合成孔径雷达（SAR）图像编码压缩系统

Image Coding Compression System of Synthetic Aperture Radar

论述了合成孔径雷达（ＳＡＲ）图像准实时编码压缩的原理以及在工程上实现的方法。文章依据信息理论，根据ＳＡＲ图像特点，阐述了三种编码压缩的设计方法，并从中选出采用数字信号处理器的硬一软件相结合的最佳编码压缩方案，实践表明，该方法可在８０秒时间内对一幅２０４８×２０４８的ＳＡＲ图像进行编码压缩，压缩比大于１０，系统信噪比大于３５ｄｂ，很好地满足了工程任务需要。

This paper discusses the principles of quasi-real time coding compression of SAR images and the realizing method in the project.According to the information theory and featu res of SAR images, three design methods of coding compression are given. The best one has beenchosen,which uses a digital signal processor,hardwares and softwares,The practice showsthat a 2048 × 2048 SAR image can be coded and compressed within 80 second by thismethod,the compressing ratio is greater than 10,SNR is greater than 35 db meeting the requirements of the project.