Compressed domain temporal segmentation of video sequences
    1.
    发明申请
    Compressed domain temporal segmentation of video sequences 审中-公开
    视频序列的压缩域时域分割

    公开(公告)号:US20060109902A1

    公开(公告)日:2006-05-25

    申请号:US10993919

    申请日:2004-11-19

    CPC分类号: H04N19/48 H04N5/147 H04N19/87

    摘要: A method for detecting scene changes in a video sequence in the compressed domain. DC images are extracted from the macroblocks of the video frames. Histogram differences and pixel difference of the DC images are used for scene cut detection, and the changes in the histogram differences are used for gradual scene change detection. Thus, scene cut detection is based on first order derivatives of the histogram and gradual scene change detection is based on second order derivatives of the histogram. If the macroblocks are intra-coded, they are used to compute the exact DC images. If the macroblocks are not intra-coded, motion information in the frame is partially used for scene change detection.

    摘要翻译: 一种用于检测压缩域中的视频序列中的场景变化的方法。 从图像帧的宏块中提取DC图像。 DC图像的直方图差异和像素差异用于场景切割检测,直方图差异的变化用于逐渐的场景变化检测。 因此,场景切割检测基于直方图的一阶导数,并且逐渐的场景变化检测基于直方图的二阶导数。 如果宏块被帧内编码,则它们被用于计算精确的DC图像。 如果宏块不进行帧内编码,则帧中的运动信息被部分地用于场景变化检测。