武打片中的动作场景检测方法

本文提出了一种简单有效的方法检测武打片中的动作场景:首先根据动作场景的节奏特点,从影片层次出发,使用镜头长度和MPEG-7运动活力描述符定义了镜头的步调函数来度量节奏,由此定位快节奏区域,找到动作场景的大体位置;之后根据动作场景的内容发展特点,从镜头层次出发,分析快节奏区域及周边的镜头的内容,根据视觉特征确定动作场景的边界点.两个层次(影片和镜头)信息的充分利用使得方法简单易操作,基于压缩视频的处理方法提高了运算速度,实验结果表明了该检测方法的有效性.

An Approach to Action Scene Detection in Martial Arts Movies

This paper presents a simple and efficient approach to action scene detection in martial arts movies. Quick tempo is an important movie-level character for action scene. A shot pace function defined by shot length and MPEG-7 motion activity is used to measure the tempo. From the shot pace change curve, it is easy to locate the rough position of action scene. According to the character of action scene development, action scene boundary is detected at the shot level by analyzing the visual contents of shots within and around the above rough region. Two clues from the movie-level and shot-level make the method simple;working on compressed video directly makes the method very fast. Experimental resuits based on real-world movies verify its efficiency.