计算机科学 ›› 2021, Vol. 48 ›› Issue (9): 208-215.doi: 10.11896/jsjkx.200800155
陈长伟1,2, 周晓峰1
CHEN Chang-wei1,2, ZHOU Xiao-feng1
摘要： 针对协同表示分类器(CRC)计算时间复杂度较高的问题,利用重构系数的大小与样本标签之间的正相关性,提出了局部快速协同表示器并用于人脸识别。首先使用最小二乘法求解L2范数约束下的线性回归问题;然后对重构系数进行筛选,舍弃对分类不利的负重构系数;最后抛弃原CRC算法中的样本重构环节,转而使用最大相似性准则确定测试样本所属分类。该方法利用样本的局部相似性,使识别率得到了一定的提升。同时该方法无需样本重构,求解复杂度大幅度降低。在AR和CMU PIE数据集上的实验结果表明,所提方法的时间复杂度极大幅度优于CRC,且在各种光照、表情、角度等状态下其识别率均高于现有其他相关算法。
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