【発明の名称】光学しきい値処理装置および方法

Japanese Patent JPH03501650

A

An apparatus and method for processing optical beams designed to adaptively spatially threshold or filter an intensity histogram spectrum for re-transformation to a two-dimensional thresholded optical output. Such apparatus and method is used in optical computing and logic processing to selectively pass only certain light intensities, thereby blocking undesirable background noise while passing the desired signals. An incoming histogram light beam, containing an optical position distribution corresponding to the intensity distribution of an original optical beam, is split into first and second beams. The first beam is directed at a light detector array which transforms the optical position intensities of the first beam into directly proportional electrical signals. These signals are sent to a microprocessor which analyzes this input, determines the intensity distribution, calculates the algebraic mean and variance, sets the intensity threshold level based on pre-set information, and sends an electronic voltage signal to an optical selective reflector. The optical reflector, preferably a CCD LCLV, is positioned to receive the second split beam, and is instructed by the electronic voltage signal to selectively reflect only certain optical intensities onto an inverse Fourier transform lens. This lens re-transforms the quasi-one-dimensional second split beam into the desired two-dimensional thresholded optical output.

WO/2010/080030	OPTICAL RANGEFINDER AN IMAGING APPARATUS WITH CHIRAL OPTICAL ARRANGEMENT
JPH04181915	IMAGE PICKUP DEVICE
JPS5810715	INSPECTION OF OBJECT

Softer, bernard, etch
Ovetsuko, Lily

JP50193889A

April 11, 1991

November 28, 1988

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HIUSE Aircraft Company

G02B27/46; G06V10/88; G01J1/42; (IPC1-7): G02B27/46; G01J1/42

Takehiko Suzue (3 outside)

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