Abstract: Image enhancement provides good dynamic range compression in each red，green and blue（RGB） channel of real-color image，but it fails in color rendition.This paper proposes to transform a real-color image from RGB space to HSV space at first. Then based on illumination-reflectance model，value is enhanced by homomorphic decomposition and wavelet transform.At last，the color purity of saturation is adjusted based on spectral sensitivity of human visual system.Experiments show the compression of real-color image dynamic range is obviously effective，it is successful in color rendition and the real color images enhanced have adapted well to human vision.Real color image enhanced by the algorithm of this paper is better than the multi-scale Retinex’s with color restoration.