计算机应用与软件2017，Vol.34Issue(8)：206-212,7.DOI:10.3969/j.issn.1000-386x.2017.08.037
基于DWT域对数量化索引调制的数字水印算法
LOGARITHMIC QUANTIZATION INDEX MODULATION DIGITAL WATERMARKING ALGORITHM BASED ON DWT DOMAIN
摘要
Abstract
To increase the invisibility and robustness, a digital watermarking algorithm based on DWT domain is combined with μ-law technology and logarithmic quantization index modulation.The algorithm has solved the problem of not being applicable to non-uniform signal for QIM uniform quantization.The original image is conducted with discrete wavelet transform.Then the μ-law function is applied to the approximate part coefficients of the original image.The transformed signal is quantized to embed binary watermark data by using QIM.The watermark embedding position, quantization step and parameters are discussed to obtain optimum values in this paper.Experimental results show that this algorithm improves invisibility of the watermark.Moreover, the proposed scheme has strong robustness against common attacks, such as Gaussian noise, median filtering, JPEG compression.关键词
离散小波变换/μ律函数/对数量化/量化索引调制/数字水印Key words
Discrete wavelet transforms/μ-law function/Logarithmic quantization/Quantization index modulation/Digital watermarking分类
信息技术与安全科学引用本文复制引用
汤永利,张亚萍,叶青,闫玺玺,高玉龙..基于DWT域对数量化索引调制的数字水印算法[J].计算机应用与软件,2017,34(8):206-212,7.基金项目
国家自然科学基金项目(61300216) （61300216）
河南省科技厅项目(152102410048,142300410147) （152102410048,142300410147）
河南省教育厅项目(12A520021,16A520013) （12A520021,16A520013）
河南理工大学博士基金项目(B2013-043,B2014-044). （B2013-043,B2014-044）
