东南大学学报（自然科学版）2017，Vol.47Issue(5)：884-891,8.DOI:10.3969/j.issn.1001-0505.2017.05.008
基于分数阶四元数傅里叶变换和遗传算法的彩色图像自适应水印算法
Color image adaptive watermarking algorithm based on fractional quaternion Fourier transform and genetic algorithm
摘要
Abstract
A new color image adaptive watermarking algorithm is proposed based on the fractional quaternion Fourier transform (FrQFT) and the genetic algorithm.First,the image blocks are classi fied into three types according to the masking properties of texture,edge and color tone directly extracted from the color host image.The adaptive watermarking strength value of each block is determined by the corresponding Richard curve.And the parameters of the Richard curves are optimized by the genetic algorithm with the consideration of the invisibility and the robustness.Finally,according to the adaptive watermarking strength values decided by the optimized Richard curves,the watermarks are inserted into the FrQFT coefficients of the color host image by using the quantization index modulation algorithm and the redundant embedding strategy.The experimental results demonstrate that the proposed algorithm outperforms some existing conventional algorithms and some existing quaternion-based algorithms in terms of the invisibility and the robustness.关键词
彩色图像/四元数/自适应水印/分数阶傅里叶变换/遗传算法Key words
color image/quaternion/adaptive watermarking/fractional Fourier transform/genetic algorithm分类
信息技术与安全科学引用本文复制引用
陈北京,周春飞,王金伟,舒华忠..基于分数阶四元数傅里叶变换和遗传算法的彩色图像自适应水印算法[J].东南大学学报（自然科学版）,2017,47(5):884-891,8.基金项目
国家自然科学基金资助项目(61602253)、江苏省自然科学基金资助项目(BK20150925,BK20151530)、江苏高校优势学科建设工程资助项目(PAPD)、江苏高校“青蓝工程”资助项目. （61602253）
