A method for cross-media color reproduction based on spectral domain

Abstract

The invention relates to the technical field of spectral domain mapping, and particularly discloses a method for realizing cross-media color reproduction based on the spectral domain. The method for realizing cross-media color reproduction based on the spectral domain is characterized in that: establishing the chromaticity color gamut space of the target device; judging whether the CIE Lab value of the sample point of the source device is within the chromaticity color gamut space of the target device; The CIE Lab value corresponding to each test sample forms a metameric black spectrum with sample point characteristics; performs dimensionality reduction processing on the metameric black spectrum to obtain a metameric black dimensionality reduction space; in the metamerism black dimensionality reduction space In , it is judged according to the spatial distance whether the dimensionality reduction space value of the test sample is within the dimensionality reduction space value range of the target device. The invention reduces time complexity, has few dimensions, is established by using a spectral color management system, and is relatively convenient for users to use.

Description

(1) 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 the spectral domain. (2) Background technology [0002] With the development of science and technology and the advent of the digital information all-media era, the high-quality transmission and high-fidelity reproduction of colors between diversified color-carrying media has increasingly become the ultimate goal pursued by the fields of display, printing and dyeing, and textiles. In the process of cross-media color reproduction, color gamut mapping has always been the focus of international research in the field of color science and image reproduction. Color gamut refers to the range of colors that can be represented, and is generally divided into two types: chromaticity-based color gamut and spectrum-based color gamut (spectral gamut for short). The color gamut based on chromaticity is often desc...

AI Technical Summary

Problems solved by technology

However, the spectral mapping strategy based on metamerism black compensation is based on pre-calculating the color value of the point to be mapped (such as the LabPQR value) for mapping, while ignoring the influence of chromaticity mapping on the metamerism black space

In the process of chromaticity mapping, not only the chromaticity is affected (that is, the basic spectrum is affected), the original spectrum is subtracted from the basic spectrum after the change, and the metamerism black spectrum has also changed, so it is still in accordance with the original metamerism Black value mapping will inevitably produce human error

At the same time, at some chromaticity points, we will find that the metameric black value corresponding to the chromaticity point is very small, so that it cannot reflect the spectral domain by itself, and can only be searched simply. To solve this problem, it is necessary to increase the measurement points. However, This increases computational complexity and measurement cost

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