Television – Camera – system and detail – Solid-state image sensor
Patent
1996-04-01
2000-07-04
Garber, Wendy
Television
Camera, system and detail
Solid-state image sensor
348308, H04N 5335
Patent
active
060846356
ABSTRACT:
An image sensor is described which provides a smoothed output without storing data from photoelectric conversion elements at off-chip data storage device(s). The image sensor includes a plurality of neuron MOSFETs and a plurality of photoelectric conversion elements, each photoelectric conversion element corresponding to one of the plurality of neuron MOSFETS. Each neuron MOSFET has at least a primary input gate, two or more secondary input gates and an output. The primary input gate of each neuron MOSFET is coupled to its corresponding photoelectric conversion element. The secondary input gates are coupled to selected ones of the other photoelectric conversion elements. A switch is coupled to the output of each of the plurality of neuron MOSFETs. The switch selectively couples each of the plurality of neuron MOSFETs to an output of the image sensor. In order to provide edge detection, a plurality of MOSFETs are provided, each having an input coupled to a respective photoelectric conversion element. A second switch is provided to selectively couple an output of each MOSFET to an pixel output of the image sensor. When the difference between the smoothed output and pixel output changes drastically over a short distance (e.g. 2 photoelectric conversion elements), an edge is identified.
REFERENCES:
patent: 4831658 (1989-05-01), Umeda et al.
patent: 5258657 (1993-11-01), Shibara et al.
Darling, et al.-System Issues in The Implementation of Sensory Neural Network Photodetector Arrays; 1991; IEEE Pacific Rim Conference on Communications, Computers and Signal Processing; pp. 242-245.
Fossum; Architectures for Focalplane Image Processing; Aug. 1989, Optical Engineering, vol. 28 No. 8; pp. 865-871.
Christensen Andrew B.
Garber Wendy
Olympus Optical Co,. Ltd.
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