基于整数小波变换的准无失真图像压缩技术

Quasi-Lossless Image Compression Based on Integer Wavelet Transforms

本文首先讨论了一般整数小波的构造方法，然后利用分块DPCM（Differential Pulse Code Modulation）与整数小波变换进行遥感图像的准无失真压缩。该方法可进行实时处理，硬件实现简单，可并行处理。实验结果表明，该方法是一种有效的遥感图像压缩方法。

In this paper, firstly we discuss a constructing method of general integer wavelet transform. Secondly, using subblock DPCM and integer wavelet transforms, we have obtained the encoding compressive methods of the quasi-lossless image compression for remote sensing images. This method is of the following features： （1） The real-time processing of remote sensing images is possible for real-time transmission; （2） Hardware implement is easy; （3） The algorithm is of parallel structure; （4） Only addition, subtraction and bit-shift are necessary. Experimental results illustrate that our method is an effective compressive encoding method for remote sensing images.