Algorithm based on local variance to enhance contrast of fog-degraded image
Yan Zhou · Journal of Computer Applications · 2007
This paper presented an image contrast enhancement method based on local variance that can preserve brightness and gray levels. Because of the characteristic that local variance can show the detail of image, a method of contrast enhancement through local variance comparison to judge enhancement degree was proposed. It can not only enhance the image contrast and hold the details simultaneously, prevent gray levels losing, but also keep the contrast, brightness of the original image and suppress noise. Thus it is especially adapted to the fog-degraded images with scene depth variations.Experimental results show that the proposed algorithm is effective.