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    • 60. 发明授权
    • Method and apparatus for detecting abrupt and gradual scene changes in
image sequences
    • 用于检测图像序列中的突然和逐渐的场景变化的方法和装置
    • US6055025A
    • 2000-04-25
    • US171136
    • 1993-12-21
    • Behzad Shahraray
    • Behzad Shahraray
    • H04N5/262G06T7/20G11B27/031G11B27/28H04N5/14H04N7/26H04N7/18
    • G11B27/031G06T7/202G11B27/28H04N19/142H04N19/179H04N19/80H04N19/87H04N5/144H04N5/147G06T2207/10016G11B2220/65
    • A method is capable of detecting both abrupt and gradual scene changes. Consecutive frames of an image sequence (e.g., a video program) are first acquired and digitized. The images are subdivided into a plurality of rectangular regions. Block matching is performed between the current frame and the Dth previous frame to determine match signals that represent the likelihood that the regions of the first frame contain visual information substantially similar to respective matching regions of the second frame. The match signals are ordered beginning with the match signals defining the best match and ending with the match signals defining the worst match. The first S match signals are selected and averaged together, to obtain an instantaneous match (IM) signal S is user definable and is greater than zero and less than or equal to the number of regions into which each frame is divided. The IM signal provides a criteria for determining whether the first frame belongs to a scene different from the second frame. Finally, a scene change is indicated when the IM signal meets certain decision criteria.
    • 一种方法能够检测突发和逐渐的场景变化。 首先获取并数字化图像序列的连续帧(例如,视频节目)。 图像被细分为多个矩形区域。 在当前帧和Dth前一帧之间执行块匹配,以确定表示第一帧的区域包含基本上类似于第二帧的相应匹配区域的视觉信息的可能性的匹配信号。 匹配信号从定义最佳匹配的匹配信号开始排序,并以定义最差匹配的匹配信号结束。 第一S匹配信号被选择并平均在一起,以获得瞬时匹配(IM)信号S是用户可定义的并且大于零并且小于或等于每个帧被划分到的区域的数量。 IM信号提供用于确定第一帧是否属于与第二帧不同的场景的标准。 最后,当IM信号满足某些决策标准时,会指示场景变化。