期刊
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
卷 15, 期 10, 页码 1540-1544出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LGRS.2018.2850938
关键词
Lossless coding; predictive coding; spectral decorrelation
类别
资金
- Spanish Ministry of Economy and Competitiveness
- European Regional Development Fund [TIN2015-71126-R]
- Catalan Government [2017SGR-463]
- Universitat Autonoma de Barcelona [UAB-PIF-472/2015]
Spectral redundancy is a key element to be exploited in compression of remote sensing data. Combined with an entropy encoder, it can achieve competitive lossless coding performance. One of the latest techniques to decorrelate the spectral signal is the regression wavelet analysis (RWA). RWA applies a wavelet transform in the spectral domain and estimates the detail coefficients through the approximation coefficients using linear regression. RWA was originally coupled with JPEG 2000. This letter introduces a novel coding approach, where RWA is coupled with the predictor of CCSDS-123.0-B-1 standard and a lightweight contextual arithmetic coder. In addition, we also propose a smart strategy to select the number of RWA decomposition levels that maximize the coding performance. Experimental results indicate that, on average, the obtained coding gains vary between 0.1 and 1.35 bits-per-pixel-per-component compared with the other state-of-the-art coding techniques.
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