The Impact of scrambling algorithms on peak signal noise ratio in watermarking image


Digital image scrambling can not only be a usual image encryption, but also a pre-progress of digital watermark and image hiding. Image scrambling technologies have been widely used in digital watermarking technology, and the watermarking information will be directly embedded into the image after scrambling transformation, which can accomplish image information hiding. In this paper, study the influence of scrambling image by using three algorithms that scramble image watermark on peak signal noise ratio (PSNR) for watermarking image. This work is used Arnold algorithm, affine transformation and magic square on engineering faculty logo as watermark images buy using MATLAB. The experimental results show all scrambling algorithms which used don't influence on the image transparency and the less algorithm impact on PSNR is Arnold algorithm