Optical image transformation apparatus

Details Optical image transformation apparatus Optical image transformation apparatus

1987-07-13

1989-01-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

365112, H01J 4014

Patent

active

048002887

ABSTRACT:
A plurality of photocells are two-dimensionally arranged on a single light-image receiving plane. Each photocell is connected to first and second sum signal output lines. These lines receive output signals from the photocells through transmission switches, and output sum signals of these signals to an amplifier. The amplifier outputs the difference between the two signals received from the first and second sum signal output lines. A memory stores control signals including weighting data for controlling transmission, isolation, amplification factors, and/or an attenuation factors with respect to the individual transmission switches, and outputs the control signals to the transmission switches. Each transmission switch multiplies or does not multiply the output signal from the corresponding photocell with a specific amplification or attenuation factor, and transmits the product to the first or second sum signal output line. A memory controller writes the weighting data into the memory. A function generator outputs the weighting data of a two-dimensional function.

REFERENCES:
patent: 4161034 (1979-07-01), Stark
patent: 4286328 (1981-08-01), Bocker
patent: 4611124 (1986-09-01), Schneider
Nachrichtentech Electron, vol. 35 (4), pp. 151-154 (1985), "Bildverarbeitung mit Orthogonaltransformation".

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