Aiming at overcoming the limitations of under enhancement,over enhancement and low contrast in the existing image enhancement methods,a low light image enhancement method based on guided filter and pixel redistribution is proposed.This method estimates the illumination part of image with guided filter,taking full advantage of the edge preservation capability of the guided filter;the pixels of the illumination image are subjected to relatively uniformly redistribution, so as to comprehensively improve the brightness and contrast of illumination image.The final enhanced image is obtained by performing inverse Retinex transformation on the illumination image enhanced by pixel redistribution and the refleced image.The experimental results confirm that compared with existing enhancement methods,the proposed method achieves better enhanced effect,the contrast and textural structures of enhanced image are clearer.