Low illumination color image enhancement method based on improved Retinex

The present invention relates to the field of computer vision and particularly relates to a low illumination color image enhancement method based on improved Retinex. Firstly, a low illumination color image is converted into an HSV color space from an RGB color space; then a hue H component and a saturation component H are maintained to be unchanged, the edge maintained unchanged MSR (Multi-Scale Retinex) enhancement algorithm is carried out on a tone component V; the image is converted into the RGB color space from the HSV color space, and finally the color restoration of an image is carried out through a color restoration function, and an enhanced color image is obtained. According to the algorithm, through the MSR algorithm, the tone component is enhanced, edge information is highlighted, finally an optimized color restoration function is used to carry out image color restoration, the color distortion is overcome, the brightness of the color image is improved in the whole, and a good visual effect is achieved.