein corresponding spectral modeling is less than θ
a,kthe number of pixel, and
N is the total number of pixel
Wherein
K is
with
between the total number of segmentation, wherein
.
Entropy is less, and the color of skin is more even.
By arranging percentage ratio in spectral modeling distribution and the threshold value of spectral modeling, uninterested point can be got rid of from analysis.The spectral modeling of subject's skin should be less than threshold value, if make to there is the point with higher thresholds with a certain percentage ratio, then they will be got rid of from impact point.
The color analysis of cosmetics and the application of skin analysis can be used to according to method of the present invention, this is the difference by determining before and after (1) application, and (2) immediately after application with any hourage of the application of cosmetics after difference.
Method according to the present invention is a kind of useful assessment tool, with subject's skin tone, it is by considering that spectral modeling and spectra length provide analysis result accurately relatively.The method can use the parameter from spectral modeling and spectra length to realize the raising of the quality of data for the perception accurately understanding consumer.
[cosmetics]
Method according to the present invention step (ii) in, cosmetics are applied to the surface of subject's skin.Subject's skin is preferably the skin of face.
The cosmetics used in the present invention are preferred for topical application.Cosmetics for topical application can be skin nursing products, for the cosmetic product of skin or sunscreen product.
Skin nursing products are not specially limited, and can be selected from the group comprising following item: Cleansing Foam, skin care liquid, facial cream, gel, facial film and elite.Skin nursing products may be used for that skin highlights, skin-whitening, skin bleaching or self-service U.S. black.
It is surfaces for being applied to human body for highlighting or the synthetic of object of whitening that skin highlights product and skin-whitening product, and is preferably for the cosmetics of topical application on skin or agent.Mean to be applied to the product on skin for the cosmetics of topical application on skin or agent, and can dermatological medicine or accurate medicine be corresponded to.Term " highlight " and " whitening " to mean the institute of the generation of check melanin and/or deposition effective, and comprise the generation of check melanin and reduce the melanin produced.
When skin highlights product or skin-whitening product are after shave lotions, after shave lotion is preferably transparent or preferably has uniform outward appearance.Herein, state " transparent " and mean that not there is any transillumination character departed from caused by refraction or reflection.The transparency of the synthetic of such as after shave lotion and so on can be measured by scopometer.Such as, the portable turbidimeter model 2100P(trade (brand) name manufactured by Hach company can be adopted), to measure the transparent limit of synthetic.When synthetic have scope be from 0 to 250NTU measurement turbidity value time, this synthetic can be regarded as transparent.
Skin highlights product or skin-whitening product are used in cosmetic treatments process, and described process comprises and skin highlighted product or skin-whitening product and be applied to step on skin.Especially, this process is suitable for removing the brown pigment flaw such as caused by external factor and/or the flaw such as caused by internal factor (the such as age increases), and/or is suitable for highlighting brown skin.
The cosmetics used in the present invention can adopt following form: suspension, dispersion liquid; Oil-in-water, Water-In-Oil or multiple emulsion; Gel or mousse; Oily or emulsified gel; The dispersion liquid of vesicle particularly lipid vesicle; Two-phase or multiphase skin care liquid; Spraying; Loose, compact or casting mold powder; Anhydrous mastic.Cosmetics can have following appearance: skin care liquid, facial cream, fat, ointment, ointment, mousse, casting mold or molded solid or compact solid.
Cosmetics can also adopt for the protection of or the form of synthetic of skin of nursing face, cervical region, hands or health.
The cosmetics used in the present invention can comprise the composition usually adopted in cosmetics, such as acid, alkali, salt, pigment, antioxidant, UV absorbent, blood circulation accelerant, metal-chelator, Sebum control agents, powder, astringent, skin soft agent, wetting agent, surfactant, oil, organic solvent, siloxanes, silicone derivative, natural extract, wax etc. from animal or plant derivation.
[device]
The device used in the present invention is described with reference to Fig. 1 and 2.In FIG, 1 is object S.2 is white light sources, and the spectrometer 4 with gap 3 is integrated with ccd video camera 5.Spectrometer 4 is the imaging spectrometers being equipped with transmission grating.The light reflected from a line of measuring object passes through gap 3, is imaged on the optical receiving surface of the ccd video camera 5 serving as detector, and the score that is split is loose.That is, the X-axis of the optical receiving surface of ccd video camera 5 corresponds to the position of a line of measuring object, and Y direction is the spectrum of the light of dispersion.
The detailed construction of spectrometer 4 shown in Figure 2.Gap 3 is made up of the lens 3b and suture body 3a condensing light.In addition, spectrometer 4 is made up of the prism 4b of the transmission grating system between two lens 4a and 4c.Using EM(electron multiplication) ccd video camera, ccd video camera 5 make sensitivity be strengthened to the even low light level.
Because the optics of this device configures as described above, so the diffuse reflection spectrum data of a line of object S can obtain from a frame of ccd video camera.These data are imported into data handling equipment 6.Then, in order to obtain the next frame of ccd video camera, with the optics of this device of short-distance movement, and the diffuse reflection spectrum data of next line is sent to data handling equipment 6.By repeating this operation, likely obtain the diffuse reflection spectrum data of two dimensional surface.In fact, by the mechanism (such as control unit 6b) moved up in the side vertical with a line on the measuring object surface corresponding to X-axis, optics moves substantially continuously, and data are synchronously obtained by ccd video camera 5.
Although not shown, the device used in the present invention is provided with a pair polarising sheet.Light from white light source 2 is polarized linearly by polarising sheet, and is only incident on spectrometer 4 from the vertical linear polarization light component of white light source 2.Therefore, the impact occurring in the irregular reflection of the surface of object S is suppressed.In addition, the direction of polarising sheet can free setting.
Although not shown, the device used in the present invention has auto-focusing (AF) function, always it can to focus in measurement point in the heart.Therefore, the impact of the shade caused by the large scrambling in frequency space relatively can be suppressed on the surface of object S.
The device used in the present invention can be stored in by the diffuse reflection spectrum in the determined wavelength band of the characteristic of spectrometer 4 in the two dimensional image in each pixel.The fundamental length yardstick of two dimensional image is determined by following size: by the optical system amplification determined measurement screen vertical size of the optical slot length in gap 3 and spectrometer 4, to be set by the optical slot width in gap 3 and the driver software of control device 7 the horizontal screen size of determined measurement, ccd video camera 5 a Pixel Dimensions and by the optical slot width in gap 3 and the determined Pixel Dimensions of the optical system amplification of spectrometer 4.Can be obtained by the line sweep of the longitudinal direction perpendicular to optical slot at short notice about the information of position and diffuse reflection spectrum.The analysis of the diffuse reflection spectrum of the destination object obtained makes likely to draw two-dimension spectrum image.Therefore, likely utilize that this device is highlighted wherein exists region that is qualitative or quantitative differences optically in diffuse reflection spectrum.Also likely reconfigure pseudo color image by calculating according to diffuse reflection spectrum and drawing three primary colors element value.
[cosmetic applications]
Various application can be used to according to method of the present invention.Such as, the method can be used to assess cosmetics the highlighting or whitening effect on skin that such as skin highlights product and skin-whitening product and so on.
Also the protection effect for ultraviolet radiation of assessment sunscreen product on skin can be used to according to method of the present invention.
Can also be used to assess the dressing effect of cosmetic product for skin according to method of the present invention.
Example
In more detailed manner the present invention will be described by example.But they should not be interpreted as limiting the scope of the invention.
[device]
High light spectrum image-forming equipment (Tokyo MitakaKohki company limited MSI-03) is used to this research.The details of this device is as follows:
Spectral resolution: 1.51nm,
Spectral region: 450.23-749.95nm,
Measured zone: 16.09mm × 21.52mm,
Spatial resolution: 32.7 μm,
Measuring Time: about 10s,
The power of light source: 150W,
The total number (n) of wavelength band: 199
The total number (N) of pixel: 323736
The total number (K) of segmentation: 80
[for assessment of reference substance and object]
The inner arm of one people is used as the reference substance for measuring.The diffuse reflection spectrum of the surface of inner arm is measured with the positional information of the surface obtaining inner arm and the pixel data of diffuse reflection spectrum comprising pixel place.
Be have selected 30 samples (model) on the both sides of their face with sun speckle by dermatologist.
[for assessment of agreement]
Two kinds of products (one is the effective whitening product of tool, and another kind is the comfort product i.e. not effective product of tool) are applied to the left side of the face of sample and right side 8 weeks.Their face is sooner or later cleaned sample every day with the cleaning course of standard.Application side is selected randomly for each sample.During the test period, sample is prohibited from using any other elite.Their remaining skin care item normally used and cosmetics are retained in their beauty treatment routine.
Before test (T0) and after 8 weeks (T8) measure the diffuse reflection spectrum of surface of the skin of face.Relative spectral length, spectral modeling and entropy after the application of whitening product are determined according to the diffuse reflection spectrum of the skin of face before and after application and the surface of reference substance.
[result]
Averaged spectrum length, average light spectral corner and entropy are determined according to multi-C vector, and show these indexs for whitening product and comfort product in tables 1 and 2.Shown value is average for 30 samples.
The effective cosmetics of not tool (comfort product) at table 1T0 and T8 place
| T0 | T8 | |
| Entropy | 3.1±0.6 | 3.0±0.7 |
| Average light spectral corner | 3.8±1.9 | 3.6±1.6 |
| Averaged spectrum length | 1.0±0.1 | 1.0±0.1 |
The effective cosmetics of tool at table 2T0 and T8 place
| T0 | T8 | |
| Entropy | 3.1±0.6 | 3.0±0.5 |
| Average light spectral corner | 3.8±1.6 | 3.5±1.5 |
| Averaged spectrum length | 1.0±0.1 | 1.0±0.1 |
Show the difference of averaged spectrum length, average light spectral corner and the entropy between T0 and T8 that calculate according to the value in table 1 and 2 in table 3.
The difference between product and whitening product comforted by table 3, T8-T0
| Comfort product | Whitening product | |
| Entropy | 0.01±0.29 | -0.08±0.29 |
| Average light spectral corner | -0.06±0.90 | -0.40±0.95 |
| Averaged spectrum length | 0.01±0.05 | 0.01±0.06 |
By the result of comfort product compared with the result of whitening product, entropy and average spectral modeling significantly reduce.These results illustrate facial purported skin by whitening product by whitening.
Claims (15)
1., for assessment of a method for the cosmetic result of cosmetics on skin, comprise the following steps:
(i) measure the diffuse reflection spectrum of surface of subject's skin before application and reference substance, to obtain the positional information of the surface of subject's skin and reference substance and to comprise the pixel data of diffuse reflection spectrum at pixel place,
(ii) cosmetics are applied to the surface of subject's skin,
(iii) measure the diffuse reflection spectrum of surface of the subject's skin after application, to obtain the positional information of the surface of subject's skin and to comprise the pixel data of diffuse reflection spectrum at pixel place,
(iv) determine multi-C vector according to the diffuse reflection spectrum of surface of the subject's skin before and after application and reference substance,
(v) by assessing the cosmetic result of cosmetics compared with the index before the application of the relative spectral length of the subject's skin after the application of cosmetics, spectral modeling and any index in entropy and cosmetics,
Wherein
The averaged spectrum length of the subject's skin of the spectra length relative to reference substance before and after application uses reference vector to determine according to the multi-C vector of the subject's skin before and after application,
Spectral modeling uses reference vector to determine according to the multi-C vector of the subject's skin before and after application and reference substance, and
Entropy is determined according to spectral modeling, positional information and pixel data.
2. method according to claim 1, is characterized in that, step (iv) in application before and after subject's skin and the multi-C vector of reference substance be that irreflexive vector at the wavelength band place at pixel place is determined by its component.
3. method according to claim 1 and 2, is characterized in that, step (v) in application before and after subject's skin relative spectral length (
with
) determined by following equation:
Wherein
L
rthe average length of the multi-C vector of reference substance,
L
sbthe average length of the multi-C vector of the subject's skin before application, and
L
sathe average length of the multi-C vector of the subject's skin after application,
Wherein
Wherein
A
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of reference substance,
B
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin before application,
C
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin after application,
N is the total number of wavelength band, and
N is the total number of pixel.
4. the method according to any one in claims 1 to 3, is characterized in that, step (v) in application before spectral modeling (θ
b j) and application after spectral modeling (θ
a j) determined by following equation:
Wherein
L
r jthe length of the multi-C vector at a jth pixel place of reference substance,
L
sb jthe length of the multi-C vector at a jth pixel place of the subject's skin before application,
L
sa jthe length of the multi-C vector at a jth pixel place of the subject's skin after application,
θ
b jthe spectral modeling at a jth pixel place of the subject's skin before application,
θ
a jthe spectral modeling at a jth pixel place of the subject's skin after application,
A
i mthe diffuse-reflectance component at i-th wavelength band place of m pixel of reference substance,
B
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin before application,
C
i jthe diffuse-reflectance component at i-th wavelength band place of a jth pixel of the subject's skin after application,
N is the total number of wavelength band, and
N is the total number of pixel.
5. the method according to any one in Claims 1-4, is characterized in that, step (v) in application before and after entropy determined by following equation:
Wherein
Epy
bthe entropy before application,
Epy
athe entropy after application,
Wherein
N (θ
b,k) be that wherein corresponding spectral modeling is less than θ
b,kthe number of pixel,
N (θ
a,k) be that wherein corresponding spectral modeling is less than θ
a,kthe number of pixel, and
N is the total number of pixel
Wherein
K is
with
between the total number of segmentation, wherein
.
6. the method according to any one in claim 1 to 5, is characterized in that, the wavelength of diffuse reflection spectrum is in the scope of 450 to 750nm.
7. the method according to any one in claim 1 to 6, is characterized in that, reference substance is the skin of inner arm.
8. the method according to any one in claim 1 to 7, is characterized in that, subject's skin is the skin of face.
9. the method according to any one in claim 1 to 8, is characterized in that, cosmetics are used for topical application.
10. method according to claim 9, is characterized in that, the cosmetics for topical application are skin nursing products, for the cosmetic product of skin or sunscreen product.
11. methods according to claim 10, is characterized in that, skin nursing products are selected from the group comprising following item: facial milk cleanser, skin care liquid, facial cream, gel, facial film and elite.
12. methods according to any one in claim 1 to 11, it is characterized in that, described method is that non-is invasive.
13. methods according to any one in claim 1 to 12, it is characterized in that, described method is for assessment of highlighting or whitening effect.
14. methods according to any one in claim 1 to 12, it is characterized in that, described method is for assessment of the protection effect for ultraviolet radiation.
15. methods according to any one in claim 1 to 12, it is characterized in that, described method is for assessment of dressing effect.
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| PCT/JP2014/066493 WO2014204007A1 (en) | 2013-06-19 | 2014-06-17 | Method for evaluating cosmetic effects of cosmetic product on skin |
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| CN106370604A (en) * | 2016-09-29 | 2017-02-01 | 上海家化联合股份有限公司 | Human body testing method for testing sunscreen product cleaning capability of cleaning product |
| CN106442331A (en) * | 2016-09-29 | 2017-02-22 | 上海家化联合股份有限公司 | Testing method of waterproof capability of sunscreen product |
| CN106645143A (en) * | 2016-09-29 | 2017-05-10 | 上海家化联合股份有限公司 | Body testing method for sun-screening performance of product containing sun-screening agents |
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| KR102322442B1 (en) * | 2015-03-31 | 2021-11-09 | (주)아모레퍼시픽 | Method for suggesting personalized cosmetic compositon |
| JP6533729B2 (en) | 2015-09-29 | 2019-06-19 | 富士フイルム株式会社 | Skin evaluation apparatus, skin evaluation method and skin evaluation program |
| FR3049350B1 (en) * | 2016-03-23 | 2018-04-20 | L'oreal | METHOD FOR DETERMINING THE COLOR OF A COSMETIC PRODUCT ON A SKIN MODEL |
| CN113080854A (en) * | 2021-03-30 | 2021-07-09 | 苏州优薇孚智能科技有限公司 | Ultraviolet high-sensitivity imaging device for providing sunscreen cosmetic use feedback |
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| JP6437466B2 (en) | 2018-12-12 |
| CN105324068B (en) | 2019-05-10 |
| JP2016529470A (en) | 2016-09-23 |
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