A Watermark Preprocessing Algorithm Based on Arnold Transformation and Logistic Chaotic Map
One of the main purpose of the watermark preprocessing is to improve the robustness and security.For this reason, this paper presents an image encryption algorithm, which combines position scrambling and gray scrambling.In order to achieve image location scrambling,first of all,the image is divided to even blocks,and the sub-blocks are scrambled according to Arnold transform.Thsn all of the pixels of each sub-block are scambled by the algorithm based on Logistic chaotic map.Finally, all of the Pixels are redistributed and scrambled totally.Basing on image location scrambling,it takes advantage of multi-dimensional Arnold transformation and Logistic chaotic map, image gray scrambling is achieved.By histogram analysis,key sensitivity anslysis and correlation analysis of adjacent pixels of the results of the simulation, indicating that the scrambling effect of the algorithm is good,and the key space is large.
Arnold transformation Logistic chaotic map Image encryption Histogram analysis Key sensitivity analysis Correlation analysis
Wangsheng Fang Lulu Wu Rong Zhang
Faculty of Information Engineering,Jiangxi University of Science and Technology,Ganzhou,China
国际会议
厦门
英文
720-724
2011-07-08（万方平台首次上网日期，不代表论文的发表时间）