Standard Color Patch Test Method for Analyzing the Reducibility of Light Sources

Abstract

The invention discloses a standard color block experimental method for analyzing the reducibility of a light source, which comprises the steps of a, respectively measuring a reflection spectrum of each standard color block under a reference light source; b, respectively measuring a reflection spectrum of each standard color block under a light source to be tested; C, building a color similarity function according to a signal correlation principle and a contribution factor of the human eye color resolution; d, substituting the reflection spectrums measured in the step a and the step b into the color similarity function to calculate, and acquiring the color similarity of the reflection spectrums of each standard color block under irradiation of the light source to be tested and irradiation of the reference light source; and e, analyzing distribution of the color similarity of each standard color block, and judging the reducibility of the light source to be tested on each color block according to the color similarity of each standard color block. The standard color block experimental method is simple, effective and more close to visual perceptions of the human eyes, and analyzes the reducibility of the light source quickly and accurately.

Description

technical field [0001] The invention relates to the field of analyzing the color rendering ability of a light source, in particular to a standard color block experimental method for analyzing the reducibility of a light source based on color similarity. Background technique [0002] The current color rendering index (CRI) for evaluating the quality of light sources has increasingly prominent problems in evaluating the color rendering of light sources. The specific problems of CRI include: [0003] 1. The color test samples used are limited and the 8 color blocks used to calculate the general color rendering index Ra are simple averages of the color differences of medium-saturated color samples. For new LED light sources, the problem of high saturation of each color needs to be considered; [0004] 2. CRI does not consider the influence of high or low correlated color temperature. For example, the Ra of 2000k blackbody or 20000k daylight is 100, but the color rendering is not...

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Problems solved by technology

[0003] 1. The color test samples used are limited and the 8 color blocks used to calculate the general color rendering index Ra are simple averages of the color differences of medium-saturated color samples. For new LED light sources, the problem of high saturation of each color needs to be considered;

[0004] 2. CRI does not consider the influence of high or low correlated color temperature. For example, the Ra of 2000k blackbody or 20000k daylight is 100, but the color rendering is not good;

[0005] 3. CRI does not consider the direction influence of color shift;

[0006] 4. At present, the chromatic aberration formula and chromatic adaptation formula used by CRI are outdated, and there is a lot of evidence that the color rendering index cannot well represent the visual experience of the human eye

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