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Video retargeting using optimized crop-and-scale

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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 movementof 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.

crop-and-scaledynamic programmingvideo retargeting

XUE Yin-zhu、DU Huan、LIU Zhi、ZHANG Zhao-yang

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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

the Science and Technology Commission of Shanghai MunicipalityInnovation Program for Graduate Students of Shanghai UniversityKey Laboratory for Advanced Displays and System Appliction (Shanghai University),Ministry of Education,China

11ZR1413000SHUCX112125P201004

2011

10.1007/sl1741-011-0746-2

上海大学学报(英文版)
上海大学

上海大学学报(英文版)

影响因子：0.196
ISSN：1007-6417
年,卷(期)：2011.15(4)
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