Onboard SPIHT-based and textural-dependent data compression of one-look SAR images

The suggested SPIHT-based (Set Partitioning in Hierarchical Trees) compression method for degraded one-look SAR images is aimed to be realized in onboard radar hardware to improve quality of on-ground registered image. The main idea of the method is to select two segments in the SAR image: with relatively uncorrupted data (after some processing) and data with fully developed speckle. Then, these two sets of points are encoded separately forming two bit streams as outputs of the SPIHT algorithm. The results of modeling have shown the advantage of the textural-dependent data compression in comparing with some famous compression and despeckling procedures under PSNR and SSIM criteria.