基于混沌系统的脆弱性水印算法设计

Fragile watermarking algorithm based on chaos system

提出了一种新的脆弱性数字水印方案,原始图像不重叠分块后求取各块的灰度平均值,然后利用混沌系统首先对其进行混沌映射,再对其用二值映射函数映射为二值序列后作为水印信息嵌入到载体图像的LSB位平面中.实验结果表明,论文提出的方案有很好的篡改定位能力和安全性.

A scheme of fragile digital watermarking was proposed, where the original image was divided first into segments without overlaps, then the mean value of gray level of all segments was calculated, respectively, further they were chaotically mapped with chaos system, and finally they were transformed into hi-value array with hi-value mapping function as watermarking messages to be embedded into the LSB bitplane of bearing images. The result of experiments showed that the scheme presented possessed an excellent ability of image location with juggling actions and high security as well.