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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 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. 相似文献
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多媒体技术在课堂教学的有效运用,可以优化课堂教学,提升教学实效,培养学生科学素养.多媒体技术在创设学习情境、开展小组合作、增加练习密度等方面,对于提升课堂教学效果,显示出很大的优越性. 相似文献
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多媒体技术在课堂教学的有效运用,可以优化课堂教学,提升教学实效,培养学生科学素养。多媒体技术在创设学习情境、开展小组合作、增加练习密度等方面,对于提升课堂教学效果,显示出很大的优越性。 相似文献
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"意象"是中国传统美学的核心范畴之一,意为"寓意之象",因有创作主体情感活动的参与,使其区别于其他物象而带有某种意蕴与情调.从古代诗歌开始,中国文人便广泛运用审美意象进行创作.苏童作为当代颇具影响力的作家之一,以其小说中大量的意象书写及作品中独特的审美意蕴形成了自己鲜明的创作风格.通过大量审美意象的创构,苏童在完成叙事目的的同时,也将自己的美学追求寓寄于意象之中. 相似文献
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