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使用修改的豪氏道夫距离自动提取运动对象

DOI: 10.11834/jig.200107150

Keywords: MPEG-4,对象跟踪,视频对象平面,豪氏道夫距离,视频编码标准,运动图象,自动提取

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Abstract:

新的视音频编码标准MPEG-4增加了支持基于内容的功能,它把视频序列分割成语义意义上的视频对象(VO)视频对象在某一瞬时的:“快照”称为视频对象平面(VOP),且一系列VOP表示一个运动对象,VOP分割相当困难,这主要是因为物理对象通常不以亮度,彩色或光流等低级特征来表达,所以经典的分割方法无法获得有意义的分割结果,为了对这种视频运动图象进行有效的提取,提出了一种基于修改的豪氏道夫对象踊跃器的自动VOP分割方法,首先提取出初始模型,然后用跟踪器在序列中继帧中跟踪此对象,再对模型逐帧修改,以适应对象在后继帧中形状的旋转和变化,最后根据一系列二值模型来提取出视频对象,此外,为了提高分割效果帮减少复杂性,还使用了静背景滤除技术来滤除静态背景,实验结果表明,该算法是有效的。

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