Wavelet-based hyperspectral image coding using robust fixed-rate trellis-coded quantization
Glen P. Abousleman · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1998
A system is presented for compression of hyperspectral imagery. Specifically, DPCM is used for spectral decorrelation, while a robust 2-D discrete wavelet coding scheme is used for spatial decorrelation. Trellis-coded quantization is used to encode the wavelet coefficients. Side information and rate allocation strategies are discussed. Fixed-rate codebooks are designed using a modified version of the generalized Lloyd algorithm. This system achieves a compression ratio of greater than 70:1, with an average PSNR of the coded hyperspectral sequence exceeding 40 dB.