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| 基于改进SPECK的雷达图像无损压缩算法 | |
| 引用本文： | 李天伟,贾传荧,张子剑,刘哲中.基于改进SPECK的雷达图像无损压缩算法[J].中国惯性技术学报,2006,14(6):41-44. |
| 作者姓名： | 李天伟 贾传荧 张子剑 刘哲中 |
| 作者单位： | 1. 大连海事大学,大连,116026;海军大连舰艇学院,大连,116018 2. 大连海事大学,大连,116026 3. 天津大学,管理学院,天津,300072 4. 天津航海仪器研究所,天津,300131 |
| 摘 要： | 针对VDR雷达图像的无损压缩技术要求高速、高效、低内存占用量的特点,在分析图像整数小波变换的基础上,研究一种基于整数小波和改进SPECK快速无损压缩算法.该算法利用整数小波对图像进行变换,进而采用SPECK进行编码.SPECK算法采用易于计算和并行处理的块结构,不仅提高了编码速度,还具有动态存储小、容错性好等特点.算法中还引入了哈希表和综合匹配法对SPECK算法进行了改进.通过对VDR雷达图像的无损压缩实验证明,该算法不仅提高了压缩速度,而且提高了压缩比,具有广泛的应用价值. |
| 关 键 词： | 整数小波变换 SPECK 无损压缩 匹配 |
| 文章编号： | 1005-6734(2006)06-0041-04 |
| 修稿时间： | 2006年9月11日 |
Lossless compression algorithm for radar image based on improved SPECK |
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| LI Tian-wei,JIA Chuan-ying,ZHANG Zi-jian,LIU Zhe-zhong.Lossless compression algorithm for radar image based on improved SPECK[J].Journal of Chinese Inertial Technology,2006,14(6):41-44. | |
| Authors: | LI Tian-wei JIA Chuan-ying ZHANG Zi-jian LIU Zhe-zhong |
| Abstract: | Since the lossless compression algorithm of VDR(Voyage Data Recorder) radar required high speed,high efficiency and less memory,an algorithm was presented which combined the integer wavelet transform with improved SPECK(Set Partitioned Embedded Block).First,the image was transformed by integer wavelet,and then it was coded by SPECK.By using block structure which is easy for parallel computing,the SPECK would speeds up coding and occupies minimum dynamic memory and be good at fault tolerance.Synthetic match and Hash table were introduced to improve SPECK.The simulation result of VDR radar image compression illustrates that the improved SPECK has higher compression speed and compression ratio,and its application is wide. |
| Keywords: | SPECK |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |