Video retargeting using optimized crop-and-scale |
| |
| Authors: | XUE Yin-zhu DU Huan LIU Zhi ZHANG Zhao-yang |
| |
| Institution: | 1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, P. R. China
2. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, P. R. China ;Key Laboratory of Advanced Display and System Application(Shanghai University), Ministry of Education, Shanghai 200072, P. R. China |
| |
| Abstract: | Mobile devices are increasingly powerful in multimedia transmitting and browsing. However, the small screen and different
aspect ratios of mobile devices lower visual quality while watching images or videos. Video retargeting is aim at fitting
an existing video into arbitrary size and aspect ratio. Previous content-aware retargeting methods are mostly high computational
cost, which limits their applications on the portable devices with low computation ability. In this paper, a new crop-and-scale
approach is presented to adapt video to better suit the target display. We automatically find the optimal parameters of cropping
window using the dynamic programming method, and then scale it to fit the target display. The cropping window can smoothly
shift during a shot to follow the movement of important objects. The retargeting results using our approach introduce no deformation
and jitter effects over the whole video. Experimental results show the success of our approach on adapting a variety of source
videos to small display sizes. |
| |
| Keywords: | crop-and-scale dynamic programming video retargeting |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
|
