With the emergence of HDTV

the application of aspect ratio conversion (ARC) is getting wider in related fields. In this paper

a new aspect ratio conversion algorithm is proposed based on human visual perception. To start with

the fuzzy cluster algorithm based on the modified partition fuzzy degree algorithm is applied to cluster motion vectors adaptively

and then the image motion center of gravity (MCOG) is estimated based on the clustering result. Moreover

to solve the dithering artifact

a splitting region approach based on MCOG and center region of image is developed. Finally

different regions of image are scaled with different ratios. Experimental results illustrate that the proposed method has good consistency with the human visual perception and show its superiority.