Aspect Ratio Conversion Based on Saliency Model

The Aspect ratio is the fractional relation of the width of a video image compared to its height. The paper is focused on solving the problem that how to play various kinds of videos on the device screen with different aspect ratio from them. It is the first time to introduce saliency model, which can take human attention into account, into the aspect ratio conversion. Based on the saliency model, we proposed a novel cropping mode and a novel un-unique expanding mode, and then combine the two modes according to some principles from media aesthetics. Experiment results show that there is no distortion in the region of interest and no loss will be noticed in the output video sequences, which demonstrates the effectiveness and efficiency of our approach.