彩色直方图镜头分割中的阈值研究

Research on Threshold of Shot Segmentation based on Color Histogram

针对基于全局彩色直方图的镜头分割算法,研究其中五个参数:阈值、颜色空间子区间分割个数M、平均帧差、查全率和查准率之间的关系,设计了相应的计算方法,并在实验的基础上的对阈值与查全率和查准率的关系作了定性分析,揭示了5个参数之间的内在规律,对阈值和查全率的函数关系作了二次拟合,给出了一种满足查全率和查准率要求的阈值确定方法。

The shot boundary detection technology and relevant algorithm are introduced briefly in the paper. For the shot detection algorithm based on color histogram, many experiments have done on five ＇parameters in it-threshold, the color subspace segmentation numbers, average frame differences, recall and precision, then the relation between recall and precision have been analyzed; quadratic fitting is performed on function between threshold and recall; researching on relations among the histogram subspace numbers, threshold, recall and precision has been done.