A Method for Cross-media Color Reproduction Based on Spectral Domain Mapping
A color reproduction and spectral domain technology, applied in the field of cross-media color reproduction based on spectral domain mapping, can solve the problems of poor visualization of color gamut and spatial uniformity, poor robustness of color difference, etc., to achieve convenient use and uniform space The effect of good performance and high degree of color gamut visualization
Active Publication Date: 2020-09-22
山东济清科技服务有限公司
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However, the above-mentioned ICS based on metamerism black theory is a nested (Nested) space, resulting in poor visualization of the color gamut and spatial uniformity; at the same time, ICS needs to be constructed under a fixed light source. The problem of poor robustness to chromatic aberration when transforming
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[0044] Accompanying drawing is the specific embodiment of the present invention. Such as Figure 1 to Figure 3 As shown, the method for realizing cross-media color reproduction based on spectral domain mapping includes the following steps:
[0045] 1) Using multivariate statistical analysis methods (such as principal component analysis, independent principal component analysis, non-negative principal component analysis, etc.) to extract the principal components of the spectral characteristics of different CIE lighting bodies, LED, TH and fluorescent lamps, etc., using numerical transformation Construct the required number of virtual light sources in a manner; the specific operation steps are:
[0046] (a) Relative spectral power distribution of light sources such as different CIE illuminants, LED, TH and fluorescent lamps Normalize according to the maximum power value of each light source to obtain a normalized set of light source spectral power ;Normalization process to ...
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The invention relates to the technical field of spectral domain mapping, in particular to a method for implementing cross-media color reproduction based on spectral domain mapping. The method includes the steps of 1) constructing virtual light sources; 2) establishing a chrominance and color gamut space; 3) determining whether a CIE Lab value is within the chrominance and color gamut space of a target device; 4) calculating CIE Lab tristimulus values corresponding to each multispectral image sample point under other virtual light sources in the chrominance and color gamut space of a digital imaging device; and 5) performing arrangement to form a CIE Lab set. The method of the invention takes full consideration of the actual production requirements and selects the corresponding dimension of space; the ICS which solves the problem of poor color difference robustness during the light source conversion is constructed by using the virtual light sources, and a spectral domain description method and a spectral domain mapping method are designed according to the characteristics of the ICS; and the degree of color gamut visualization is high, the spatial uniformity is good, the establishment of a spectral color management system is facilitated, and the usage is relatively convenient for users.
Description
technical field [0001] The invention relates to the technical field of spectral domain mapping, in particular to a method for realizing cross-media color reproduction based on spectral domain mapping. Background technique [0002] With the rapid development and wide application of digital imaging devices such as monitors, scanners, mobile terminals, and digital cameras, cross-media color reproduction has become inevitable in daily life. However, the color rendering mechanism and physical characteristics of different digital imaging devices are inconsistent, and there are large differences between the color ranges (called color gamuts) that can be displayed, resulting in distortion of cross-media color reproduction, which seriously affects the ability to communicate between devices. Conversion and reproduction of color information. The color gamut mismatch between diversified digital imaging devices is the most important factor leading to the distortion of cross-media color ...
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IPC IPC(8): G06T7/90
Inventor 吴光远
Owner 山东济清科技服务有限公司