Evaluation algorithm of image position scrambling based on even scrambling

Image scrambling is evaluated from position and pixel value according to the kind of image encryption.Currently,the evaluation effect of pixel value depends on the original image which has limitation.The evaluation effect of position maybe bring huge difference according to different distance which has limitation too.From the scrambling essential,the concept of even scrambling is presented.At the same time,an evaluation algorithm of image position scrambling is put forward based on deviation and evenness.The experiment results show that the algorithm can accurately evaluate the image scrambling degree and keep uniformity with visual,and has feasibility and validity.