Optoelectronic image processor for Gabor filter-based machine vision applications

Hakan Urey; William T. Rhodes

doi:10.1117/12.256145

1 November 1996 Optoelectronic image processor for Gabor filter-based machine vision applications

Hakan Urey, William T. Rhodes

Proceedings Volume 2848, Materials, Devices, and Systems for Optoelectronic Processing; (1996) https://doi.org/10.1117/12.256145
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

Citation Download Citation

Hakan Urey and William T. Rhodes "Optoelectronic image processor for Gabor filter-based machine vision applications", Proc. SPIE 2848, Materials, Devices, and Systems for Optoelectronic Processing, (1 November 1996); https://doi.org/10.1117/12.256145

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