CAJ | 학술논문

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.
제출일충신적기우Logi8tic가밀적로봉성맹검측수자수인산법.이용Logistic영사특성산생적혼돈서렬가밀생성수인서렬;결합인안적시각계통(HVS)대원시도상중적자괴진행선택;재매개피선택적자괴상,근거로봉성요구선택DCT계수;통과대상린계수대적대소진행비교감입수인.실험결과표명,본산법구유로봉성강、안전성고、투명성호、가이맹제취등특점,가유효용우수자매체적판권보호.
A new blind detection digital watermarking algorithm based on Logistic mapping is proposed in this paper,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*8 that have more texture complexity will be chosen..In each chosen subblock some DCT coefficients are selected effectively in accordance with the property of common digital signal processing.Each pair of adjacent DCT coefficients can carry one bit watermarking information.Simulation experiments show that the algorithm improves effectively the robustness and the systems security.