【摘要】 为了实现像素位置调换置乱和像素值改变置乱相结合的目的,提出了一个基于位平面的图像置乱方法:先对图像进行位平面分解,然后用随机置乱方法对各位平面图像分别进行位置调换的置乱,最后将经过置乱的各位平面图像重构为一幅置乱后的图像。试验结果表明,与著名的Arnold变换算法相比,该方法效率更高、置乱效果更好,且置乱度相当稳定。更多还原

【Abstract】 To reach the scrambling aim of combination of pixels positions interchange and their values change,a random image scrambling method based on bit planes is proposed.A gray image is divided into several bit planes,which can be shuffled by a random scrambling algorithm.The scrambled image is reconstructed from those shuffled bit plane images.Experiments show that the algorithm is effective and has better efficiency and steady scrambling degree than the Arnold transform.更多还原