作　　者： ; ; ; ;

机构地区： 华南理工大学电子与信息学院

出　　处： 《华南理工大学学报（自然科学版）》 2007年第10期152-155,共4页

摘　　要： 提出了一种基于模糊边缘检测的差错掩盖算法,将其作为解码端的工具去恢复视频序列在传输过程中丢失的图像信息.对于一个丢失块,利用模糊边缘检测器得到它与4个领域块交接的边界上的边缘信息,构造一个关于边界匹配差值的能量函数,将最优值对应的运动矢量作为丢失块的运动矢量的估计.仿真结果表明,文中提出的算法无论在主观的视觉还是客观的数值比较上,都能得到质量比现有差错掩盖算法更优良的恢复图像. An error concealment algorithm based on fuzzy edge detection is proposed as a tool at the decoder side to recover the image information lost during the video sequence transmission. For a lost block, a fuzzy edge detector is used to obtain the edge information on the boundary pixels of its four neighboring blocks. With the obtained edge information, an energy function for boundary matching error is constructed. Then, the motion vector corresponding to the minimum of the energy function is used as the estimation of motion vector of the lost block. Simulated results show that, as compared with the existing error concealment algorithms, the proposed algorithm can recover the image with higher quality in both subjective visual evaluation and objective numerical comparison.

关 键 词： 差错掩盖 模糊规则 边缘检测 运动矢量 视频系列

领　　域： [电子电信] [电子电信]