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基于几何活动轮廓模型的人脸轮廓提取方法

DOI: 10.11834/jig.200305180

Keywords: 计算机图象处理(520?6040),几何活动轮廓模型,水平集,人脸轮廓提取

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Abstract:

针对在结构性噪声较严重的情况下,常规几何活动轮廓模型无法获得理想分割效果的问题,提出一种基于几何活动轮廓模型的人脸轮廓提取方法,该方法首先将人脸形状的椭圆性约束作为算子嵌入到几何活动轮廓模型中,并利用几何活动轮廓模型提取任意轮廓的优势来快速抽取出图象中类似椭圆的目标边缘;然后根据图象中人脸的先验知识,通过对检测到的椭圆目标进行进一步验证来找出最终人脸轮廓.由于采用变分水平集方法做数值计算,因此该方法不仅能够自然地处理曲线的拓扑变化和能较精确地提取出图象中的人脸轮廓,而且同时可以给出人脸水平旋转的大致角度等信息.实验结果表明,该方法是有效的.

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