Concerning the deficiency of supervision information in the process of sparse reconstruction in Sparsity Preserving Projection ( SPP), Pairwise Constraint-guided Sparsity Preserving Projection ( PCSPP) was proposed, which introduced supervision information of must-link constraints and cannot-link constraints to guide sparse reconstruction in the process of sparsity reconstruction of training samples, making SPP fuse constraint supervise information efficiently. The experimental results in UMIST, YALE and AR face datasets show, in contrast to unsupervised sparsity preserving projections, our algorithm achieves approximately 5% ~ 15% increase in recognition accuracy hased on the nearest neighbor classifier and promotes efficiently the performance of dimensionality reduction classification.%针对稀疏保持投影的稀疏重构过程中监督信息不足的问题,提出一种成对约束指导的稀疏保持投影算法.该算法在训练样本数据的稀疏重构的过程中,通过引入正约束和负约束监督信息指导稀疏重构,使得稀疏保持投影有效地融合了约束监督信息.在UMIST、YALE和AR人脸库人脸数据集上的实验结果表明,与无监督的稀疏保持投影相比,该方法提高了基于最近近邻分类算法的5％～15％识别准确率,有效地提高了降维分类性能.
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