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Design of Optimal Quincunx Filter Banks for Image Dept. of Elec. and Comp. Engineering, University of Victoria, Victoria, BC, V8W 3P6, Canada
 

Summary: 1
Design of Optimal Quincunx Filter Banks for Image
Coding
Yi Chen
Dept. of Elec. and Comp. Engineering, University of Victoria, Victoria, BC, V8W 3P6, Canada
Email: ychen@ece.uvic.ca
Michael D. Adams
Dept. of Elec. and Comp. Engineering, University of Victoria, Victoria, BC, V8W 3P6, Canada
Email: mdadams@ece.uvic.ca
Wu-Sheng Lu
Dept. of Elec. and Comp. Engineering, University of Victoria, Victoria, BC, V8W 3P6, Canada
Email: wslu@ece.uvic.ca
Two new optimization-based methods are proposed for the design of high-performance quincunx filter banks for
the application of image coding. These new techniques are used to build linear-phase finite-length-impulse-response
(FIR) perfect-reconstruction (PR) systems with high coding gain, good frequency selectivity, and certain prescribed
vanishing moment properties. A parametrization of quincunx filter banks based on the lifting framework is employed
to structurally impose the PR and linear-phase conditions. Then, the coding gain is maximized subject to a set of
constraints on vanishing moments and frequency selectivity. Examples of filter banks designed using the newly
proposed methods are presented and shown to be highly effective for image coding. In particular, our new optimal
designs are shown to outperform three previously-proposed quincunx filter banks in 72% to 95% of our experimental

  

Source: Adams, Michael D. - Department of Electrical and Computer Engineering, University of Victoria

 

Collections: Engineering