摘要
在图像块运动估计算法中,自适应抽取图像像素关键点是块匹配成功的关键因素。针对传统自适应抽取像素点算法主要针对局部图像区域的问题,通过利用Hilbert曲线来抽取全局区域的像素点,并把它与十字架搜索模板相结合,提出了一个改进的快速块匹配算法。仿真试验结果表明,该算法简单有效,可以在低比特率视频编码中得到很好的应用。
Adaptive pixel-decimation is a critical technique to the successful estimations of block-motion vectors.Concerning the locality problem in the traditional adaptive pixel-decimation algorithm, a pixel-decimation algorithm is proposed using the Hilbert curve, and it is combined with the adaptive rood pattern search algorithm to get a fast block motion estimation algorithm.The simulation results show that our algorithm is quite effective and robust, and it is easily used in the low-bit-rate video coding application.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第23期5444-5446,共3页
Computer Engineering and Design
