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GPU Lossless Hyperspectral Data Compression SystemHyperspectral imaging systems onboard aircraft or spacecraft can acquire large amounts of data, putting a strain on limited downlink and storage resources. Onboard data compression can mitigate this problem but may require a system capable of a high throughput. In order to achieve a high throughput with a software compressor, a graphics processing unit (GPU) implementation of a compressor was developed targeting the current state-of-the-art GPUs from NVIDIA(R). The implementation is based on the fast lossless (FL) compression algorithm reported in "Fast Lossless Compression of Multispectral-Image Data" (NPO- 42517), NASA Tech Briefs, Vol. 30, No. 8 (August 2006), page 26, which operates on hyperspectral data and achieves excellent compression performance while having low complexity. The FL compressor uses an adaptive filtering method and achieves state-of-the-art performance in both compression effectiveness and low complexity. The new Consultative Committee for Space Data Systems (CCSDS) Standard for Lossless Multispectral & Hyperspectral image compression (CCSDS 123) is based on the FL compressor. The software makes use of the highly-parallel processing capability of GPUs to achieve a throughput at least six times higher than that of a software implementation running on a single-core CPU. This implementation provides a practical real-time solution for compression of data from airborne hyperspectral instruments.
Document ID
20140002366
Acquisition Source
Headquarters
Document Type
Other - NASA Tech Brief
Authors
Aranki, Nazeeh I.
(California Inst. of Tech. Pasadena, CA, United States)
Keymeulen, Didier
(California Inst. of Tech. Pasadena, CA, United States)
Kiely, Aaron B.
(California Inst. of Tech. Pasadena, CA, United States)
Klimesh, Matthew A.
(California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
March 26, 2014
Publication Date
January 1, 2014
Publication Information
Publication: NASA Tech Briefs, January 2014
Subject Category
Computer Programming And Software
Report/Patent Number
NPO-48571
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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