介绍了一种可以在压缩域和非压缩域实时检测视频切变的算法。算法采用了大小双重窗口，利用大窗口全局阈值提取候选切变位置，再在以候选切变位置为中心的小窗口中结合双侧和单侧判断进一步检测真实切变位置。算法能有效地避免因摄像机和目标的剧烈运动造成造成误检和漏检的情况，在检测五段视频的实验中，取得100％的查全率和96％的准确率。

A real time algorithm is proposed for the detection of abrupt scene change in uncompressed as well as compressed video. The proposed algorithm is based on the dual (one big and one small) sliding windows. The big window is used for selecting the probable positions of abrupt scene change, and the small window whose center is at the probable position selected is used for determining the real positions of abrupt scene change. The decision made in the small window is helped by a combination of double side checking and a single side checking. This algorithm can effectively avoid the false detection and miss detection caused by the violent motion of camera and/or large objects. The effectiveness of our algorithm has been demonstrated using five video clips (about 9000 frames, 98 abrupt scene changes), the recall rate is 100% and the precision rate is 96%.