Abstract: In this paper, a night image enhancement method is proposed for intelligent traffic monitoring to improve visual effect of night image. By improving the adaptive function of the adaptive contrast enhancement (ACE) algorithm in the amplification factor, the algorithm can specifically enhance lowbrightness and lowcontrast areas, to prevent excessive image enhancement, and can enhance the details of images, overcoming the shortcomings of traditional contrast enhancement algorithms. Experimental results show that the algorithm enhancement effects are significant, it is of a fast speed while processing nighttime traffic scene image, good adaptive effect with the capacity of weakening “ringing effects”, color fidelity and better retaining and enhancing the image edges and details.

Key words: image enhancement, night image, contrast, adaptive, traffic scene