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Proceedings Paper

Visually lossless data compression technique for real-time frame/pushbroom space imagers
Author(s): Pen-Shu Yeh; Jack Venbrux; Prakash Bhatia; Warner Miller
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Paper Abstract

A visually lossless data compression technique is currently being developed for space science applications under the requirement of high-speed push-broom scanning. The technique is also applicable to frame based imaging data. The algorithm first performs a block transform of either a hybrid of modulated lapped transform (MLT) with discrete cosine transform (DCT), or a 2-dimensional MLT. The transform is followed by a bit-plane encoding; this results in an embedded bit string with exact desirable compression rate specified by the user. The approach requires no unique look-up table to maximize its performance and is error-resilient in that error propagation is contained within a few scan lines for push- broom applications. The compression scheme performs well on a suite of test images acquired from spacecraft instruments. Flight qualified hardware implementations are in development; a functional chip set is expected by the end of 2001. The chip set is being designed to compress data in excess of 20 Msamples/sec and support quantization from 2 to 16 bits.

Paper Details

Date Published: 28 December 2000
PDF: 12 pages
Proc. SPIE 4115, Applications of Digital Image Processing XXIII, (28 December 2000); doi: 10.1117/12.411556
Show Author Affiliations
Pen-Shu Yeh, NASA Goddard Space Flight Ctr. (United States)
Jack Venbrux, Univ. of New Mexico (United States)
Prakash Bhatia, Univ. of New Mexico (United States)
Warner Miller, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 4115:
Applications of Digital Image Processing XXIII
Andrew G. Tescher, Editor(s)

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