Empirical Evaluation of Boundary Policies for Wavelet-based Image Coding

Schremmer, Claudia

URL: http://download.springer.com/static/pdf/330/chp%25...
Document Type: Conference or workshop publication
Year of publication: 2001
Book title: Wavelet analysis and its applications : Second International Conference, WAA 2001, Hong Kong, China, December 18 - 20, 2001, proceedings
The title of a journal, publication series: Lecture Notes in Computer Science
Volume: 2251
Page range: 4-15
Publisher: Tang, Yuan Yan
Place of publication: Berlin [u.a.]
Publishing house: Springer
ISBN: 3-540-43034-2
ISSN: 0302-9743 , 1611-3349
Publication language: English
Institution: School of Business Informatics and Mathematics > Praktische Informatik IV (Effelsberg 1989-2017)
Subject: 004 Computer science, internet
Abstract: The wavelet transform has become the most interesting new algorithm for still image compression. Yet there are many parameters within a wavelet analysis and synthesis which govern the quality of a decoded image. In this paper, we discuss different image boundary policies and their implications for the decoded image. A pool of gray-scale images has been wavelet-transformed at different settings of the wavelet filter bank and quantization threshold and with three possible boundary policies. Our empirical evaluation is based on three benchmarks: a first judgment regards the perceived quality of the decoded image. The compression rate is a second crucial factor. Finally, the best parameter settings with regard to these two factors is weighted with the cost of implementation. Contrary to the JPEG2000 standard, where mirror padding is implemented, our investigation proposes circular convolution as the boundary treatment.

Dieser Eintrag ist Teil der Universitätsbibliographie.

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