A directional decomposition: theory, design, and implementation
We propose a new directional decomposition of images. Unlike the conventional original directional filter banks (DFB) with eight directional subbands, our DFB has six directional highpass and two lowpass subbands. The newly constructed DFB is maximally decimated and perfect reconstruction. We also show how to implement the new DFB by cascading three two-channels filter banks and discuss filter design issue related to the structure.