Optoelectronic image processor for multiresolution Gabor filtering

Author

Urey, G. Hakan ; Rhodes, William T. ; DeWeerth, Stephen P. ; Drabik, Timothy J.

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

6

fYear

1996

fDate

7-10 May 1996

Firstpage

3236

Abstract

An optoelectronic processor that should allow the implementation of multiresolution Gabor filtering at TV frame rates is described. The system takes the form of a TV camera with modified optics and some simple processing incorporated in the focal-plane detector array. The output of the camera is an array of images, each produced by putting the input image through an angularly-oriented Gabor-type spatial frequency filter and converting the output to baseband. Key elements of the system include: (a) bandpass spatial filtering by pupil modification of an incoherent imaging system, (b) separation of spatial lowpass and spatial bandpass structures by temporal modulation of the bandpass distribution, (c) detection of the temporally modulated distribution by VLSI circuitry in the focal-plane detector array, and (d) multiplexing of multiple spatial bandpass channels in a single smart pixel array

Keywords

band-pass filters; filtering theory; focal planes; image resolution; integrated optoelectronics; modulation; multiplexing; optical information processing; smart pixels; wavelet transforms; TV camera; TV frame rates; VLSI circuitry; angularly oriented spatial frequency filter; bandpass distribution; bandpass spatial filtering; baseband output; focal-plane detector array; incoherent imaging system; input image; multiresolution Gabor filtering; optical processors; optoelectronic image processor; pupil modification; smart pixel array; spatial bandpass channels multiplexing; spatial bandpass structures; spatial lowpass structures; temporal modulation; temporally modulated distribution detection; wavelets; Band pass filters; Cameras; Filtering; Gabor filters; Image resolution; Optical arrays; Optical filters; Sensor arrays; Spatial resolution; TV;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on

Conference_Location

Atlanta, GA

ISSN

1520-6149

Print_ISBN

0-7803-3192-3

Type

conf

DOI

10.1109/ICASSP.1996.550566

Filename

550566