计算机科学 ›› 2021, Vol. 48 ›› Issue (11A): 351-359.doi: 10.11896/jsjkx.210100173
杨章静1,2, 王文博1, 黄璞1, 张凡龙1, 王昕1
YANG Zhang-jing1,2, WANG Wen-bo1, HUANG Pu1, ZHANG Fan-long1, WANG Xin1
摘要： 线性回归分类器(Linear Regression Classifier,LRC)是一种有效的图像分类算法,然而LRC未关注数据的局部结构信息,忽略了类内样本之间的差异性,因此当人脸图像存在表情、光照、角度、遮挡等变化时分类性能不佳。针对此问题,文中提出了一种基于局部加权表示的线性回归分类器(Local WeightedRepresentation based Linear Regression Classifier,LWR-LRC)。LWR-LRC首先以测试样本与所有样本的相似性为度量,构建每类样本的加权代表样本;然后将测试样本分解为加权代表样本的线性组合;最后将测试样本分类到重构系数最大的类别。LWR-LRC考虑了样本的局部结构,构建了每类样本的最优代表样本,使用代表样本进行计算,在提高鲁棒性同时,大幅缩短了计算时间。在AR,CMU PIE,FERET和GT数据集上的实验的结果表明,LWR-LRC与NNC,SRC,LRC,CRC,MRC,LMRC等算法相比,在性能上有很强的优越性。
中图分类号:
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