In this paper,we propose a novel adjustable multiple cross-hexagonal search(AMCHS) algorithm for fast block motion estimation. It employs adjustable multiple cross search patterns(AMCSP) in the first step and then use...In this paper,we propose a novel adjustable multiple cross-hexagonal search(AMCHS) algorithm for fast block motion estimation. It employs adjustable multiple cross search patterns(AMCSP) in the first step and then uses half-way-skip and half-way-stop technique to determine whether to employ two hexagonal search patterns(HSPs) subsequently. The AMCSP can be used to find small motion vectors efficiently while the HSPs can be used to find large ones accurately to ensure prediction quality. Simulation results showed that our proposed AMCHS achieves faster search speed,and provides better distortion performance than other popular fast search algorithms,such as CDS and CDHS.展开更多
细胞局部二值模式(cell structured Local Binary Pattern)不能将人体图像的局部信息与全局信息相结合。针对这一不足,在细胞局部二值模式特征的基础上,提出多尺度细胞局部二值模式(Multi-scale cell structured Local Binary Pattern,M...细胞局部二值模式(cell structured Local Binary Pattern)不能将人体图像的局部信息与全局信息相结合。针对这一不足,在细胞局部二值模式特征的基础上,提出多尺度细胞局部二值模式(Multi-scale cell structured Local Binary Pattern,MLBP)特征描述子,联合局部与全局信息,增加检测特征的信息量;另外,在MLBP的基础上进一步提出一个控制因子调节的新算子—可调多尺度细胞局部二值模式(Adjustable Multi-scale cell structured Local Binary Pattern,AMLBP),利用控制因子选择MLBP的最佳表征,提高人体检测的准确率。实验结果表明所提出的两个新特征较前人提出的特征更有效。展开更多
文摘In this paper,we propose a novel adjustable multiple cross-hexagonal search(AMCHS) algorithm for fast block motion estimation. It employs adjustable multiple cross search patterns(AMCSP) in the first step and then uses half-way-skip and half-way-stop technique to determine whether to employ two hexagonal search patterns(HSPs) subsequently. The AMCSP can be used to find small motion vectors efficiently while the HSPs can be used to find large ones accurately to ensure prediction quality. Simulation results showed that our proposed AMCHS achieves faster search speed,and provides better distortion performance than other popular fast search algorithms,such as CDS and CDHS.
