This study focuses on improving capabilities of a single-band lossless JPEG-LS encoder with a preprocessing unit. Main motivation is preserving its genuine low complexity that enables high-throughput hardware implementations. Although JPEG-LS standard describes procedures for near-lossless and multicomponent compression, a conveniently designed preprocessor unit can easily bestow any single-band lossless JPEG-LS encoder gain these capabilities without change on itself. Similarly, its compression performance can be improved with selective compression. Idea depends on the detection of regions out-of-interest (cloud, snow etc.) employing their distinct spectral signature and remapping pixels in these regions so that highest compression with the JPEG-LS can be yielded based on its algorithm. Regions out-ofinterest can be compressed regardless of the outcome quality as they contain no significant information. Through analyses are achieved on satellite images for the preprocess approaches with software. Besides, designed preprocessor unit is implemented with field-programmable-gate-array (FPGA) and implementation details are provided.

Date Published: 1 May 2017
PDF: 11 pages
Proc. SPIE 10223, Real-Time Image and Video Processing 2017, 102230J (1 May 2017); doi: 10.1117/12.2262272

Published in SPIE Proceedings Vol. 10223:
Real-Time Image and Video Processing 2017
Nasser Kehtarnavaz; Matthias F. Carlsohn, Editor(s)