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Face Boundary Extraction

机译:人脸边界提取

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摘要

In this paper, we propose a symmetry-based method for face boundary extraction from a binarized facial image, which contains a number of blobs after thresholding. The salient facial features such as eyes, mouth, and face borders are among the blobs. In our method, the symmetric axis transform is conducted on the exterior contours of the blobs in a binarized facial image by a Constrained Delaunay triangulation. A face shape is decomposed into a few components represented by the chain of three types of Delaunay triangles. The facial features are identified by the symmetry related distance analysis and then the face boundaries are traced with a group of connected Delaunay edges. With this method, face boundary with arbitrary shape can be traced precisely and small broken edges can be linked without obviously distortion.
机译:在本文中,我们提出了一种基于对称性的二值化面部图像的人脸边界提取方法,该方法在阈值化后包含许多斑点。斑点,眼睛,嘴巴和脸部边界等明显的面部特征在其中。在我们的方法中,通过约束Delaunay三角剖分对二值化面部图像中的斑点的外部轮廓进行对称轴变换。脸部形状分解为由三种类型的Delaunay三角形的链表示的几个分量。通过对称相关距离分析来识别面部特征,然后使用一组相连的Delaunay边缘跟踪面部边界。通过这种方法,可以精确地描绘出任意形状的人脸边界,并且可以链接很小的断边而不会出现明显的变形。

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