Image irradiation correcting system based on color domain mapping

Abstract

The present invention discloses an image illumination correcting system based on color gamut mapping. The brightness signal of input image and R, G, B signals after color space decomposition are separated and processed. Then, the brightness value of brightness signal obtained by brightness adjustment is multiplied by the R separation color signal, G separation color signal and B separation color signal after color space decomposition for recovering and obtaining image after illumination correction. The novel color space decomposition and brightness adjusting can better retain the color of original image while the picture contrast is increased and the noise of image is not increased. Simultaneously, the illumination correcting system adopted by the invention strengthens the dark-light partand suppresses the high-light part in a brightness adjusting calculating module. The image containing high-light and dark-light can be processed.

Description

An Image Illumination Correction System Based on Color Gamut Mapping technical field The present invention relates to the technical field of image processing, in particular to an image illumination correction system based on color gamut mapping that processes image color correction and enhancement under bright and dark scene illumination. Background technique Many image and video acquisition devices, such as digital cameras, video cameras, etc., when collecting image signals, because the image is formed by the reflection of light, there is often a phenomenon that the light source is not evenly illuminated on the scene, so that the part with strong light Brighter, the part with weak light is darker, resulting in uneven lighting of the environment, or the light is darker, or the light is brighter. In order to avoid this phenomenon of darker or brighter light, it can be compensated by adjusting the exposure time. However, the existing image signal acquisition equipment can ...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the deficiencies of the existing image illumination correction methods, and provide an image illumination correction based on color gamut mapping that can well maintain the original image color without increasing image noise, and can process images containing high light and dark light system

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