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Proceedings Paper

Toward objective image quality metrics: the AIC Eval Program of the JPEG
Author(s): Thomas Richter; Chaker Larabi
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Paper Abstract

Objective quality assessment of lossy image compression codecs is an important part of the recent call of the JPEG for Advanced Image Coding. The target of the AIC ad-hoc group is twofold: First, to receive state-of-the-art still image codecs and to propose suitable technology for standardization; and second, to study objective image quality metrics to evaluate the performance of such codes. Even tthough the performance of an objective metric is defined by how well it predicts the outcome of a subjective assessment, one can also study the usefulness of a metric in a non-traditional way indirectly, namely by measuring the subjective quality improvement of a codec that has been optimized for a specific objective metric. This approach shall be demonstrated here on the recently proposed HDPhoto format14 introduced by Microsoft and a SSIM-tuned17 version of it by one of the authors. We compare these two implementations with JPEG1 in two variations and a visual and PSNR optimal JPEG200013 implementation. To this end, we use subjective and objective tests based on the multiscale SSIM and a new DCT based metric.

Paper Details

Date Published: 15 September 2008
PDF: 12 pages
Proc. SPIE 7073, Applications of Digital Image Processing XXXI, 70730X (15 September 2008); doi: 10.1117/12.795096
Show Author Affiliations
Thomas Richter, Univ. Stuttgart (Germany)
Chaker Larabi, Univ. of Poitiers, XLIM-SIC, UMR CNRS 6172 (France)

Published in SPIE Proceedings Vol. 7073:
Applications of Digital Image Processing XXXI
Andrew G. Tescher, Editor(s)

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