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Proceedings Paper

Rate-controlled near-lossless image codec based on visual perception and content adaptability
Author(s): Jianmin Jiang; Shuyuan Yang
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Paper Abstract

A content adaptive near lossless image codec is designed in this paper to accommodate a visual perception based rate control scheme. The near lossless codec is a modified version of JPEG-LS, in which the modification is typified by the addition of: (i) two levels of information loss distribution; (ii) line-fitting target prediction; and (iii) visual perception based rate control, implemented via quantization and redistribution of distortion. To minimise the possible excessive information loss being introduced during the rate control process, a technology of so-called moving-across-arrays is proposed to arrange the adjustment of distortion levels. Combined with the line-fitting based target prediction, the proposed scheme successfully controls the compression ratio within a limited range of targets, yet the decoded image quality is maintained competitive to JPEG-LS, the non-controlled one. Extensive experiments are carried out to show that the proposed scheme achieves effective rate control for a range of image samples and competitive image quality in terms of visual perception.

Paper Details

Date Published: 22 March 2001
PDF: 11 pages
Proc. SPIE 4209, Multimedia Systems and Applications III, (22 March 2001); doi: 10.1117/12.420827
Show Author Affiliations
Jianmin Jiang, Univ. of Glamorgan (United Kingdom)
Shuyuan Yang, Institute of Acoustics (China)

Published in SPIE Proceedings Vol. 4209:
Multimedia Systems and Applications III
Andrew G. Tescher; Bhaskaran Vasudev; V. Michael Bove Jr., Editor(s)

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