基于图像子块DCT系数对的盲检测数字水印-《郑州大学学报(工学版)》

文章信息/Info

Title:: A Blind Detection Digital Watermarking Algorithm Based on Pairs ofBlocks DCT Coefficients

作者:: 路玲; 孙新德.; 郑州航空工业管理学院计算机科学与应用系,河南,郑州,450015, 郑州航空工业管理学院计算机科学与应用系,河南,郑州,450015

Author(s):: LU Ling; SUN Xinde; Department of Computer Science and Application，Zhengzhou Institute of Aeronautical Industry Management，Zhengzhou450015，China

摘要:: 提出一种新的基于Logi8tic加密的鲁棒性盲检测数字水印算法.利用Logistic映射特性产生的混沌序列加密生成水印序列;结合人眼的视觉系统(HVS)对原始图像中的子块进行选择;在每个被选择的子块上,根据鲁棒性要求选择DCT系数;通过对相邻系数对的大小进行比较嵌入水印.实验结果表明,本算法具有鲁棒性强、安全性高、透明性好、可以盲提取等特点,可有效用于数字媒体的版权保护.

Abstract:: A new blind detection digital watermarking algorithm based on Logistic mapping is proposed in thispaper，which can be more effective for digital media copyright protection．At first watermarking image is encrypted by the chaotic sequence generated by Logistic mapping．According to the human visual system(HVS)some small blocks with size 8宰8 that have more texture complexity will be chosen.In each chosen sub—block some DCT coefficients are selected effectively in accordance with the property of common digital signalprocessing．Each pair of adjacent DCT coefficients can carry one bit watermarking information．Simulation ex—periments show that the algorithm improves effectively the robustness and the systems security．