Method and system for carrying out vision perception high-fidelity transformation on color digital image

Abstract

The invention relates to the field of digital image processing, in particular to a method and a system for carrying out vision perception high-fidelity transformation on a color digital image. The method comprises the steps of: (1) acquiring L (Luminance), C (Saturation) and h (hue) of numerical values of pixel colors R (Red), G (Green) and B (Blue) of the color digital image in a CIELAB (International Commission on Lumination Laboratory) space; (2) merging the pixel colors into a hue plane and a luminance sequence; (3) completing expansion of C of the pixel colors; and (4) calculating parameters of the pixel colors of the image and a saturation value CLN obtained through expansion in (3) into values of R, G and B. According to an FECr (First Epos Color) algorithm provided by the invention, under the condition that the boundary of an image color space constituted by three primary colors, namely, red, green and blue, is not changed, colors, which are more sensitive for vision, in the image are calculated and are made relatively more increased in a visible light color vision perception property, colors which are relatively less sensitive for vision perception are calculated and are increased a little or maintained unchanged, and a nonlinear regulation method in such a way can be used for obtaining a relatively obvious effect approaching an actual scene watched in a visible light color space, for image watching.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a method and system for visually perceiving high-fidelity transformation of color digital images. Background technique [0002] The use of digital quantities of the primary colors red, green and blue has been used in electronic devices to capture or display color images for decades. Although the three primary colors are selected to make the display image as faithful as possible to the real scene, due to material, technology and cost constraints, there is still a big gap between viewing the color image displayed by the three primary colors and viewing the real scene so far. These include that the color is not full enough, the light is not bright enough, and so on. [0003] The color management system represented by the ICC (International Color Consortium International Color Consortium) specification typically uses the gamma (gamma factor) index to adjust the digital quanti...

AI Technical Summary

Problems solved by technology

The color matching function, which is the cornerstone of modern chromaticity, cannot express the complete boundary of the spatial distribution of visible light color visual perception space in CIELAB visual perception uniform space, so that the quantitative description of the visible light spatial characteristics of human visual perception has not been fully completed so far.

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