【摘要】 本文针对篮球比赛中经常出现的两种渐变镜头——叠化和扫换的特点,提出了一种对突变和渐变同时有效的镜头分割新算法。该算法利用直方图的统计特性,依次求取连续帧差值、累加帧差值及窗口帧差比,并以此确定自适应窗口均值,超均值比率以及多个滑动窗口来进行镜头分割。实验结果表明,本文方法对于突变和渐变镜头均有良好的分割效果。更多还原

【Abstract】 In basketball games,there are two kinds of gradual shots——dissolve shot and wipe shot,whose features are analyzed in this paper.We propose a new method of shot segmentation,which is effective for both abrupt shots and gradual shots.Based on his-togram of every frame,we compute the difference of continuous frame,the difference of cumulate frame,the ratio of the frame difference on window,the adaptive window average,the ratio of surpassing average and sliding windows,which are used for shot segmentation. Experimental result confirms that the proposed method is effective for both the abrupt shot and gradual shot.更多还原