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基于PCA的哈希图像检索算法

Yijuan Su, Hao Yu,Cong Lei, Wei Zheng,Yonggang Li

Application Research of Computers(2018)

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Abstract
为了解决传统图像检索算法低效和耗时的缺点,提出一种基于PCA哈希的图像检索算法.通过结合PCA与流形学习将原始高维数据降维;然后通过最小方差旋转得到哈希函数和二值化阈值,进而将原始数据矩阵转换为哈希编码矩阵;最后通过计算样本间汉明距离得到样本相似性.在三个公开数据集上的实验结果表明,提出的哈希算法在多个评价指标下均优于现有算法.
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