Two-Dimensional Digital Filters
Two-Dimensional Digital Filters
A new directional filter bank for image analysis and classification
ICASSP '99 Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 03
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This paper proposes an analytical design method for a class of two-dimensional recursive digital filters with a shape specified in polar coordinates in the frequency plane. The design begins with an adequate 1D prototype filter, to which a frequency transformation is applied, which leads to a 2D filter with a desired shape. For each specific filter the design consists in finding the appropriate frequency transformation. Here we approach the design of two-directional filters. The resulted filters are efficient, of low complexity and high selectivity. Simulation results on a test image are finally provided, to show their capabilities in image filtering.