【摘要】 提出一种工作在MPEG压缩域的检测算法。首先从压缩视频中提取DC图像和重构参考帧,然后经过全局运动补偿之后进行基于边对象变化率的镜头分割点检测,最后结合DC图直方图差法构成联合检测算法。本算法能准确地检测到镜头渐变,镜头切变,能得到渐变类型等特性。用AdobePremiere5.1生成的各类镜头转换视频片段进行检测,实验结果验证了算法的有效性。更多还原

【Abstract】 Many video segmentation algorithms can detect cuts efficiently, but detection of gradual transition is still a problem. In this paper, a new transition detection method in MPEG compressed domain is presented. First, the algorithm constructs edge objects from the DC reference image, then, after globe motion compensation the shot boundaries are detected. Finally, a two-pass processing is carried out. Then experiments show that this is a robust and fast algorithm.更多还原