CN114858280A - Method and system for predicting preference of lipstick color - Google Patents
Method and system for predicting preference of lipstick color Download PDFInfo
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Abstract
The invention discloses a lipstick color preference prediction method and a system, which comprises the steps of collecting the spectral reflectivity of lipstick to be displayed; calculating the hue angle of the lipstick to be displayed in a uniform color space; judging whether the hue angle of the lipstick to be displayed is in the range of the hue angle applicable to the invention; collecting correlated color temperature information of a light source to be used; judging whether the correlated color temperature of the light source to be used is in the range of the correlated color temperature applicable to the invention; according to the hue angle information of the lipstick to be displayed and the correlated color temperature information of the light source to be used, the corresponding estimator value is obtained by combining the lipstick color preference prediction estimation model, thereby realizing the lipstick color preference prediction under the interaction of the sex, the color number and the light source, and further providing a comprehensive and targeted color preference prediction scheme for the field.
Description
Technical Field
The invention belongs to the technical field of LED intelligent illumination, and particularly relates to a lipstick color preference prediction method and a lipstick color preference prediction system based on gender, color number and light source correlated color temperature.
Background
The cosmetic can improve the contrast of the face, modify the defects of the face and influence the visual perception of the face, so that the face looks healthier, is more attractive and is popular with the public. Among all the makeup methods, the lipstick is most prominent in modifying the facial color information, and the frequency of use and scenes are most extensive. With the increasing living standard of the substance and the change of the aesthetic concept of people, the attention of people to lipstick is continuously promoted, and the market capacity is continuously expanded. The plurality of lipstick numbers not only enrich the diversity, but also are important factors referred by people in selecting, purchasing and using the lipstick.
Meanwhile, the rapid development of the LED intelligent lighting technology promotes the perception of people on the preference of lighting colors. Compared with the traditional light source, the LED light source has the advantages of high luminous efficiency, low radiation, long service life and the like, and the technical characteristic of adjustable light color creates possibility for intelligent illumination, can enter the current daily life, further meets the personalized requirements of people, and is also suitable for application scenes such as the display of cosmetics. However, people often make a preference judgment depending on the current lighting conditions of the light source when selecting a lipstick number in a market, and the factor that the color rendering effect of different color numbers under different light sources can generate certain difference is often not paid enough attention.
Besides, the difference of the visual sex between men and women has been studied in the past century and is proved and approved by a large amount of research at present, and the difference of color perception and color discrimination of different bands also affects the judgment of the preference of different sexes for colors. Therefore, it is necessary to search for each sex in the field of evaluation of color preference.
In conclusion, it is important to scientifically and reasonably design a preference prediction method for gender, light source and lipstick color.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a lipstick color preference prediction method and a lipstick color preference prediction system based on gender, color number and light source correlated color temperature.
The technical scheme of the invention is to provide a lipstick color preference prediction method based on gender, color number and light source correlated color temperature, which comprises the following steps:
step 1, measuring the spectral reflectivity of a lipstick number to be displayed;
step 2, calculating a hue angle h of the lipstick to be displayed under a D65 standard light source in a uniform color space L;
step 3, judging whether the hue angle h of the lipstick to be displayed is in the hue angle range applicable to the invention, namely judging h 1 ≤h≤h 2 Whether the method is established or not, if not, the method is not applicable, and if so, the next step is carried out;
step 4, measuring the correlated color temperature CCT of the light source to be used;
step 5, judging whether the correlated color temperature CCT of the light source to be used is in the range of the correlated color temperature applicable to the invention, namely judging the CCT 1 ≤CCT≤CCT 2 Whether the method is established or not, if not, the method is not applicable, and if so, the next step is carried out;
step 6, inputting the hue angle information of the lipstick to be displayed in the step 2 and the correlated color temperature information of the light source to be used in the step 4 into the lipstick color preference prediction quantification model M constructed by the invention 1 、M 2 And M 3 And respectively obtaining preference estimation values suitable for males, females and general population, thereby realizing the preference prediction of the lipstick color under the interaction of the gender, the color number and the light source.
M 1 The male preference estimation model is in the following specific form:
M 1 ＝p1+p2*h+p3*h 2 +p4*CCT
p1＝6.691×10 -1
p2＝3.958×10 -1
p3＝-9.014×10 -3
p4＝1.920×10 -5
wherein M is 1 To be suitable for male preference measures, h is the hue angle of lipstick to be displayed in uniform color space L under light source D65, and CCT is the correlated color temperature of the light source to be used.
M 2 The model for estimating the female preference is specifically as follows:
M 2 ＝p1+p2*h+p3*h 2 +p4/CCT
p1＝8.675
p2＝-3.482×10 -1
p3＝9.108×10 -3
p4＝-2.486×10 3
wherein M is 2 For the female preference estimator, h is the hue angle of the lipstick to be exhibited in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used.
M 3 The specific form of the model for estimating the overall preference is as follows:
M 3 ＝p1+p2*h+p3*ln(CCT)+p4*(ln(CCT))^2
p1＝-4.022×10 1
p2＝2.578×10 -2
p3＝1.043×10 1
p4＝-6.079×10 -1
wherein M is 3 The quantity is estimated for the overall preference, which applies both to males and females, h is the hue angle of the lipstick to be exhibited in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used.
In step 1, the spectral reflectance of the lipstick to be displayed obtained by measurement is subjected to 400nm-700nm wave band information.
Furthermore, in step 2, the uniform color space L is a CAM16-UCS uniform color space.
And, in step 3, h 1 ＝12.0°，h 2 ＝26.5°。
And, in step 5, CCT 1 ＝2500k，CCT 2 ＝6500k。
The invention also provides a lipstick color preference prediction system based on gender, color number and light source correlated color temperature, which comprises the following modules:
the lipstick reflectivity acquisition module to be displayed is used for measuring the spectral reflectivity of lipstick to be displayed;
the lipstick phase angle calculation module to be shown is used for calculating the hue angle h of the lipstick to be shown under a D65 standard light source in the uniform color space L;
a hue angle range judging module for judging whether the hue angle h of the lipstick to be displayed is in the hue angle range applicable to the invention, namely judging h 1 ≤h≤h 2 Whether the method is established or not, if not, the method is not applicable;
the correlated color temperature information acquisition module of the light source to be used is used for measuring the correlated color temperature of the light source to be used;
a correlated color temperature range judging module for judging whether the correlated color temperature CCT of the light source to be used is in the correlated color temperature range applicable to the invention, namely judging the CCT 1 ≤CCT≤CCT 2 If not, the invention is not applicable.
The lipstick color preference prediction module is used for predicting the preference degrees of the lipstick to be displayed and the light source to be used by adopting the three lipstick color preference prediction estimation models constructed by the invention, wherein the preference degrees are suitable for men, women and general population respectively, and the preference quantitative estimation values of the lipstick and the light source under the interaction are measured according to the output result. The method is implemented by inputting the hue angle information of the lipstick to be displayed and the correlated color temperature information of the light source to be used into the three lipstick color preference prediction estimation models constructed by the method, and obtaining the corresponding estimation quantity value through the preference prediction estimation model, thereby realizing the lipstick color preference prediction under the interaction of the sex, the color number and the light source.
M 1 The male preference estimation model is in the following specific form:
M 1 ＝p1+p2*h+p3*h 2 +p4*CCT
p1＝6.691×10 -1
p2＝3.958×10 -1
p3＝-9.014×10 -3
p4＝1.920×10 -5
wherein, M 1 For the preference evaluation value suitable for men, h is the hue angle of the lipstick to be displayed in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used;
M 2 the model for estimating the female preference is specifically as follows:
M 2 ＝p1+p2*h+p3*h 2 +p4/CCT
p1＝8.675
p2＝-3.482×10 -1
p3＝9.108×10 -3
p4＝-2.486×10 3
wherein M is 2 Estimating a quantitative value for the female preference, wherein h is a hue angle of the lipstick to be displayed under a light source D65 in a uniform color space L, and CCT is a correlated color temperature of the light source to be used;
M 3 the specific form of the model for estimating the overall preference is as follows:
M 3 ＝p1+p2*h+p3*ln(CCT)+p4*(ln(CCT))^2
p1＝-4.022×10 1
p2＝2.578×10 -2
p3＝1.043×10 1
p4＝-6.079×10 -1
wherein M is 3 The quantity is estimated for the overall preference, which applies both to males and females, h is the hue angle of the lipstick to be exhibited in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used. And in the lipstick reflectivity collection module to be displayed, the spectral reflectivity of the lipstick to be displayed obtained by measurement adopts 400nm-700nm wave band information.
Moreover, in the lipstick hue angle calculation module to be shown, the uniform color space L adopts a CAM16-UCS uniform color space.
Furthermore, in the hue angle range determination module, h 1 ＝12.0°，h 2 ＝26.5°。
Furthermore, in the correlated color temperature range judgment module, CCT 1 ＝2500k，CCT 2 ＝6500k。
Compared with the prior art, the invention has the following beneficial effects:
the lipstick color preference prediction method based on gender, color system and light source correlated color temperature provided by the invention is based on the lipstick color characteristics to be displayed and the correlated color temperature index of the light source, and takes three preference prediction estimation models as means, thereby realizing comprehensive and accurate prediction and evaluation of the lipstick color preference to be displayed under the interaction of gender, color number and light source, and further providing a comprehensive and targeted color preference prediction scheme for the field.
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FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
The following provides a detailed description of embodiments of the invention, taken in conjunction with the accompanying drawings.
The lipstick color preference prediction method based on gender, color number and light source correlated color temperature provided by the embodiment shown in fig. 1 is based on the lipstick color characteristics to be displayed and the correlated color temperature index of the light source, and takes three preference prediction estimation models as means, thereby realizing comprehensive and accurate prediction and evaluation of the lipstick color preference to be displayed under the interaction of the gender, the color number and the light source.
The embodiment employs 5 kinds of LED light sources having different correlated color temperatures as light sources to be used: the correlated color temperatures are 2500K, 3500K, 4500K, 5500K and 6500K respectively; taking 3 types of lipstick numbers sold in the market as lipstick numbers to be displayed, wherein the lipstick numbers belong to a bright red system, an orange red system and a sweetened bean paste color system respectively; the accuracy of the lipstick color preference prediction method based on gender, color number and light source correlated color temperature is explained by taking the psychophysics experiment result as a model checking basis. It should be noted that the present invention is not limited to the above light source and lipstick, and the method is also applicable to other LED light sources or other color number lipsticks.
When the technical scheme of the invention is implemented, the technical scheme can be automatically operated by a person skilled in the art by adopting a computer software technology. The method flow provided by the embodiment comprises the following steps:
1) measuring the spectral reflectivity of the lipstick to be displayed, and adopting 400nm-700nm wave band information;
in the embodiment, the lipstick numbers of 3 kinds of thermal pins are used as the lipstick numbers to be displayed, and the spectral reflectivity of the lipstick to be displayed is obtained in a multispectral reflectivity reconstruction mode. For a related introduction and specific embodiments of the multi-spectral reflectance reconstruction, see: the study on spectral reconstruction of a single RGB image by using a Liangjinxing, dawn-Xia color digital camera [ J ]. optical science and newspaper, 2017,37(9): 363-.
2) Calculating the hue angle h of the lipstick to be displayed under a D65 standard light source in the uniform color space L;
in an embodiment, the hue angle h of a lipstick to be displayed under a D65 standard light source is calculated using CAM16-UCS color space. Specific methods for calculating the hue angle h in the CAM16-UCS Color space include Li C, Li Z, Wang Z, et al, comprehensive Color solutions, CAM16, CAT16, and CAM16-UCS [ J ]. Color Research & Application,2017,42(6):703-718, which is not repeated herein.
3)Judging whether the hue angle h of the lipstick to be displayed is in the hue angle range applicable to the invention, namely judging h 1 ≤h≤h 2 If the determination result is true, the invention is not applicable, and if the determination result is true, the next step is carried out:
in the examples, h 1 ＝12.0°，h 2 ＝26.5°。
4) Measuring a correlated color temperature of a light source to be used;
in an embodiment, a luminometer is used to measure the correlated color temperature of 5 different light sources. They are respectively: 2500K, 3500K, 4500K, 5500K and 6500K.
5) Judging whether the correlated color temperature CCT of the light source to be used is in the range of the correlated color temperature applicable to the invention, namely judging the CCT 1 ≤CCT≤CCT 2 If the determination result is true, the invention is not applicable, and if the determination result is true, the next step is carried out:
in an embodiment, CCT 1 ＝2500K、CCT 2 ＝6500K。
6) Inputting the hue angle information of the lipstick to be displayed obtained in the steps 2) and 4) and the correlated color temperature information of the light source to be used into three lipstick color preference prediction quantification models M constructed by the invention and aiming at different crowds 1 、M 2 And M 3 In the method, preference prediction suitable for males, females and the whole population is obtained respectively, and lipstick color preference prediction under the interaction of the gender, the color number and the light source is realized.
M 1 The male preference estimation model is in the following specific form:
M 1 ＝p1+p2*h+p3*h 2 +p4*CCT
p1＝6.691×10 -1
p2＝3.958×10 -1
p3＝-9.014×10 -3
p4＝1.920×10 -5
wherein M is 1 The quantitative value is estimated for male preference, h is the hue angle of the lipstick to be displayed under the light source D65 in the uniform color space L, and CCT is the correlated color temperature of the light source to be used.
M 2 The model for estimating the female preference is specifically as follows:
M 2 ＝p1+p2*h+p3*h 2 +p4/CCT
p1＝8.675
p2＝-3.482×10 -1
p3＝9.108×10 -3
p4＝-2.486×10 3
wherein M is 2 For the female preference estimator, h is the hue angle of the lipstick to be exhibited in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used.
M 3 The specific form of the model for estimating the overall preference is as follows:
M 3 ＝p1+p2*h+p3*ln(CCT)+p4*(ln(CCT))^2
p1＝-4.022×10 1
p2＝2.578×10 -2
p3＝1.043×10 1
p4＝-6.079×10 -1
wherein M is 3 To estimate the amount of total liking, which applies to both men and women, h is the hue angle of the lipstick to be exhibited in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used.
To further prove the technical advantages of the method in predicting the preference of lipstick color, psychophysics experiments are adopted, and the preference of men, women and general population for lipstick color respectively obtained by the psychophysics experiments and the predicted estimate value M of the preference of lipstick color in three categories of 6) are calculated by a correlation coefficient R method 1 、M 2 、M 3 PEARSON correlation coefficient therebetween. The specific implementation is as follows: taking the 5 types of light sources to be used as experimental light sources and the 3 types of hot lipstick numbers as experimental objects, and carrying out psychophysics preference evaluation experiments, wherein the specific experimental modes are as follows:
1) the method comprises the steps of carrying out experiments in a darkroom, wherein gray background cloth is distributed on the periphery of an experimental area, the three hot color numbers of lipstick are used as experimental objects, a female is used as an experimental model, the lipstick is smeared on lips in the experimental process, the real use scene of the lipstick is simulated, and meanwhile, the whole course of the experiment covers other facial features of the model wearing eyeshade as much as possible, so that the interference is avoided. The two intelligent LED light sources respectively form an angle of 45 degrees with the central axis of an experimenter, and the faces of the intelligent LED light sources are uniformly illuminated. And the top of each lamp box is provided with a light-emitting hardware for generating a specified experimental light source. The observer can freely move in the specified area of the experiment, thereby comprehensively and finely observing the color of the lips of the model after the lipstick is coated.
2) In the experiment process, experimenters can change the lipstick number of the model and the correlated color temperature of the experiment light source according to the specified sequence, and an observer needs to record the evaluation of the lip color of the model under each experiment scene in an experiment record table according to the evaluation rule specified by the experiment. The evaluation rule is specifically as follows:
and (4) scoring by adopting seven-level evaluation, the user is very disliked to correspond to 1 point, the user is very like to correspond to 7 points, and the preference degree is higher when the number is larger from 1 to 7. After the observer observes the color of the lip lipstick of the experimenter for a period of time, the observer can make a corresponding score. Meanwhile, other experimenters can continuously remind the observer to pay attention to the lipstick color of the lips of the model as much as possible, and the interference of other facial features is eliminated.
3) The total number of observers selected in the experiment is 60, and the proportion of male to female is 1: 1, and all have normal vision. Before each experiment, the experimenter will speak the experimental situation by mouth. During the experiment, an observer observes the lipstick color of the lip of the model under a corresponding light source and then performs preference evaluation, then closes eyes until the experimenter changes the next lipstick color number and the experiment light source, the observer observes for a period of time again and then performs preference evaluation, and the step is repeated until the last group of experiment scenes. The total of 5 (light sources) × 3 (lipstick numbers) ═ 15 sets of experimental scenes.
4) After the experiment is finished, the preference evaluation scores of all observers for the lipstick colors are counted so as to calculate the PEARSON correlation coefficient between the subjective evaluation value and the lipstick color preference prediction estimation value constructed by the invention, and the experimental result is shown in the following table 1, wherein the larger the numerical value is, the higher the preference score of the lipstick colors under the lipstick-light source combination is.
TABLE 1 subjective evaluation of observer preference test results
The subjective evaluation values of the favorability of observers with different sexes for different light sources and lipstick color number combinations can be obtained through the psychophysics experiments, and the three types of lipstick color favor prediction estimation values M constructed by the method and the subjective evaluation values are further calculated 1 、M 2 And PEARSON correlation coefficient between M3, as shown in table 2 below. The result shows that the correlation coefficient values between the subjective evaluation value and the model estimation value are all above 0.89, and the lipstick color preference prediction model based on the gender, the color system and the light source correlated color temperature, which is constructed by the method, is proved to have extremely high accuracy, so that the method disclosed by the invention is proved to have strong technical advantages in the lipstick color preference prediction aspect.
Table 2 correlation coefficient between subjective evaluation value and model estimation value
| Pearson correlation coefficient | |
| M 1 Male preference | 0.895 |
| M 2 Female preference | 0.921 |
| M 3 Overall preference | 0.961 |
The invention also provides a lipstick color preference prediction system based on gender, color number and light source correlated color temperature, which comprises the following modules:
the lipstick reflectivity acquisition module to be displayed is used for measuring the spectral reflectivity of lipstick to be displayed;
the lipstick phase angle to be displayed calculation module is used for calculating the hue angle h of the lipstick to be displayed under the D65 standard light source in the uniform color space L;
a hue angle range judging module for judging whether the hue angle h of the lipstick to be displayed is in the hue angle range applicable to the invention, namely judging h 1 ≤h≤h 2 Whether the method is established or not, if not, the method is not applicable;
the correlated color temperature acquisition module of the light source to be used is used for measuring the correlated color temperature CCT of the light source to be used;
a correlated color temperature range judging module for judging whether the correlated color temperature CCT of the light source to be used is in the correlated color temperature range applicable to the invention, namely judging the CCT 1 ≤CCT≤CCT 2 Whether the method is established or not, if not, the method is not applicable;
the lipstick color preference prediction module is used for predicting the preference degree under the combination of the lipstick color number with interaction and the light source correlated color temperature by adopting the three color preference prediction estimation models which are constructed by the method and aim at different crowds, and quantitatively estimating the preference degree of the lipstick color according to the output result. The method is realized by inputting the hue angle information of the lipstick to be displayed and the correlated color temperature of the light source to be used into the three preference prediction estimation models constructed by the invention, obtaining the corresponding estimation quantity value through the color preference prediction estimation model, and realizing the lipstick color preference prediction under the interaction of the sex, the color number and the light source.
M 1 The male preference estimation model is in the following specific form:
M 1 ＝p1+p2*h+p3*h 2 +p4*CCT
p1＝6.691×10 -1
p2＝3.958×10 -1
p3＝-9.014×10 -3
p4＝1.920×10 -5
wherein M is 1 For the preference evaluation value suitable for men, h is the hue angle of the lipstick to be displayed in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used;
M 2 the model for estimating the female preference is specifically as follows:
M 2 ＝p1+p2*h+p3*h 2 +p4/CCT
p1＝8.675
p2＝-3.482×10 -1
p3＝9.108×10 -3
p4＝-2.486×10 3
wherein M is 2 Estimating a quantitative value for the female preference, wherein h is a hue angle of the lipstick to be displayed under a light source D65 in a uniform color space L, and CCT is a correlated color temperature of the light source to be used;
M 3 the specific form of the model for estimating the overall preference is as follows:
M 3 ＝p1+p2*h+p3*ln(CCT)+p4*(ln(CCT))^2
p1＝-4.022×10 1
p2＝2.578×10 -2
p3＝1.043×10 1
p4＝-6.079×10 -1
wherein M is 3 The quantity is estimated for the overall preference, which applies both to males and females, h is the hue angle of the lipstick to be exhibited in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used. Furthermore, in the lipstick reflectivity collection module to be displayed, the measured spectrum of the lipstick to be displayed is obtainedThe reflectivity adopts the information of 400nm-700nm wave band.
Moreover, in the lipstick hue angle calculation module to be shown, the uniform color space L adopts a CAM16-UCS uniform color space.
Furthermore, in the hue angle range determination module, h 1 ＝12.0°，h 2 ＝26.5°。
In the correlated color temperature range judgment module of the light source to be used, CCT1 is 2500k, and CCT2 is 6500 k.
The specific implementation of each module corresponds to each step, and the detailed description of the invention is omitted.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A method for predicting a preference of a lipstick color, comprising the steps of:
step 1, measuring the spectral reflectivity of lipstick to be displayed;
step 2, calculating a hue angle h of the lipstick to be displayed under a D65 standard light source in a uniform color space L;
step 3, judging whether the hue angle h of the lipstick to be displayed is in the set hue angle range, namely judging h 1 ≤h≤h 2 Whether the judgment is true or not, if not, quitting, and if true, performing the next step;
step 4, measuring the correlated color temperature of the light source to be used;
step 5, judging whether the correlated color temperature CCT of the light source to be used is in a set correlated color temperature range, namely judging the CCT 1 ≤CCT≤CCT 2 Whether the judgment is true or not, if not, quitting, and if true, performing the next step;
step 6, inputting the hue angle information of the lipstick to be displayed in the step 2 and the correlated color temperature information of the light source to be used in the step 4 into three constructed lipstick color preference prediction quantities aiming at different crowdsChange model M 1 、M 2 And M 3 In the method, prediction estimation quantity values of male, female and general population on the preference of the lipstick color are respectively obtained, so that the preference prediction of the lipstick color under the interaction of the gender, the color number and the light source is realized;
M 1 the male preference estimation model is in the following specific form:
M 1 ＝p1+p2*h+p3*h 2 +p4*CCT
p1＝6.691×10 -1
p2＝3.958×10 -1
p3＝-9.014×10 -3
p4＝1.920×10 -5
wherein M is 1 For the preference evaluation value suitable for men, h is the hue angle of the lipstick to be displayed in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used;
M 2 the model for estimating the female preference is specifically as follows:
M 2 ＝p1+p2*h+p3*h 2 +p4/CCT
p1＝8.675
p2＝-3.482×10 -1
p3＝9.108×10 -3
p4＝-2.486×10 3
wherein M is 2 Estimating a quantitative value for the female preference, wherein h is a hue angle of the lipstick to be displayed under a light source D65 in a uniform color space L, and CCT is a correlated color temperature of the light source to be used;
M 3 the specific form of the model for estimating the overall preference is as follows:
M 3 ＝p1+p2*h+p3*ln(CCT)+p4*(ln(CCT))^2
p1＝-4.022×10 1
p2＝2.578×10 -2
p3＝1.043×10 1
p4＝-6.079×10 -1
wherein M is 3 Estimate the amount of total preference, which is applicable to both males and females, h is to be displayedThe hue angle of lipstick in the uniform color space L under the light source D65, CCT is the correlated color temperature of the light source to be used.
2. The method of claim 1, wherein the method comprises: in the step 1, the spectral reflectivity of the lipstick to be displayed obtained by measurement adopts 400nm-700nm wave band information.
3. The method of claim 1, wherein the method comprises: in step 2, the uniform color space L is a CAM16-UCS uniform color space.
4. The method of claim 1, wherein the method comprises: in step 3, h 1 ＝12.0°，h 2 ＝26.5°。
5. The method of claim 1, wherein the method comprises: in step 5, CCT 1 ＝2500k，CCT 2 ＝6500k。
6. A system for predicting a color preference for lipstick, comprising:
the lipstick reflectivity acquisition module to be displayed is used for measuring the spectral reflectivity of lipstick to be displayed;
the lipstick phase angle calculation module to be shown is used for calculating the hue angle h of the lipstick to be shown under a D65 standard light source in the uniform color space L;
a hue angle range judging module for judging whether the hue angle h of the lipstick to be displayed is in the set hue angle range, namely judging h 1 ≤h≤h 2 Whether the judgment is true or not, and if not, quitting;
the correlated color temperature information acquisition module of the light source to be used is used for measuring the correlated color temperature CCT of the light source to be used;
a correlated color temperature range judging module of the light source to be used for judging whether the correlated color temperature CCT of the light source to be used is in the set correlated color temperature rangeIn-enclosure, i.e. determining CCT 1 ≤CCT≤CCT 2 Whether the judgment is true or not, and if not, quitting;
the lipstick color favor prediction module is used for adopting the three constructed lipstick color favor prediction estimation models, respectively predicting the favor of the lipstick to be displayed and the favor of the light source to be used, which are suitable for men, women and general population, and measuring the favor quantitative estimation value of the lipstick and the light source under the interaction according to the output result; the realization mode is that the hue angle information of the lipstick to be displayed and the correlated color temperature information of the light source to be used are input into the three constructed lipstick color preference prediction estimation models, and the corresponding estimation quantity value is obtained through the preference prediction estimation models, so that the lipstick color preference prediction under the interaction of the sex, the color number and the light source is realized;
M 1 the male preference estimation model is in the following specific form:
M 1 ＝p1+p2*h+p3*h 2 +p4*CCT
p1＝6.691×10 -1
p2＝3.958×10 -1
p3＝-9.014×10 -3
p4＝1.920×10 -5
wherein M is 1 For the preference evaluation value suitable for men, h is the hue angle of the lipstick to be displayed in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used;
M 2 the model for estimating the female preference is specifically as follows:
M 2 ＝p1+p2*h+p3*h 2 +p4/CCT
p1＝8.675
p2＝-3.482×10 -1
p3＝9.108×10 -3
p4＝-2.486×10 3
wherein M is 2 Estimating a quantitative value for the female preference, wherein h is a hue angle of the lipstick to be displayed under a light source D65 in a uniform color space L, and CCT is a correlated color temperature of the light source to be used;
M 3 is a pair ofThe overall preference estimation model is in the following specific form:
M 3 ＝p1+p2*h+p3*ln(CCT)+p4*(ln(CCT))^2
p1＝-4.022×10 1
p2＝2.578×10 -2
p3＝1.043×10 1
p4＝-6.079×10 -1
wherein M is 3 The quantity is estimated for the overall preference, which applies both to males and females, h is the hue angle of the lipstick to be exhibited in the uniform color space L under the light source D65, and CCT is the correlated color temperature of the light source to be used.
7. The system of claim 6, wherein:
and in the lipstick reflectivity acquisition module to be displayed, the spectral reflectivity of the lipstick to be displayed obtained by measurement adopts 400nm-700nm wave band information.
8. The system of claim 6, wherein:
in the lipstick hue angle calculation module to be shown, the uniform color space L adopts a CAM16-UCS uniform color space.
9. The system of claim 6, wherein:
in the module for judging the hue angle range, h 1 ＝12.0°，h 2 ＝26.5°。
10. The system of claim 6, wherein:
in the correlated color temperature range judging module, CCT1 is 2500k, and CCT2 is 6500 k.
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| CN110836723A (en) * | 2019-10-22 | 2020-02-25 | 华格照明科技（上海）有限公司 | Bronze ware display illumination light quality evaluation method and system |
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