Title :
Constant-rate wavelet-based image compressor (CWIC)
Author :
Schaefer, Christoph ; Krahn, Edgar
Author_Institution :
Dornier Satellitensyst. GmbH, Friedrichshafen, Germany
Abstract :
A space-qualified, electronic hardware module named CWIC (and pronounced quick) is being developed for the on-board compression of satellite image data. This module is designed for sampling rates of up to 10 mega-samples per second and for a sample resolution of up to 16 bits. Compression is based on a wavelet transform and on a successive approximation quantization and encoding scheme which yields embedded code. The compression module may be used either in fixed quality or in fixed rate modes. Using a bit-true simulation software, the compression performance of CWIC has been evaluated. Evaluation results obtained with a 10 bit satellite image are presented and discussed. A real-time demonstrator will be available in the third quarter of 1999
Keywords :
data compression; geophysical signal processing; geophysical techniques; image coding; remote sensing; terrain mapping; transform coding; wavelet transforms; CWIC; constant-rate wavelet-based image compressor; data compression; electronic hardware module; embedded code; encoding scheme; geophysical mesurement technique; image compression; land surface; military system; on-board compression; remote sensing; satellite image data; successive approximation quantization; terrain mapping; wavelet transform; wavelets; Decorrelation; Discrete wavelet transforms; Filters; Image coding; Image sampling; Instruments; Quantization; Satellites; Streaming media; Transform coding;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.775094
