05063602 is referenced by 20 patents and cites 14 patents.

In an image correlation calculation apparatus for optically calculating correlations between reference patterns and an image such as a character or any other figure, the image such as the character or any other figure subjected to correlation calculations is optically multiplied by a multiplier to form simultaneously in parallel a plurality of optical pattern images of a substantially identical shape, and optical correlation calculation between the plurality of optical pattern images and the reference patterns formed on various types of reference masks is performed individually and instantaneously, the various type of reference masks being arranged at a position spaced apart by a predetermined distance from the plurality of optical pattern image, thereby detecting beams emitted through the various types of reference masks. Image multiplication, optical correlation calculation, and transmission of the result of the optical correlation calculation to the photosensors can be simultaneously performed at a light propagation time. The apparatus structure can be simplified at low cost, and image correlation operations can be performed at high speed.

Title
Image correlation calculation apparatus
Application Number
38634
Publication Number
5063602
Application Date
March 26, 1991
Publication Date
November 5, 1991
Inventor
Hisami Nishi
Nishinomiya
JP
Gerald A Pierce
Redwood City
CA, US
James R Young
Palo Alto
CA, US
Norman A Peppers
Belmont
CA, US
Agent
Woodcock Washburn Kurtz Mackiewicz & Norris
Assignee
Nippon Sheet Glass
JP
IPC
G06K 9/74
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