关键词: Logistic混沌序列, Chebychev混沌序列, Arnold变换, DCT变换, 彩色水印

Abstract:

A kind of  complex encrypting adaptive color blind watermarking algorithm was proposed based on timedomain and frequencydomain(integer wavelets domaion).  Pixel value was displaced by logistic chaotic mapping and Chebychev chaotic mapping to creat the  complex chaotic sequence. Pixel position was scrambled by Arnold transform. The watermarking embedding intensity factor was counted by the DCT coefficient. A color watermarking embedding and blind extracting algorithm was designed. Algorithm experiments were produced by Matlab7. Experimental results showed that the algorithm had good transparency and strong robustness on the common watermarking attack.

Key words: logistic chaotic sequence, Chebychev chaotic sequence, Arnold transform, DCT transform, color watermarking