关键词: 镜头边界检测 帧分块 小波变换 似然比 综合相似度

Abstract:

An important step in content-based video retrieval is the temporal segmentation of video. There are some basic algorithms , including the histogram algorithm,the double-thresholding method,which are used to detect abrupt shot changes and gradual shot changes, but they cannot always attain high-precision detection. We propose a twi-difference algorithm for shot boundary detection based on the similarity that integrates the wavelet analysis and statist ics of frames. And the algorithm is used to detect the abrupt shot changes and gradual shot changes based on the adjacent frames and the non-adjacent fr ames. It is proved that the twi-difference algorithm obviously improves the detecting precision.

Key words: shot boundary detection, frame blocking, wavelet change, ratio rate. integrated similarity