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Title: Position, rotation, and intensity invariant recognizing method

Abstract

A method for recognizing the presence of a particular target in a field of view which is target position, rotation, and intensity invariant includes the preparing of a target-specific invariant filter from a combination of all eigen-modes of a pattern of the particular target. Coherent radiation from the field of view is then imaged into an optical correlator in which the invariant filter is located. The invariant filter is rotated in the frequency plane of the optical correlator in order to produce a constant-amplitude rotational response in a correlation output plane when the particular target is present in the field of view. Any constant response is thus detected in the output The U.S. Government has rights in this invention pursuant to Contract No. DE-AC04-76DP00789 between the U.S. Department of Energy and AT&T Technologies, Inc.

Inventors:
 [1];  [2];  [3]
  1. (Pleasanton, CA)
  2. (San Ramon, CA)
  3. (Alamo, CA)
Issue Date:
Research Org.:
AT & T CORP
OSTI Identifier:
866994
Patent Number(s):
4838644
Assignee:
United States of America as represented by United States (Washington, DC) SNL
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
position; rotation; intensity; invariant; recognizing; method; presence; particular; target; field; view; preparing; target-specific; filter; combination; eigen-modes; pattern; coherent; radiation; imaged; optical; correlator; located; rotated; frequency; plane; produce; constant-amplitude; rotational; response; correlation; output; constant; detected; government; rights; pursuant; contract; de-ac04-76dp00789; department; energy; technologies; coherent radiation; target position; intensity invariant; /359/382/708/

Citation Formats

Ochoa, Ellen, Schils, George F., and Sweeney, Donald W. Position, rotation, and intensity invariant recognizing method. United States: N. p., 1989. Web.
Ochoa, Ellen, Schils, George F., & Sweeney, Donald W. Position, rotation, and intensity invariant recognizing method. United States.
Ochoa, Ellen, Schils, George F., and Sweeney, Donald W. Sun . "Position, rotation, and intensity invariant recognizing method". United States. https://www.osti.gov/servlets/purl/866994.
@article{osti_866994,
title = {Position, rotation, and intensity invariant recognizing method},
author = {Ochoa, Ellen and Schils, George F. and Sweeney, Donald W.},
abstractNote = {A method for recognizing the presence of a particular target in a field of view which is target position, rotation, and intensity invariant includes the preparing of a target-specific invariant filter from a combination of all eigen-modes of a pattern of the particular target. Coherent radiation from the field of view is then imaged into an optical correlator in which the invariant filter is located. The invariant filter is rotated in the frequency plane of the optical correlator in order to produce a constant-amplitude rotational response in a correlation output plane when the particular target is present in the field of view. Any constant response is thus detected in the output The U.S. Government has rights in this invention pursuant to Contract No. DE-AC04-76DP00789 between the U.S. Department of Energy and AT&T Technologies, Inc.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

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