摘要
以数字水印技术为背景,介绍了基于二值图像Arnold变换置乱和周期性,详细地讨论置乱度,提出了一种图像分块后像素值方差和像素点与4邻域灰度差值相结合的最佳置乱度计算方法。实验结果表明,该最佳置乱度计算方法能很好地反映二值图像的置乱程度并与主观视觉效果相一致。
In the context of digital watermark technology,this paper introduced binary image based Arnold transform and periodicity,and discussed the calculation methods of image scrambling degree in detail so that it elaborated the best formula of image scrambling degree with the combination of pixel value variance as well as pixels and 4 differ of the gray-level.The results show that the calculating method of the best image scrambling degree can well reveal the consistency of binary image scrambling degree and subje...
出处
《计算机应用》
CSCD
北大核心
2009年第2期474-476,483,共4页
journal of Computer Applications
基金
广西青年科学基金资助项目(0832029)
关键词
置乱
ARNOLD变换
置乱度
image scrambling
Arnold transform
image scrambling degree
