Color image contrast information calculation method and device

Abstract

The invention discloses a color image contrast information calculation method and device, and belongs to the technical field of computer vision, and the method comprises the steps: calculating the chromaticity information of each pixel point in an image in an HSV color space; calculating brightness information of each pixel point in the image in an RGB color space based on the linear decoloration proportion parameter; calculating color difference information between adjacent pixel points according to the chromaticity information and the brightness information of each pixel point; and taking the pixel points of which the color difference information exceeds a threshold value as difference points, and calculating the contrast of the image based on the color difference information corresponding to the difference points and the number of the difference points. According to the method, the influence of an area with uniform color or nearly uniform color in the original image is small, the color contrast information can be better reserved in the brightness information acquisition process, the influence of adjacent data information with the difference which cannot be visually perceived on the final result is reduced, and the perceptual contrast information of the color image is more favorably expressed.

Description

technical field [0001] The invention relates to the technical field of computer vision, in particular to a color image contrast information calculation method and device. Background technique [0002] In recent years, image processing technology has been widely used in high-tech fields such as aerospace, medical bioengineering, robot vision, and military security, and has become a research hotspot. Researchers have proposed various image processing methods based on different principles and applications. In practical applications, different principles and processing procedures will affect the imaging quality of the resulting image, and the quality of the image directly affects the acquisition of information and subjective experience. Therefore, image quality assessment is a very important research topic in the field of image processing. Among the commonly used image quality assessment values, contrast is one of the most relevant features of visible image visual signals, which...

AI Technical Summary

Problems solved by technology

[0005] However, most of the existing contrast calculation methods do not consider the perceptual color difference information brought about by the visual characteristics of the human eye, and cannot effectively reflect the relationship between the contrast between images.

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