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图像置乱度评估的层次分析法

DOI: 10.11834/jig.20140607

Keywords: 图像置乱评估,层次分析法,置乱矩阵,理想均匀分布

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Abstract:

目的针对目前置乱度评估算法对同一图像置乱算法的评价结果存在多变性,对多个置乱算法不能同时评估的问题,提出基于层次分析法的图像置乱评估算法。方法首先,计算置乱矩阵元素分布的均匀性和随机性程度,获得置乱像素位置分布的属性值,保证了同一置乱算法置乱度的恒定性。然后应用层次分析法,实现置乱度2维属性的整合和多个置乱算法的同时评估。结果实验结果表明,该算法得到的置乱度只与置乱算法本身和置乱迭代次数相关,和置乱对象无关,结果具有稳定性和有效性,同时算法可给出任意数目置乱算法的置乱度排序。结论本文算法实现了客观、公平、高效的图像置乱度评估,不仅有利于信息隐藏领域设计者方便快速选择合适的置乱算法,同时也为置乱算法的开发提供了有力的反馈工具。

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