Layered Near-lossless Compression Scheme of Hyper-spectral Image in Airborne Remote Sensing System
机载遥感系统超光谱图像分层近无损压缩

For real-time compression and transmission of hyper-spectral image in airborne remote sensing system, a new layered near-lossless compression scheme was proposed according to the analysis of correlations among bit planes. An error-prevention DPCM was used in spectral decorrclation of higher bit plane, and then compression ratio control stratcgy was applied based on the complexity of residual image. Lower bit plane was uniformly quantified after quadtree splitting and removing mean. The algorithm is easy to realize and can effectively control the compression ratio. hhe diffcrence between the practical compression ratio and the setting compression ratio is less than 5 0 o. The PSNR is bigger than 33 and the XSD of higher-bit reconstructed image is bigger than 0. 98 when the compression ratio is about 10.