Title :
A low complexity overcomplete directional image pyramid
Author :
Rosiles, Jose Gerardo ; Smith, Mark J T
Author_Institution :
Center for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
An undecimated directional filter bank (UDFB) derived from the DFB originally proposed by Bamberger and Smith is proposed. The new UDFB has excellent orientation selectivity, and maintains the low computational complexity from its predecessor. While over complete, the UDFB presents other properties like shift invariance, desirable for some image analysis applications. Using ladder structures the overall directional response is readily controlled by 1D prototypes which are easy to design. We combine the UDFB with over complete pyramidal structures to form directional pyramids with excellent radial and directional selectivity.
Keywords :
channel bank filters; image denoising; image enhancement; image texture; directional image pyramid; directional selectivity; image analysis application; ladder structure; radial selectivity; shift invariance; undecimated directional filter bank; Discrete wavelet transforms; Filter bank; Filtering; Image analysis; Image processing; Image segmentation; Image texture analysis; Nonlinear filters; Prototypes; Signal processing;
Conference_Titel :
Image Processing, 2003. ICIP 2003. Proceedings. 2003 International Conference on
Print_ISBN :
0-7803-7750-8
DOI :
10.1109/ICIP.2003.1247146
