期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
期号：ICETET
页码：135
出版社：S&S Publications
摘要：In many practical scenarios, image encryption has to be conducted prior to image compression. This hasled to the problem of how to design a pair of image encryption and compression algorithms such that compressing theencrypted images can still be efficiently performed. In previous paper, compression has been performed by arithmeticcoding, efficiency still unsatisfactory. In proposed method, encryption is operated in prediction error domain usingrandom permutation to achieve high level of security and compression is operated via run length encoding andmodified flood fill algorithm. This algorithm is newly proposed here, which is adopted to find connected pixel in 8directions as well as in circular directions. It is used to predict similar characteristics of pixels and can be able togrouped together as single region, so achieve better compression efficiency. The Experimental results are demonstratedto compare with the state-of-the art method in terms of compression efficiency.
关键词：Encryption; Compression; Random Permutation; Run Length Encoding; Modified Flood fill algorithm
