In view of such problems as the limited coloration effectiveness and the illumination distribute inharmonious for the traditional enhancement algorithm

a novel Retinex algorithm of image enhancement based on Zernike moment is proposed in this paper.By the Zernike moment of the V and S components of the image

the background gray level and step height in HSV space will be calculated. These results can be used to adjust the difference of gray level in intersection pixel and improve the correlation of regional saturation

and further to enhance the illumination and restore the image coloration. Experimental results show that the algorithm can both restore the image illumination

coloration effectively and adapt to various images of different characteristics.