基于整型小波变换的遥感图像压缩  

Remote Sensing Image Compress by Integer Wavelet Transform

作　　者：尹军[1] 刘德威[1] 

机构地区：[1]中国科学技术大学,北京100075

出　　处：《微电子学与计算机》2002年第9期40-42,共3页Microelectronics & Computer

摘　　要：对给定的遥感图像采用基于“提升”穴Lifing雪算法的整型小波变换,然后对变换后的小波域图像进行编码。在小波域编码时,采用逐次近似量化和LZ77方法编码。当量化门限较高时,则采用EZW方法直接对小波域上的图像进行编码,当门限较低时,则对EZW编码后的残差信息进行LZ77编码。文章用上述方法实现了遥感图像的无损压缩,提高了图像的压缩效果。In this paper,the remote sensin g image data are transformed into wavelet coefficients using integer wavelet tra nsform at first.Then the coefficients are encoded using SAQ(successive Approxi mation quantization)and Lz77algorithm.When threshold is high,the coefficien ts are encoded using EZW algorithm directly鸦when threshold is low,the remnant coefficients are encoded using LZ77algorithm.In this way,the remote sensing image data are compressed successfully and effetely.

关 键 词：整型小波变换 摇感 图像压缩 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]