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Proceedings Paper

Optoelectronic image processor for Gabor filter-based machine vision applications
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Paper Abstract

We describe an optoelectronic image processor that records in parallel multiresolution Gabor filter components of an image using incoherent light. The bandpass component of the output images is temporally modulated by modifications in the pupil plane. It is separated from spatial lowpass structures with the help of a modified image plane detector. OTF is invariant to shift in the pupil function; this property is used to implement parallel multichannel operation. A VLSI-based detector array is proposed to perform an extremum detection on each image pixel, thereby providing a low-pass representation of the bandpass image energy. Different Gabor-based filter characteristics and arbitrary resolution scale factors can be easily obtained by modifying a binary pupil plane mask. Preliminary experimental results for parallel optical implementation are presented.

Paper Details

Date Published: 1 November 1996
PDF: 13 pages
Proc. SPIE 2848, Materials, Devices, and Systems for Optoelectronic Processing, (1 November 1996); doi: 10.1117/12.256145
Show Author Affiliations
Hakan Urey, Georgia Institute of Technology (Turkey)
William T. Rhodes, Georgia Institute of Technology (France)


Published in SPIE Proceedings Vol. 2848:
Materials, Devices, and Systems for Optoelectronic Processing
John A. Neff; Bahram Javidi, Editor(s)

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