基于QR分解的NSCT域指纹图像脆弱水印算法

doi:10.3969/j.issn.0255-8297.2017.06.007

Abstract

Abstract:

To ensure security of fingerprint information in a network environment, a fragile watermarking algorithm for fingerprint images based on QR decomposition in the nonsubsampled contourlet transform (NSCT) domain is proposed. The fingerprint watermark is prepared by double encryption using Arnold transform and logistic scrambling. Twolevel NSCT is performed on a host image, and the low frequency component is divided into blocks with QR decomposition. The encrypted fingerprint watermark is embedded into the upper triangular matrix obtained with QR decomposition. The algorithm has good fidelity of the information because entries in the first row of the upper triangular matrix contain most information in the image. Experimental results show that, keeping invisibility, the proposed algorithm is vulnerable to both conventional image processing and geometric attacks, and therefore can accurately locate the tampered area.

Key words: fragile watermarking, fingerprint image, non-subsampled contourlet transform (NSCT), tamper localization, QR decomposition

CLC Number:

SHI Jun-peng, WU Yi-quan. Fragile Watermarking for Fingerprint Images Based on QR Decomposition in NSCT-Domain[J]. Journal of Applied Sciences, 2017, 35(6): 735-744.

References

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Fragile Watermarking for Fingerprint Images Based on QR Decomposition in NSCT-Domain

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