GPA是一种统计分析方法，可以用来比较物体的形状。这段代码使用GPA进行面部对齐：由Pulak Purkait开发。算法的详细信息可以在https://graphics.stanford.edu/courses/cs164-09-spring/Handouts/paper_shape_spaces_imm403.pdf这篇文章中找到。

GPA is a method of statistical analysis that can be used to compare the shapes of objects. This piece of code employs GPA for face alignment : developed by Pulak Purkait. The details of the algorithms can be found in https://graphics.stanford.edu/courses/cs164-09-spring/Handouts/paper_shape_spaces_imm403.pdf

仿真数据集网站：https://ibug.doc.ic.ac.uk/resources/facial-point-annotations/

参考文献：A Brief Introduction to Statistical Shape Analysis, 2002.3.

完整源码下载地址：

http://page3.dfpan.com/fs/6l2cej8272f1d209163/ 

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