2-Dimension Non Equilateral Image Scrambling Transformation
Xingchen Heng · Dianzi xuebao · 2007
The classic 2-dimension image scrambling is used in the equilateral image,but for the non equilateral image,it has to be expanded into equilateral image or scrambled by the high-dimension scrambling transformation matrix.To solve the problem,in this paper,a novel 2-dimension non equilateral image scrambling transformation is proposed and the periodicity existence judgment criteria are presented.Furthermore,the proper scrambling matrix coefficients are selected by the judgment criteria so that the expanded 2-dimension scrambling transformation can be used to scramble non equilateral image without extra space and cost and the recoverable periodicity exists.The experiments show the validity and feasibility of proposed scrambling transformation.