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Journal of Electronic Imaging • Open Access

Application of reversible denoising and lifting steps with step skipping to color space transforms for improved lossless compression
Author(s): Roman Starosolski

Paper Abstract

Reversible denoising and lifting steps (RDLS) are lifting steps integrated with denoising filters in such a way that, despite the inherently irreversible nature of denoising, they are perfectly reversible. We investigated the application of RDLS to reversible color space transforms: RCT, YCoCg-R, RDgDb, and LDgEb. In order to improve RDLS effects, we propose a heuristic for image-adaptive denoising filter selection, a fast estimator of the compressed image bitrate, and a special filter that may result in skipping of the steps. We analyzed the properties of the presented methods, paying special attention to their usefulness from a practical standpoint. For a diverse image test-set and lossless JPEG-LS, JPEG 2000, and JPEG XR algorithms, RDLS improves the bitrates of all the examined transforms. The most interesting results were obtained for an estimation-based heuristic filter selection out of a set of seven filters; the cost of this variant was similar to or lower than the transform cost, and it improved the average lossless JPEG 2000 bitrates by 2.65% for RDgDb and by over 1% for other transforms; bitrates of certain images were improved to a significantly greater extent.

Paper Details

Date Published: 12 August 2016
PDF: 17 pages
J. Electron. Imag. 25(4) 043025 doi: 10.1117/1.JEI.25.4.043025
Published in: Journal of Electronic Imaging Volume 25, Issue 4
Show Author Affiliations
Roman Starosolski, Silesian Univ. of Technology (Poland)

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