基于差分纹理的人脸表情识别

被引:3
作者
夏海英 [1 ,2 ,3 ]
徐鲁辉 [1 ]
机构
[1] 广西师范大学电子工程学院
[2] 广西师范大学药用资源化学与药物分子工程教育部重点实验室
[3] 桂林电子科技大学广西自动检测技术与仪器重点实验室
关键词
面部表情; Delaunay三角剖分; 差分纹理特征; 主动形状模型;
D O I
暂无
中图分类号
TP391.41 [];
学科分类号
080203 ;
摘要
考虑到自动人脸表情识别背景复杂性问题,提出了一个新的表情识别方法——基于差分纹理的人脸表情识别,该方法在一定程度上能够有效地屏蔽掉个体人脸之间的差异,同时保留住人脸表情信息。首先选定一个标准人脸参考模型,该模型合理分布面部55个基准点,这些基准点主要分布于眼睛、鼻子、嘴和包含表情丰富的外部轮廓上;然后利用Delaunay三角剖分获取这些基准点的相对位置信息。对于人脸表情图像,首先利用主动形状模型(ASM)跟踪定位这55个基准点,然后利用三角剖分获得的相对位置信息,以及应用纹理映射技术将表情图像映射到标准人脸参考模型中,这样中性表情图像(不含表情信息的人脸)和非中性表情(六种基本表情)图像均被映射到同一大小的框架内,最后将它们的差值图像作为表情特征,称为DT(differential texture,差分纹理)特征。最后分别将JAFFE人脸表情库和CK人脸表情库中的部分样本组成混合数据并进行实验,结果表明提出的方法对六种基本表情具有较好的识别率,并且该方法优于传统的Gabor特征和LBP特征方法,并能扩展到动态图像中的表情识别中去。
引用
收藏
页码:3504 / 3507
页数:4
相关论文
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