Character Identification by Holography and Coherent Spatial Filtering.

Abstract

Techniques of coherent spatial filtering for character reading are examined. Fourier holograms are used as filters. Methods for improving character selectivity are investigated. The practical considerations for applying these techniques are discussed and the advantages of a coherent optical character reader over a conventional one are listed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1971
Accession Number
AD0737182

Entities

People

  • George Constantinou

Organizations

  • United States Army Communications-Electronics Command

Tags

DTIC Thesaurus Topics

  • Filters
  • Filtration
  • Holograms
  • Holography
  • Personality
  • Spatial Filtering

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Optical Physics and Photonics.
  • Theoretical Analysis.