CN110836723B - Bronze ware display illumination light quality evaluation method and system - Google Patents
Bronze ware display illumination light quality evaluation method and system Download PDFInfo
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- 229910000906 Bronze Inorganic materials 0.000 title claims abstract description 104
- 239000010974 bronze Substances 0.000 title claims abstract description 104
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000005286 illumination Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000013441 quality evaluation Methods 0.000 title claims abstract description 21
- 230000003595 spectral effect Effects 0.000 claims abstract description 34
- 238000002310 reflectometry Methods 0.000 claims abstract description 18
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- 238000011156 evaluation Methods 0.000 claims description 19
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- 238000002474 experimental method Methods 0.000 description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 238000011160 research Methods 0.000 description 4
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- 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
- G01J1/00—Photometry, e.g. photographic exposure meter
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- 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
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- 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
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
Abstract
The invention discloses a bronze ware exhibition illumination light quality evaluation method and system, which comprises the steps of collecting the spectral reflectivity of a bronze ware to be exhibited; calculating the hue angle of the bronze ware to be displayed in a uniform color space; judging whether the hue angle of the bronze ware to be developed is in the hue angle range applicable to the invention or not; collecting spectral power distribution of a light source to be evaluated; calculating the chromaticity information of the light source to be evaluated in a uniform color space; and for the light source to be evaluated, obtaining a corresponding estimated quantity value by combining the illumination quality estimation model according to the chromaticity information of the light source to be evaluated, and realizing the representation of the illumination quality of the bronze display light source.
Description
Technical Field
The invention belongs to the technical field of LED intelligent illumination, and particularly relates to a bronze display illumination light quality evaluation method and system.
Background
Bronze ware, as a symbolic representation of a world civilization, has gathered the spirit and wisdom of ancient people. As one of four civilized ancient countries, bronze cultural relics continuing to the present are rather reputable and famous worldwide, and a large amount of bronze cultural relics are unearthed all over the country. With the increasing living standard of the materials, the demand of people for mental life is increasing, and the attention of people to cultural heritage, especially to bronze wares, is increasing. Therefore, how to scientifically and reasonably design the exhibition method, show the aesthetic and cultural essence of the bronze ware, meet the aesthetic requirements of people, and become a big subject facing the Chinese workers.
In recent years, rapid development of LED manufacturing technology has promoted progress of bronze ware display lighting technology. 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 exhibition and illumination, so that the LED light source is widely applied to the field of Wenwood nowadays.
Because the bronze ware is buried underground for a long time, the bronze ware has unique 'copper green' color appearance attribute through chemical processes such as oxidation reaction and the like. Therefore, the design method of exhibition of other cultural relics and artworks cannot be mechanically applied to the illumination of the exhibition of bronze wares. In addition, with the increasing depth of the exhibition lighting research, the multi-dimensionality of the LED lighting quality evaluation has been generally agreed by the industry and the academia, that is, when the lighting quality evaluation is performed on the light source, the multi-dimensionality includes the illumination fidelity, the preference, the color discrimination, the naturalness, and the like.
Reference 1. K.Tennissen, "Option: Light quality: Adequay to full file an application-specific function," Lighting Research & Technology 51,656-, (2019).
However, at the present stage, a method for evaluating a bronze display light source from multiple dimensions based on the color appearance characteristics of the bronze device and the cultural attributes of the bronze device does not appear. Related researches for illumination quality evaluation of a bronze ware display light source are blank at present.
In view of the above problems, it is desirable to provide a technical solution for performing multidimensional illumination quality characterization and evaluation on a bronze display illumination source, so as to provide guidance for bronze display illumination design.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a bronze display illumination light quality evaluation method and system.
The technical scheme of the invention is to provide a bronze display illumination light quality evaluation method, which comprises the following steps:
step 1, measuring the spectral reflectivity of a bronze ware to be developed;
step 2, calculating the hue angle h of the bronze ware to be developed under a D65 standard light source in the uniform color space L;
step 3, judging whether the hue angle h of the bronze ware to be exhibited is in a set hue angle range, namely judging h1≤h≤h2If the judgment result is positive, entering the next step, and if the judgment result is negative, exiting;
step 4, measuring the spectral power distribution of the light source to be evaluated;
step 5, calculating the chromaticity information of the light source to be evaluated in the uniform color space S;
step 6, inputting the chromaticity information of the light source to be evaluated in the step 5 into the constructed quantitative model M1、M2And M3In, M1、M2And M3Evaluating the illumination quality of the light source from three different dimensions respectively to obtain the preference degree, the identification degree and the subjective evaluation estimated quantity value of the historical sense of the light source to be evaluated, and further realizing the representation of the illumination quality of the bronze display light source; wherein:
M1the preference estimation model is in the following specific form:
k＝0.5*[1500*(u′-0.20)2+900*(v′-0.46)2-1440*(u′-0.20)*(v′-0.46)]
wherein M is1The preference degree estimator is used for estimating the preference degree, u 'and v' are chromaticity coordinates of the light source to be evaluated in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M2the specific form of the model for identification degree estimation is as follows:
m＝-0.06*[log10(CCT)]2+0.51*log10(CCT)-0.95
wherein M is2To estimate the amount of light for discrimination, Duv is the light to be evaluatedThe source has the shortest distance from a chromaticity point of the source to a black body trajectory line in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M3the specific form of the historical feeling estimation model is as follows:
wherein M is2And estimating the amount of measurement for the historical degree, wherein p (lambda) is the spectral power distribution of the light source to be evaluated, and L (lambda), M (lambda) and S (lambda) are the visual spectrum sensitivity functions of the human eyes under the field of view of 10 degrees proposed by the CIE.
Further, in the step 1, the spectral reflectivity of the bronze ware to be displayed obtained by measurement adopts 400nm-700nm wave band information; and 4, adopting 400nm-700nm wave band information for the measured spectral power distribution of the light source to be evaluated.
Further, in step 2, the uniform color space L adopts a CAM16-UCS uniform color space; in step 5, the uniform color space S is CIE1976 UCS uniform color space.
Further, in step 3, h1＝157.5°，h2＝270.0°。
The invention also provides a bronze ware display illumination light quality evaluation system, which comprises the following modules:
the module for collecting the reflectivity of the bronze ware to be developed is used for measuring the spectral reflectivity of the bronze ware to be developed;
the color phase angle calculation module of the bronze ware to be developed is used for calculating the color phase angle h of the bronze ware to be developed under a D65 standard light source in the uniform color space L;
colour phase angleA range judging module for judging whether the hue angle h of the bronze ware to be displayed is in the set hue angle range, namely judging h1≤h≤h2If the result is true, entering the next module, and if the result is false, exiting;
the device comprises a to-be-evaluated light source spectrum information acquisition module, a spectrum power acquisition module and a spectrum power acquisition module, wherein the to-be-evaluated light source spectrum information acquisition module is used for measuring the spectrum power distribution of a to-be-evaluated light source;
the device comprises a to-be-evaluated light source chromaticity information calculation module, a to-be-evaluated light source chromaticity information calculation module and a to-be-evaluated light source chromaticity information calculation module, wherein the to-be-evaluated light source chromaticity information calculation module is used for calculating chromaticity information of a to-be-evaluated light source in a uniform color;
the illumination quality evaluation module is used for evaluating the preference degree, the identification degree and the history feeling of the light source to be evaluated by adopting the three constructed illumination quality estimation models and measuring the illumination quality of the light source to be evaluated according to the output result, and the realization mode is that the chromaticity information of the light source to be evaluated is input into the three constructed illumination quality estimation models M1、M2And M3Obtaining a corresponding estimated quantity value through an illumination quality estimation model, and realizing the representation of the exhibition and illumination performance of the light source to be evaluated; wherein:
M1the preference estimation model is in the following specific form:
k＝0.5*[1500*(u′-0.20)2+900*(v′-0.46)2-1440*(u′-0.20)*(v′-0.46)]
wherein M is1The preference degree estimator is used for estimating the preference degree, u 'and v' are chromaticity coordinates of the light source to be evaluated in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M2the specific form of the model for identification degree estimation is as follows:
m＝-0.06*[log10(CCT)]2+0.51*log10(CCT)-0.95
wherein M is2Estimating a quantity value for the degree of identification, wherein Duv is the shortest distance between a chromaticity point of a light source to be evaluated and a black body trajectory line in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M3the specific form of the historical feeling estimation model is as follows:
wherein M is3And estimating the amount of measurement for the historical degree, wherein p (lambda) is the spectral power distribution of the light source to be evaluated, and L (lambda), M (lambda) and S (lambda) are the visual spectrum sensitivity functions of the human eyes under the field of view of 10 degrees proposed by the CIE.
Further, in the module for collecting the reflectivity of the bronze ware to be developed, the measured spectral reflectivity of the bronze ware to be developed adopts the information of the 400nm-700nm wave band; in the light source spectral information acquisition module to be evaluated, 400nm-700nm wave band information is adopted for the measured spectral power distribution of the light source to be evaluated.
Further, in the bronze ware hue angle calculation module to be developed, the uniform color space L adopts a CAM16-UCS uniform color space; in the module for calculating the chromaticity information of the light source to be evaluated, the uniform color space S adopts CIE1976 UCS uniform color space.
Further, in the hue angle range determination module, h1＝157.5°，h2＝270.0°。
Compared with the prior art, the invention has the following beneficial effects:
the technical scheme for evaluating the quality of the illumination light for the bronze ware exhibition is based on the color characteristics of the bronze ware to be exhibited and adopts three illumination quality estimation models as means, so that the illumination quality of the bronze ware exhibition light source is comprehensively and accurately represented, and a comprehensive and targeted bronze ware exhibition light source evaluation method is further provided for the field.
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FIG. 1 is a flow chart of an embodiment of the present invention;
fig. 2 is a real shot of an experimental visual environment in an embodiment of the invention.
Detailed Description
The following provides a detailed description of embodiments of the invention, taken in conjunction with the accompanying drawings.
The technical scheme for evaluating the quality of the bronze ware display illumination light provided by the embodiment shown in fig. 1 is based on the color characteristics of the bronze ware to be displayed and adopts three illumination quality estimation models as means to realize the representation of the illumination quality of the bronze ware display light source, thereby providing a comprehensive and targeted bronze ware display light source evaluation method for the field.
The embodiment adopts 3 types of LED light sources with different chromaticity attributes as light sources to be evaluated: the first type is 7 LED light sources with the same color temperature (3000K) and different Duv characteristics, the second type is 7 LED light sources with the same color temperature (4000K) and different Duv characteristics, and the third type is 10 LED light sources with different correlated color temperatures (2700K-4300K) and different Duv characteristics; three typical bronze wares (incense burner, small incense burner and copper mirror) are used as objects to be displayed, and the accuracy of the bronze ware display illumination light quality evaluation method provided by the invention is explained by taking the psychophysics experimental result as a model test basis. It should be noted that the present invention is not limited to the above light sources and objects, and the method is also applicable to other LED light sources or other bronze devices.
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 bronze ware to be developed, and adopting the information of the 400nm-700nm wave band;
in the embodiment, three types of typical bronze wares (incense burner, small incense burner and copper mirror) are used as bronze wares to be displayed, and the spectral reflectivity of bronze wares to be displayed is obtained by means of multi-spectral reflectivity reconstruction. 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 bronze ware to be exhibited under a D65 standard light source in the uniform color space L;
in an embodiment, the hue angle h of the bronze ware to be exhibited under a D65 standard light source is calculated by using a 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 bronze ware to be developed is in the hue angle range applicable to the invention, namely judging h1≤h≤h2Whether the method is established or not, if not, the method is not applicable, and if so, the next step is carried out;
in the examples, h1＝157.5°，h2270.0 degrees, the hue angle h of the bronze ware to be exhibited (incense burner, small incense burner and copper mirror) under the D65 standard light source is 168.3 degrees-253.0 degrees, and the hue angle h is within the range set by the invention.
4) Measuring the spectral power distribution of a light source to be evaluated, and adopting 400nm-700nm wave band information;
in the embodiment, an X-Rite i1 Pro spectrophotometer is adopted to measure the spectral power distribution of 3 types of LED light sources to be evaluated with different chromaticity attributes, and the wavelength range is 400nm-700 nm. They are respectively:
7 LED light sources with same color temperature (3000K) and different Duv (0.015, 0.010, 0.005, 0, -0.005, -0.010, -0.015) characteristics;
7 LED light sources with same color temperature (4000K) and different Duv (0.015, 0.010, 0.005, 0, -0.005, -0.010, -0.015) characteristics;
③ 10 LED light sources with different correlated color temperatures and different Duv characteristics, as shown in Table 1.
TABLE 1 light source to be evaluated of the third category in the examples
| Serial number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| CCT | 3000K | 3000K | 3000K | 4000K | 4000K | 4000K | 2700K | 3300K | 3700K | 4300K |
| Duv | -0.015 | 0 | 0.005 | -0.015 | 0 | 0.005 | 0 | 0 | 0 | 0 |
5) Calculating chromaticity information of a light source to be evaluated in the uniform color space S;
in the embodiment, the CIE1976 UCS color space is adopted to calculate the relevant chromaticity information such as CCT, Duv, chromaticity coordinates (u 'and v'), and the like of all the light sources to be evaluated.
6) Inputting the chromaticity information of the light source to be evaluated obtained in the step 5) into three quantitative models M which are constructed by the invention and used for evaluating the illumination quality of the light source from different dimensions1、M2And M3And obtaining the preference degree, the identification degree and the historical perception estimation value of the light source to be evaluated, and further realizing the representation of the illumination quality of the bronze display light source.
M1The preference estimation model is in the following specific form:
k＝0.5*[1500*(u′-0.20)2+900*(v′-0.46)2-1440*(u′-0.20)*(v′-0.46)]
wherein M is1For preference estimators, u 'and v' are color spaces of the illuminant to be evaluated in CIE1976 UCSThe chromaticity coordinate in between, CCT is the correlated color temperature of the light source to be evaluated.
M2The specific form of the model for identification degree estimation is as follows:
m＝-0.06*[log10(CCT)]2+0.51*log10(CCT)-0.95
wherein M is2And for estimating the amount of the identification degree, Duv is the shortest distance between the chromaticity point of the light source to be evaluated and the black body track line in the CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated.
M3The specific form of the historical feeling estimation model is as follows:
wherein M is3Estimating a quantity value for the historical degree, wherein p (lambda) is the spectral power distribution of the light source to be evaluated; l (λ), M (λ), S (λ) are the spectral sensitivity functions of human eye vision under 10 ° field of view proposed by the commission internationale de L' eclairage CIE, and specific data can be found in the CIE technical report: CIE.fundamental colorimetric diagrams with physiological axes-Part 1[ J].2006.。
In order to further prove the technical advantages of the method in evaluating the illumination quality of the light source for developing and aging the bronze ware, a subjective comparison experiment is adopted, and the preference, the identification degree and the historical feeling subjective evaluation value of an observer on the bronze ware obtained by the subjective experiment are calculated by a method of a correlation coefficient R and three types of illumination in 6)Mass estimation quantity M1、M2And M3PEARSON correlation coefficient therebetween. The specific implementation is as follows: the 3 types of light sources to be evaluated are taken as experimental light sources, and 3 subjective comparison experiments are respectively carried out and are marked as experiment 1, experiment 2 and experiment 3. The experimental modes of the 3 subjective comparative experiments are the same, and the specific experimental modes are as follows:
1) and (3) carrying out experiments in a dark room, wherein the three types of bronze wares to be developed are used as experimental objects, and each type of experimental object comprises 2 bronze wares with consistent color and appearance, and 6 experimental objects are used in total. 3 different types of bronze wares are taken as a group and are placed in two adjacent standard Light boxes Light-Cube (50cm multiplied by 60cm, and the periphery and the bottom of the Light boxes are all neutral gray) according to the same placing mode. Experimental visual Environment live-action figure As shown in figure 2, the top of each lamp box is provided with a light-emitting hardware for generating a designated experimental light source. The observer sits on a chair located 90cm from the center of the two light boxes and simultaneously observes the bronze ware in the two light boxes.
2) In the experiment process, the left and right lamp boxes adopt different light sources for illumination, and an observer needs to record the evaluation of each experiment scene in the experiment record table according to the evaluation rules (like degree, identification degree and history feeling) of 3 dimensions. The evaluation rule is specifically as follows:
preference degree: after the observer observes the bronze wares in two light boxes simultaneously for a period of time, the observer prefers which bronze ware in which light box, and then hooks under the corresponding table (forced selection, must select one from two, the same below).
Identification degree: after the observer observes the bronze wares in two light boxes simultaneously for a period of time, the observer considers that the bronze wares in which light box can exhibit more color and texture details, and hooks under the corresponding table.
History feeling: after the observer simultaneously observes the bronze wares in two lamp boxes for a period of time, the observer thinks that the bronze wares in which lamp box have more historical smell and classical charm, then makes a hook under the corresponding table.
3) For each experiment, 30 observers with normal vision (90 observers in total) were selected, and each observer performed the experimentThe same treatment is carried out: dark adaptation was carried out 5 minutes before the start of the experiment, during which the experimenter introduced the experimental situation by oral means. During experiment, the observer evaluates each group of experiment scenes according to the evaluation rule in 2), the experiment scenes are randomly adjusted (the interval between every two different experiment scenes is debugged for 20 seconds), and the observer is in a closed-eye state during scene change until the observer finishes evaluating the last group of experiment scenes. In experiment 1, there were 21 groups in total
3000K experiment scene, 21 groups in experiment 2
4000K Experimental Scenario, total 45 groups in experiment 3
Experimental scenarios of different light source characteristics.
4) The subjective evaluation of the observers in each experiment is subjected to numerical normalization by adopting a Thurston V statistical method so as to calculate a PEARSON correlation coefficient between the subjective evaluation value and the illumination quality model estimation value constructed by the invention, and the normalization result is shown in Table 2, wherein the larger the numerical value is, the more the observers selecting the light source in the dimension are. For a relevant introduction to the Thurston V statistical method and methods of use, see: L.L. Thurstone, "A law of comparative details," pharmacological review 101,266(1994), the present invention is not repeated.
TABLE 2 observer subjective evaluation normalization results
The bronze ware of an observer can be obtained through the subjective experimentLike degree, identification degree and subjective evaluation value of historical sense, and further calculates three kinds of estimated lighting quality values M constructed by the method1、M2And M3PEARSON correlation coefficient therebetween, as shown in table 3. The results show that the average values of the correlation coefficients between the subjective evaluation values and the model estimation values are all above 0.89, and the illumination quality evaluation model (M) for the bronze ware exhibition light source constructed by the invention is proved1、M2And M3) The method has extremely high accuracy, and further proves that the method has strong technical advantages in the aspect of evaluating the illumination quality of the bronze ware display light source.
TABLE 3 correlation coefficient between subjective evaluation values and model estimation values
| Pearson correlation coefficient | Experiment 1 | Experiment 2 | Experiment 3 | Mean value of |
| M1Preference degree | 0.93 | 0.97 | 0.91 | 0.94 |
| M2Identification degree of | 0.82 | 0.96 | 0.92 | 0.90 |
| M3Feeling of history | 0.81 | 0.95 | 0.92 | 0.89 |
The invention also provides a lighting quality evaluation system for the bronze display light source, which comprises the following modules:
the module for collecting the reflectivity of the bronze ware to be developed is used for measuring the spectral reflectivity of the bronze ware to be developed;
the color phase angle calculation module of the bronze ware to be developed is used for calculating the color phase angle h of the bronze ware to be developed 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 bronze ware to be exhibited is in the hue angle range set by the invention, namely judging h1≤h≤h2If the result is true, entering the next module, and if the result is false, not applying the method;
the device comprises a to-be-evaluated light source spectrum information acquisition module, a spectrum power acquisition module and a spectrum power acquisition module, wherein the to-be-evaluated light source spectrum information acquisition module is used for measuring the spectrum power distribution of a to-be-evaluated light source;
the device comprises a to-be-evaluated light source chromaticity information calculation module, a to-be-evaluated light source chromaticity information calculation module and a to-be-evaluated light source chromaticity information calculation module, wherein the to-be-evaluated light source chromaticity information calculation module is used for calculating chromaticity information of a to-be-evaluated light source in a uniform color;
and the illumination quality evaluation module is used for evaluating the preference degree, the identification degree and the history feeling of the light source to be evaluated by adopting the three illumination quality estimation models constructed by the invention and measuring the illumination quality of the light source to be evaluated according to the output result. The method is realized by inputting the chromaticity information of the light source to be evaluated into three illumination quality estimation models M constructed by the invention1、M2And M3Obtaining a corresponding estimated quantity value through an illumination quality estimation model, and realizing the representation of the exhibition and illumination performance of the light source to be evaluated; wherein:
M1the preference estimation model is in the following specific form:
k＝0.5*[1500*(u′-0.20)2+900*(v′-0.46)2-1440*(u′-0.20)*(v′-0.46)]
wherein M is1The preference degree estimator is used for estimating the preference degree, u 'and v' are chromaticity coordinates of the light source to be evaluated in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M2the specific form of the model for identification degree estimation is as follows:
m＝-0.06*[log10(CCT)]2+0.51*log10(CCT)-0.95
wherein M is2Estimating a quantity value for the degree of identification, wherein Duv is the shortest distance between a chromaticity point of a light source to be evaluated and a black body trajectory line in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M3the specific form of the historical feeling estimation model is as follows:
wherein M is3Estimating the amount of dose for history, p (λ) being the spectral power distribution of the light source to be evaluated, L (λ)) M (lambda) and S (lambda) are visual spectrum sensitivity functions of human eyes under a field of view of 10 degrees proposed by the CIE.
And in the module for collecting the reflectivity of the bronze ware to be developed, the measured spectral reflectivity of the bronze ware to be developed adopts the information of the 400nm-700nm wave band.
In addition, in the hue angle calculation module of the bronze ware to be developed, the uniform color space L adopts a CAM16-UCS uniform color space.
Furthermore, in the hue angle range determination module, h1＝157.5°，h2＝270.0°。
And in the light source spectral information acquisition module to be evaluated, the measured spectral power distribution of the light source to be evaluated adopts 400nm-700nm wave band information.
In addition, in the module for calculating the chromaticity information of the light source to be evaluated, the uniform color space S adopts CIE1976 UCS uniform color space.
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 (8)
1. A bronze ware display illumination light quality evaluation method is characterized by comprising the following steps:
step 1, measuring the spectral reflectivity of a bronze ware to be developed;
step 2, calculating the hue angle h of the bronze ware to be developed under a D65 standard light source in the uniform color space L;
step 3, judging whether the hue angle h of the bronze ware to be exhibited is in a set hue angle range, namely judging h1≤h≤h2If the judgment result is positive, entering the next step, and if the judgment result is negative, exiting;
step 4, measuring the spectral power distribution of the light source to be evaluated;
step 5, calculating the chromaticity information of the light source to be evaluated in the uniform color space S, wherein the chromaticity information comprises the correlated color temperature CCT of the light source to be evaluated, the shortest distance Duv between a chromaticity point of the light source to be evaluated and a black body track line in the color space, and chromaticity coordinates u 'and v';
step 6, inputting the chromaticity information of the light source to be evaluated in the step 5 into the constructed quantitative model M1、M2And M3In, M1、M2And M3Evaluating the illumination quality of the light source from three different dimensions respectively to obtain the preference degree, the identification degree and the subjective evaluation estimated quantity value of the historical sense of the light source to be evaluated, and further realizing the representation of the illumination quality of the bronze display light source; wherein:
M1the preference estimation model is in the following specific form:
k＝0.5*[1500*(u′-0.20)2+900*(v′-0.46)2-1440*(u′-0.20)*(v′-0.46)]
wherein M is1The preference degree estimator is used for estimating the preference degree, u 'and v' are chromaticity coordinates of the light source to be evaluated in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M2the specific form of the model for identification degree estimation is as follows:
m＝-0.06*[log10(CCT)]2+0.51*log10(CCT)-0.95
wherein M is2Estimating a quantity value for the degree of identification, wherein Duv is the shortest distance between a chromaticity point of a light source to be evaluated and a black body trajectory line in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M3estimating models, details, for historical senseThe formula is as follows:
wherein M is3And estimating the amount of measurement for the historical degree, wherein p (lambda) is the spectral power distribution of the light source to be evaluated, and L (lambda), M (lambda) and S (lambda) are the visual spectrum sensitivity functions of the human eyes under the field of view of 10 degrees proposed by the CIE.
2. The evaluation method of the quality of illumination light for bronze display according to claim 1, wherein: in the step 1, the spectral reflectivity of the bronze ware to be displayed obtained by measurement adopts 400nm-700nm wave band information; and 4, adopting 400nm-700nm wave band information for the measured spectral power distribution of the light source to be evaluated.
3. The evaluation method of the quality of illumination light for bronze display according to claim 1, wherein: in the step 2, the uniform color space L adopts a CAM16-UCS uniform color space; in step 5, the uniform color space S is CIE1976 UCS uniform color space.
4. The evaluation method of the quality of illumination light for bronze display according to claim 1, wherein: in step 3, h1＝157.5°，h2＝270.0°。
5. The bronze display illumination light quality evaluation system is characterized by comprising the following modules:
the module for collecting the reflectivity of the bronze ware to be developed is used for measuring the spectral reflectivity of the bronze ware to be developed;
the color phase angle calculation module of the bronze ware to be developed is used for calculating the color phase angle h of the bronze ware to be developed 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 bronze ware to be exhibited is in the set hue angle range, namely judging h1≤h≤h2If the result is true, entering the next module, and if the result is false, exiting;
the device comprises a to-be-evaluated light source spectrum information acquisition module, a spectrum power acquisition module and a spectrum power acquisition module, wherein the to-be-evaluated light source spectrum information acquisition module is used for measuring the spectrum power distribution of a to-be-evaluated light source;
the device comprises a to-be-evaluated light source chromaticity information calculation module, a to-be-evaluated light source chromaticity information calculation module and a to-be-evaluated light source chromaticity information calculation module, wherein the to-be-evaluated light source chromaticity information calculation module is used for calculating chromaticity information of a to-be-evaluated light source in a uniform color;
the illumination quality evaluation module is used for evaluating the preference degree, the identification degree and the history feeling of the light source to be evaluated by adopting the three constructed illumination quality estimation models and measuring the illumination quality of the light source to be evaluated according to the output result, and the realization mode is that the chromaticity information of the light source to be evaluated is input into the three constructed illumination quality estimation models M1、M2And M3Obtaining a corresponding estimated quantity value through an illumination quality estimation model, and realizing the representation of the exhibition and illumination performance of the light source to be evaluated; wherein:
M1the preference estimation model is in the following specific form:
k＝0.5*[1500*(u′-0.20)2+900*(v′-0.46)2-1440*(u′-0.20)*(v′-0.46)]
wherein M is1The preference degree estimator is used for estimating the preference degree, u 'and v' are chromaticity coordinates of the light source to be evaluated in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M2the specific form of the model for identification degree estimation is as follows:
m＝-0.06*[log10(CCT)]2+0.51*log10(CCT)-0.95
wherein M is2Estimating a quantity value for the degree of identification, wherein Duv is the shortest distance between a chromaticity point of a light source to be evaluated and a black body trajectory line in a CIE1976 UCS color space, and CCT is the correlated color temperature of the light source to be evaluated;
M3the specific form of the historical feeling estimation model is as follows:
wherein M is3And estimating the amount of measurement for the historical degree, wherein p (lambda) is the spectral power distribution of the light source to be evaluated, and L (lambda), M (lambda) and S (lambda) are the visual spectrum sensitivity functions of the human eyes under the field of view of 10 degrees proposed by the CIE.
6. The bronze display illumination light quality evaluation system according to claim 5, wherein:
in the reflectance collection module of the bronze ware to be developed, the spectral reflectance of the bronze ware to be developed obtained by measurement adopts 400nm-700nm wave band information; in the light source spectral information acquisition module to be evaluated, 400nm-700nm wave band information is adopted for the measured spectral power distribution of the light source to be evaluated.
7. The bronze display illumination light quality evaluation system according to claim 5, wherein: in the color phase angle calculation module of the bronze ware to be developed, the uniform color space L adopts a CAM16-UCS uniform color space; in the module for calculating the chromaticity information of the light source to be evaluated, the uniform color space S adopts CIE1976 UCS uniform color space.
8. The bronze display illumination light quality evaluation system according to claim 5, wherein: in the module for judging the hue angle range, h1＝157.5°，h2＝270.0°。
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