中国空间科学技术

中国空间科学技术

• • 上一篇    

基于提升的Landsat-TM光谱图像压缩

卓红艳,罗建书,魏文俭   

  1. 国防科学技术大学,国防科学技术大学,国防科学技术大学 长沙410073 ,长沙410073 ,长沙410073
  • 发布日期:2005-08-25

An Landsat-TM Image Compression Algorithm Based on Lifting

Zhuo Hongyan Luo Jianshu Wei Wenjian (National University of Defence Technology, Changsha 410073)   

  • Online:2005-08-25

被引次数

7

摘要： 在分析多光谱图像小波变换后系数特点的基础上,提出了一种基于整数小波变换的三维集合分裂嵌入块编码(3DSPECK)压缩方法。该方法将小波变换压缩技术中的零数编码推广到多光谱图像压缩中,采用整数小波变换去除空间冗余,谱域上对多幅小波图像构成的小波矢量采用离散余弦变换进行变换,对变换后的系数进行3DSPECK编码。实验结果表明,该方法硬件实现简单,编码解码时间快,对内存要求低。

关键词: 小波变换, 图像编码, 遥感图像处理

Abstract: Based on analyzing the coefficient characteristic of inter wavelet transformed, the 3D SPECK compression of multispectral image is put forward. In the method the zero-tree coding of compression of wavelet transform is extended to the compression of multispectral image. Integer wavelet transform is applied to reduce spatial decorrelation, and DCT is applied to reduce the inter-band correlation. 3D SPECK is used in processing transformed wavelet coefficient. The results of experiment indicate that hardware is easier to realize, the time of coding and decoding is less, and the requirement of EMS memory is fewer.