基于新型Arnold反变换的彩色数字图像水印

数字图像置乱及数字图像水印技术中广泛应用了Arnold变换，传统的Arnold反变换迭代周期性长，运算耗费大量的时间和内存，限制了它的发展。该文针对一种改进的新型Arnold反变换给出了它在不同环境下的不同实现算法，新算法减少了迭代计算的运算量。提出了一种新颖的数字水印嵌入和提取技术，把新算法应用于彩色数字图像水印，对水印进行各种攻击性实验以测试其鲁棒性，实验结果达到了预期的目标。

Color Digital Image Watermark Based on New Anti-Arnold Transformation

There are many applications using Arnold transformation in digital image watermark and digital image scramble technology, but because of the long periodicity of traditional anti-Arnold transformation, and large time and memory consumption of computation, the further development is limited. According to a new anti-Arnold transformation, this paper offers different algorithms used in different environment, so the iterative times are quickly reduced, then a new digital image watermark embedded and extract technology is offered, and then is tested the robustness with many attack experiments. The satisfied experimental result meets the demands of robustness requirement of digital image encryption and digital image hiding.