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Online First:2017-07,
Published:15 July 2017
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Yu-hong CHANG, Hui-fen HUANG, Zhi-hong WANG. Fragile watermarking technique for detecting image[J]. Chinese Journal of Network and Information Security, 2017, 3(7): 47-52.
Yu-hong CHANG, Hui-fen HUANG, Zhi-hong WANG. Fragile watermarking technique for detecting image[J]. Chinese Journal of Network and Information Security, 2017, 3(7): 47-52. DOI: 10.11959/j.issn.2096-109x.2017.00168.
针对图像篡改取证定位问题,提出利用混沌序列和图像QR分解相结合的脆弱水印算法判定图像篡改情况。该算法选取QR分解实现图像分解,图像分解后嵌入水印,同时利用混沌系统对其加密以增强水印的安全性。实验结果发现,所提算法不仅提高了定位型水印算法的安全性,而且还可以估计被篡改区域的篡改强度。
Aiming at the problem of image tampering and forensic localization
a fragile watermarking algorithm based on chaos sequence and image QR decomposition was proposed to determine the image tampering.The algorithm chooses QR decomposition to decompose the image
embeds the watermark after the image is decomposed
and encrypts the watermark by chaotic system to enhance the security of the watermark.Experimental results show that the algorithm not only improves the security of the location watermarking algorithm
but also can estimate the tampering strength of the tampered area.
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