一种改进的嵌入式小波图像编码算法  

An Improved Embedded Image Coding Algorithm Based on Wavelet Transform

作　　者：陈思佳[1] 

机构地区：[1]山东工商学院,烟台264005

出　　处：《现代计算机（中旬刊）》2013年第8期20-24,共5页Modern Computer

基　　金：2011年度山东工商学院青年科研基金项目(No.2011QN130)

摘　　要：通过深入分析嵌入式集合分裂块(SPECK)算法的优点与缺点,针对其优缺点对其进行改进,提出了一种低内存开销的编码算法:无链表SPECK算法。该算法通过取消原来算法中的链表结构减少内存耗费,提高算法的编码速度,从而使得该算法更易于软、硬件的实现;同时,该算法将重要系数的位信息伴随着符号信息、排序信息同时输出,使得比特分配更加合理,提高编码算法的压缩性能。实验结果验证该算法的有效性。Through the analysis of the Set Partitioned Embedded Block Coder（SPECK） algorithm, proposes a low memory overhead algorithm： listless SPECK algorithm, which against the disadvantages of the original algorithm. The algorithm reduces the memory consumption and increases the coding speed by canceling the lists of the original algorithm, this measure makes the algorithm more suitable for a fast, simple software or hardware implementation. Moreover, the algorithm output the positions of the important coefficients with the symbol and sorting information at the same time, which makes the bit allocation more reasonable and improves the compression performanee. The experimental results verify the effectiveness of the algorithm.

关 键 词：图像编码 小波变换 嵌入式小波编码 SPECK算法 线性索引 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]