计算机应用与软件Issue(10)：185-188,4.DOI:10.3969/j.issn.1000-386x.2013.10.051
基于上下文修正的RO I联合压缩加密算法
ROI JOINT COMPRESSION-ENCRYPTION ALGORITHM BASED ON CONTEXT MODIFICATION
摘要
Abstract
The thesis proposes an ROI image joint compression-encryption algorithm based on context modification.It perfects the zero-tree structure,introduces an adaptive arithmetic encoder,and utilizes a key to modify the original context that is generated by ROI image compression.The modified context is sent into the adaptive arithmetic encoder together with the original decision to realize joint compression and encryption for the ROI image.In order to meet the demands of users with different privileges,encryption is carried out by tree structure scanning approach with regions of interest.In addition the proposed algorithm is simulated.Results show that,when code rate is constant, compared against the original compression algorithm, the proposed algorithm boasts of almost equivalent compression efficiency;when compression ratio keeps constant,compared against Interval Splitting algorithmic encoding,the proposed algorithm boasts of safety performance.关键词
感兴趣区域/自适应算术编码/联合压缩加密/上下文修正/零树结构Key words
Region of interest/Adaptive arithmetic encoding/Joint compression-encryption/Context modification/Zero-tree structure分类
信息技术与安全科学引用本文复制引用
邓小梅,邓家先,邓海涛..基于上下文修正的RO I联合压缩加密算法[J].计算机应用与软件,2013,(10):185-188,4.基金项目
海南省自然科学基金项目(613155).邓小梅,硕士生,主研领域数字图像处理. （613155）
