基于轴对齐变形的视频缩放技术的研究  

RESEARCH ON VIDEO SCALING TECHNOLOGY BASED ON AXIS-ALIGNED DEFORMATION

作　　者：宁兰芳[1] 黄章进[2] 郭利财[3] 

机构地区：[1]中国科学技术大学计算机科学与技术学院,安徽合肥230027 [2]安徽省计算与通信软件重点实验室,安徽合肥230027 [3]中国科学技术大学中科院沈阳计算所网络与通信联合实验室,安徽合肥230027

出　　处：《计算机应用与软件》2014年第8期213-218,256,共7页Computer Applications and Software

基　　金：核高基重大专项(2009ZX01028-002-003-005);高等学校学科创新引智计划项目(B07033);中央高校基本科研业务费专项资金(WK0110000030)

摘　　要：多样化的显示设备对视频显示的适应性提出越来越高的要求。提出并实现一种基于轴对齐变形的内容感知视频缩放方法。首先根据梯度、人脸和运动的信息对视频进行分析,然后结合相邻帧信息建立二次规划系统进行变形求解。实验表明,求解方法简单有效,对有人脸或运动的视频进行缩放能够得到高质量的结果,能去除抖动现象。求解一帧可在毫秒级时间内完成,同时具有很好的鲁棒性。Diverse display devices put forward increasingly higher demands on the adaptivity of the video display. In this paper we propose and implement a content-aware video scaling method which is based on axis-aligned deformation. First,the method analyses the video according to the information of gradient,faces and motion,then it solves the deformation by establishing quadratic programming system in combination with adjacent frames information. Experiments show that the solution is simple and effective. It can get high quality results on scaling the videos with face or motion,and can remove jitter phenomenon as well. It can deal with one frame within a few milliseconds,and has very good robustness at the same time.

关 键 词：轴对齐变形 内容感知 视频分析 视频缩放 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]