光学精密工程2012，Vol.20Issue(12)：2768-2772,5.DOI:10.3788/OPE.20122012.2768
基于主成分分析的唇部轮廓建模
Lip contour modeling based on PCA
摘要
Abstract
A modeling method of lip contours was proposed based on Principle Component Analysis (PCA). Firstly, the lip contours of 5 000 training samples were labeled, and the Procrustes analysis was performed on the coordinates gotten by labeling to normalize the data. Then the PCA was used to identify modes in data and compress the data dimension without losing the lip contour information. Furthermore, the lip contour model was constructed by using a mean value and eigenvectors gotten by PCA. Finally, the model constructed by the first 16 modes gotten by PCA was taken to reconstruct the lip contours of the original 5 000 samples. Experimental results indicate that the first 4 modes respectively describe the rotation, lower lip, scale and corners of the lip,and other modes describe more detailed lip variation. The mean difference of every feature point between the lip contour gotten by model reconstruction and the original contour is less than a width of 0. 6 pixels. The model can satisfy the precision requirements of the feature location.关键词
唇部轮廓/特征提取/主成分分析法/建模Key words
lip contour/ feature extraction/ Principe Component Analysis(PCA)/ modelling分类
信息技术与安全科学引用本文复制引用
王丽荣,王建蕾..基于主成分分析的唇部轮廓建模[J].光学精密工程,2012,20(12):2768-2772,5.基金项目
吉林省科技厅自然科学基金资助项目(No.20101518) （No.20101518）
教育部重点项目(No.201049) （No.201049）
