基于QPCA的彩色图像复制粘贴检测

doi:10.3969/j.issn.0255-8297.2019.02.014

Abstract

Abstract: Currently, in order to deal with color images, most forensics methods transform color images into gray images,which results in the color property not being fully used. Aimed at this problem, a copy-move forgery detection scheme based on quaternion principal component analysis (QPCA) is proposed in this paper. The scheme makes full use of the color property and the relationship among all color channels, which improves the accuracy in forged area effectively. The proposed scheme is block-based and frstly it divides images into overlapping blocks and performs QPCA of all the blocks to extract features. Then the features are lexicographical ordered to obtain shift vector and its frequency. Finally we compare the shift vector frequency to the threshold to locate the forged region. Experiments show that the missing-false alarm rate in the proposed method is lower than the existing methods and has a better accuracy.

Key words: color image, block-based, quaternion principal component analysis (QPCA), copy-move forgery detection

CLC Number:

P751.1

WANG Jin-wei, XU Chun-hui. Copy-Move Forgery Detection for Color Images Based on QPCA[J]. Journal of Applied Sciences, 2019, 37(2): 291-300.

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Copy-Move Forgery Detection for Color Images Based on QPCA

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