Optoelectronic image processor for multiresolution Gabor filtering

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