Boundary handling mechanism for lifting-based spatial adaptation of filter banks
Date of Issue2012
Image Processing: Algorithms and Systems X; and Parallel Processing for Imaging Applications (2nd : 2012 : Burlingame, USA)
School of Electrical and Electronic Engineering
Time/space varying filter banks (FBs) are proved to be useful in building signal adaptive transforms. Lifting factorization of FBs allows to spatially adapt between arbitrary FBs, avoiding the need to design border FBs to complete perfect reconstruction (PR) during the transition. However, lifting based switching between arbitrarily designed FBs induces spurious transients into the resulting subbands during the transition. In this paper we propose a boundary handling mechanism that maintains good frequency response and eliminates the transients during the transition. We successfully show spatial adaptation between JPEG2000 9/7 and 5/3 FBs to reduce the ringing artifacts in images.
© 2012 SPIE. This paper was published in Proceedings of SPIE - Image Processing: Algorithms and Systems X; and Parallel Processing for Imaging Applications II and is made available as an electronic reprint (preprint) with permission of SPIE. The paper can be found at the following official DOI: [http://dx.doi.org/10.1117/12.909555]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.