关键词: 图像压缩，图像分层编码，超光谱图像，压缩比调节，四叉树划分

Abstract: 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.

Key words: Image compression, Layered image coding, Hyper-spectral image, Compression ratio control, Quadtree sphting