Title :
Improved structures of maximally decimated directional filter Banks for spatial image analysis
Author :
Park, Sang-II ; Smith, Mark J T ; Mersereau, Russell M.
Author_Institution :
Motorola Inc., Austin, TX, USA
Abstract :
This paper introduces an improved structure for directional filter banks (DFBs) that preserves the visual information in the subband domain. The new structure achieves this outcome while preserving both the efficient polyphase implementation and the exact reconstruction property. The paper outlines a step-by-step framework in which to examine the DFB, and within this framework discusses how, through the insertion of post-sampling matrices, visual distortions can be removed. In addition to the efficient tree structure, attention is given to the form and design of efficient linear phase filters. Most notably, linear phase IIR prototype filters are presented, together with the design details. These filters can enable the DFB to have more than a three-fold improvement in complexity reduction over quadrature mirror filters (QMFs).
Keywords :
IIR filters; image reconstruction; image sampling; linear phase filters; matrix algebra; quadrature mirror filters; QMF; directional filter banks; linear phase IIR prototype filter; post-sampling matrices; quadrature mirror filter; spatial image analysis; tree structure; visual information; Channel bank filters; Filter bank; Filtering; Frequency; IIR filters; Image analysis; Image edge detection; Image reconstruction; Multidimensional systems; Nonlinear filters; Algorithms; Artificial Intelligence; Computer Graphics; Image Enhancement; Image Interpretation, Computer-Assisted; Imaging, Three-Dimensional; Information Storage and Retrieval; Numerical Analysis, Computer-Assisted; Pattern Recognition, Automated; Reproducibility of Results; Sensitivity and Specificity; Signal Processing, Computer-Assisted; Subtraction Technique;
Journal_Title :
Image Processing, IEEE Transactions on
DOI :
10.1109/TIP.2004.836186