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Pàgina inicial > Articles > Articles publicats > Multilevel split regression wavelet analysis for lossless compression of remote sensing data |
Data: | 2018 |
Resum: | 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 coeffi- cients through the approximation coefficients using linear regres- sion. 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. |
Ajuts: | Ministerio de Economía y Competitividad TIN2015-71126-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-463 |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Lossless coding ; Predictive coding ; Spectral decorrelation |
Publicat a: | IEEE geoscience and remote sensing letters, Vol. 15 issue 10 (Oct. 2018) , p. 1540-1544, ISSN 1545-598X |
Postprint 6 p, 344.1 KB |