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Subband decomposition strategies for object-based image coding

✍ Scribed by Marcio Albuquerque de Souza; Emilio Carlos Acocella; Abraham Alcaim

Publisher: John Wiley and Sons
Year: 2003
Tongue: English
Weight: 271 KB
Volume: 13
Category: Article
ISSN: 0899-9457
DOI: 10.1002/ima.10054

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✦ Synopsis

Abstract

In order to attain perfect reconstruction, subband decomposition of arbitrarily shaped objects requires special strategies to deal with the decimation problem. One of the two strategies described in this paper (scheme 1) inserts pixels with amplitudes equal to the mean values of the neighboring ones belonging to the object. The requirement of transmitting (coding) these pixels reduces the coding gain and is avoided by the second strategy (scheme 2) examined in this paper. This strategy determines specific values of the pixels added to the object in such a way that they result in predefined amplitudes after decimation. For this reason, this method outperforms scheme 1. PSNR versus bit rate are presented for two objects. © 2003 Wiley Periodicals, Inc. Int J Imaging Syst Technol 13, 179–187, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ima.10054

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