Computer Generated Hologram and Magneto-Optic Spatial Light Modulator for Optical Pattern Recognition.

Abstract

This thesis investigates the integration of an optical system for real-time position, scale, and rotation invariant pattern recognition. Specifically a Litton Magneto-Optic Spatial Light Modulator is interfaced to a Zenith 248 microcomputer and AT&T frame grabber. A user interfaces written in C allowed arbitrary patterns to be written to the SLM by a user. Patterns can be generated in computer code, transferred form a CCD camera (via the frame grabber), taken from an image file on computer disk, or taken from a VAX image file. The ability to locally generate a computer generated hologram using the computer generated interferogram method on the Sun workstations and Imagen laser printer was developed. The CGH developed was used in an optical coordinate transformation to create a position, scale, and rotation invariant feature space. CCD cameras were used throughout the optical processor for display/analysis. The entire system was developed and tested using various templates and real scenes.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA189553

Entities

People

  • Michael W. Mayo

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Cyber
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • C Programming Language
  • Carrier Frequencies
  • Charge Coupled Devices
  • Classification
  • Computer Programming
  • Computers
  • Distortion
  • Electrical Engineering
  • Engineering
  • High Resolution
  • Operating Systems
  • Optical Correlators
  • Optical Modulators
  • Pattern Recognition
  • Personal Computers
  • Recognition
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Computer Vision.
  • Image Processing and Computer Vision.

Technology Areas

  • AI & ML
  • Directed Energy
  • Space