Research of Hyper-spectral Image Lossless Compressing Technology Based on DPCM Between Spectra and IWT
基于谱间DPCM和整数小波变换的超光谱图像无损压缩

The spectral correlation and spatial correlation of images from interferential imaging spectrometer is analyzed and calculated.The mixed lossless compression scheme is proposed.This scheme includes three aspects:DPCM between Spectra,Integer Wavelet Transform to prediction error image and adaptive bit-level Arithmetic Coding to Wavelet coefficient.The experimental data shows that the algorithm has carried out lossless compression,the average of compression ratio is up to 2.018.It is increase 40.3% in comparison with Integer Wavelet Transform of two dimensions.This algorithm use addition-subtration and shifts to complete data compression.Implementation with hardware is easier.