Comparative study of image compression

In this paper, we present a comparative study of Synthetic Aperture Radar (SAR) image compression techniques which are very much help full for high speed communication. Images have some distinct properties when compared with the natural images. This paper outline the comparison of compression methods such as DCT, SADCT, Tri - DCT, Fractal image compression, JPEG-2000 with encoding and decoding techniques like Set Partition In Hierarchal Tree( SPIHT), set partition embedded block(SPECK), embedded zero tree block coder(EZBC).