摘要: Quantisation-based watermarking schemes are known to be strongly robust noise and widely applied for image authentication. However, such tend create specific patterns in the histogram of watermarked image, thus opening security gap analysis attack. As such, a secure quantisation-based scheme should preserving. That is say original statistical characteristics preserved image. In this paper, we propose preserving quantisation index modulation (HPQIM)-based watermarking, which can preserve after watermark embedding. This originates from (QIM)-based scheme, but highly increases QIM-based schemes. Meanwhile, proposed HPQIM-based also achieve lower embedding distortion than
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