图像置乱程度的研究

Study on the Image Scrambling Extent

对如何客观评价静止灰度图像的置乱度问题,提出了置乱度Ds可用距离置乱因子和灰度置乱因子表示,给出了置乱度的具体计算公式,并计算了几种常用置乱方法的置乱度值。实验表明,所提置乱度参数能较好地描述图像的置乱程度。

The problem on scoring the image scrambling extent objectively for still gray-level images is studied, and the image scrambling extent can be expressed by the DSF （distance scrambling factor） and GSF（gray scrambling factor） is proposed. The evaluating equations for image scrambling degree are given and scrambling degrees of some commonly used scrambling methods are computed. Experimental results show that the proposed image scrambling degree can perfectly describe the image scrambling extent.