摘要
在分析宏块时空相关性的基础上,对双十字形运动估计算法进行改进,加入了搜索起点预测策略、自适应的搜索模式和自适应搜索终止准则,设计了一种快速运动估计算法。采用JM86算法对改进前后的算法进行比较,实验结果表明,改进后的算法没有明显降低恢复后的图像质量,但计算速度提高了4倍左右,特别适合于处理能力有限的嵌入式系统使用。
Based on analyzing spatiotemporal correlation macroblock, this paper proposes a fast motion estimation algorithm which can improve dual-cross shape motion estimation algorithm and add initial search point prediction strateg3r, adaptive searching mode and adaptive searching stop criteria. The JM86 algorithm is used to compare algorithms before and after improvement. The experiment results indicate that the improved algorithm not only has little effect on the restored image quality, but also increases the computation speed about 4 times, and it is especially suitable for the embedded system with limited processing capability.
出处
《计算机与网络》
2010年第9期42-44,共3页
Computer & Network
关键词
时空相关性
双十字形
运动估计
起点预测
spatiotemporal correlation
dual-cross shape
motion estimation
initial search point prediction
