Digital image watermark algorithm in DCT domain with chaotic encryption
一种基于混沌加密的DCT域数字图像水印算法

A digital image watermark algorithm in DCT(Discrete Cosine Transform) domain with chaotic encryption was presented.A two-value image that had been dealt with by shuffle was modulated by a random watermark sequence created by using Logistic map,and then it was embedded to the low frequency coefficients of original image.Experimental results demonstrate that the watermark is invisible and robust against common noise,crop and JPEG compress etc.