28 December 2000 Visually lossless data compression technique for real-time frame/pushbroom space imagers
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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.
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Pen-Shu Yeh, Pen-Shu Yeh, Jack Venbrux, Jack Venbrux, Prakash Bhatia, Prakash Bhatia, Warner Miller, Warner Miller, } "Visually lossless data compression technique for real-time frame/pushbroom space imagers", Proc. SPIE 4115, Applications of Digital Image Processing XXIII, (28 December 2000); doi: 10.1117/12.411556; https://doi.org/10.1117/12.411556
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