3-D directional filter banks and surfacelets

Yue Lu; Minh N. Do

doi:10.1117/12.621063

17 September 2005 3-D directional filter banks and surfacelets

Yue Lu, Minh N. Do

Proceedings Volume 5914, Wavelets XI; 59141Q (2005) https://doi.org/10.1117/12.621063
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

In 1992, Bamberger and Smith proposed the directional filter bank (DFB) for an efficient directional decomposition of two-dimensional (2-D) signals. Due to the nonseparable nature of the system, extending the DFB to higher dimensions while still retaining its attractive features is a challenging and previously unsolved problem. This paper proposes a new family of filter banks, named 3DDFB, that can achieve the directional decomposition of 3-D signals with a simple and efficient tree-structured construction. The ideal passbands of the proposed 3DDFB are rectangular-based pyramids radiating out from the origin at different orientations and tiling the whole frequency space. The proposed 3DDFB achieves perfect reconstruction. Moreover, the angular resolution of the proposed 3DDFB can be iteratively refined by invoking more levels of decomposition through a simple expansion rule. We also introduce a 3-D directional multiresolution decomposition, named the surfacelet transform, by combining the proposed 3DDFB with the Laplacian pyramid. The 3DDFB has a redundancy factor of 3 and the surfacelet transform has a redundancy factor up to 24/7.

Citation Download Citation

Yue Lu and Minh N. Do "3-D directional filter banks and surfacelets", Proc. SPIE 5914, Wavelets XI, 59141Q (17 September 2005); https://doi.org/10.1117/12.621063

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