【摘要】 提出了一种基于混沌加密的DCT域数字图像水印算法。该算法利用Logistic映射生成一个随机序列,利用该随机序列对经过置乱处理的二值图像进行调制,最后将其嵌入到原始图像的低频系数中。仿真实验结果表明,实现的水印具有不可见性,而且对于常见的噪声、裁剪、JPEG压缩具有较好的健壮性。更多还原

【Abstract】 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.更多还原