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基于图割的单幅图像影子检测

DOI: 10.3724/SP.J.1004.2014.02306, PP. 2306-2315

Keywords: 户外图像,影子检测,图割,边界信息,区域信息

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Abstract:

?为了准确检测单幅图像中的影子,提出一种基于图割的影子检测方法.首先,使用均值漂移将原始图像分割为若干区域并记录区域之间的边界.其次,利用支持向量机分类器分别获得分割图像中的候选影子边界和候选影子——非影子区域对.然后,利用候选影子边界两侧的区域信息及候选影子——非影子区域对信息构造一个能量函数,该能量函数反映了将图像中一部分区域划分为影子区域而另一部分区域划分为非影子区域时所需的代价.再次,结合该能量函数构造出无向图,并证明所构造的无向图的最小割对应能量函数的最小值.最后,通过图割算法求解该能量函数得到最终的影子检测结果.实验结果表明,与现有代表最新进展的单幅图像影子检测方法相比,所提方法提高了影子检测结果的准确性和连续性.

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