Polarmetric SAR data compression using wavelet packets in a block coding scheme

TitlePolarmetric SAR data compression using wavelet packets in a block coding scheme
Publication TypeConference Paper
Year of Publication2002
AuthorsCumming, I., and J. Wang
Conference NameGeoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International
Pagination1126 - 1128 vol.2
Date Publishedjun.
Keywordsblock coding scheme, compression performance, data compression, HH channels, HV channels, image coding, information redundancy, optimal bit allocation, phase differences, polarimetric channels, polarimetric data, polarimetric SAR data compression, radar imaging, radar intensity images, radar polarimetry, SAR image data, single-channel SAR data, SIR-C data, spaceborne radar, spatial blocks, synthetic aperture radar, transform coding, VV channels, wavelet compression schemes, wavelet method, wavelet packets, wavelet transforms

Previously progress has been made in designing wavelet compression schemes for SAR image data. In this paper, we propose an improvement to the wavelet method based on a subdivision of the image into blocks, so that an optimal bit allocation can be made based on each block's statistics. Unlike single-channel SAR data, polarimetric data have HH, VV and HV channels of radar intensity images, plus the phase differences between them. We examine the information redundancy among these channels, and optimize the block coding scheme across the polarimetric channels and spatial blocks to improve compression performance. Experimental results using SIR-C data show significant improvement in coding efficiency.


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