On the basis of the analysis of digital image effect improvement basic theory research, a clearer processing algorithm of university image effect is proposed to make the image more distinct and more quickly presented.By MATLAB software to write relevant simulation code, respectively using the mean filtering method and median filtering method to denoise the image, so as to improve the image clarity, brightness, finally the two methods are compared, in order to better understand the theoretical knowledge. The software running results show that this method can achieve image denoising succinctly and accurately, and has high learning and practical value.

Keywords : Image Denoising; Image Definition; Filtering; MATLAB.