混沌序列下图像水印的嵌入算法

混沌序列具有易生成性,对初始条件强敏感性,可完全重现性等特点.故采用混沌序列先做加密处理,然后对图像进行分块处理,利用不同块的亮度及纹理局部特性以及人眼的亮度感觉及对比灵敏度阈值等人类视觉系统特性来确定水印嵌入的强度因子,再分别嵌入水印.实验结果表明,算法对图像压缩、滤波,噪声以及图像裁减具有一定的安全性和鲁棒性.

Embedding Algorithm for Image Watermark with Chaos Sequences

Chaotic sequences have several good properties, including their easy generation, sensitive to initial parameters By using the chaotic sequences to do encryption first, then carrying out segmentation of the image, making use of the brightness of its different pieces and local vein characteristic property, including the brightness feeling and contrast sensitivity threshold value of human eye, the intensity factor for watermark embedding is determined and the watermark is thus embedded respectively. The experi...