关键词: 超光谱图像, 双向波段预测, 误差补偿, 预测树模型

Abstract:

To improve the real-time performance of the current compression algorithms on hyperspectral image, a new lossless compression method based on prediction tree with error variances compensated for hyperspectral image is proposed. The method incorporates prediction tree and adaptive interband prediction techniques.The bidirectional interband prediction to current band is applied to hyperspectral image compression. The error created by prediction tree is compensated by linear adaptive predictor which de-correlates spectral statistic redundancy. In consideration of the complexity for the coefficients calculation, a correlation-driven adaptive estimator is designed with which parameters are uniquely determined by the previously coded pixels. After de-correlating intraband and interband redundancy, an efficient wavelet coding method, SPIHT (Set Partitioning in Hierarchical Trees), is used to encode residual image. The experiments show that the proposed method achieves both low overhead and high compression ratio in comparison with the popular lossless compression algorithm.

Key words: hyperspectral image, bidirectional interband prediction, error compensated, prediction tree model