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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 5, Iss. 6 — Jun. 1, 1966
  • pp: 967–969

Complex Spatial Filtering with Binary Masks

B. R. Brown and A. W. Lohmann  »View Author Affiliations


Applied Optics, Vol. 5, Issue 6, pp. 967-969 (1966)
http://dx.doi.org/10.1364/AO.5.000967


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Abstract

Usually a hologram is produced by means of an interference experiment. Here, however, we let a computer-guided plotter draw the hologram. The plot, which has to be minified and recorded on film, contains no grey, only binary transmittance values. Our binary holograms yield reconstructed images of a quality equal to that of images obtained from usual holograms of comparable dimensions. When a Fourier hologram is inserted into the Fraunhofer plane of a coherent image forming system, it acts as a special type of a spatial filter, a so-called optical matched filter. Our binary matched filter is suitable for optical character recognition, the same as the usual optical matched filter introduced by Vander Lugt.

© 1966 Optical Society of America

History
Original Manuscript: February 10, 1966
Published: June 1, 1966

Citation
B. R. Brown and A. W. Lohmann, "Complex Spatial Filtering with Binary Masks," Appl. Opt. 5, 967-969 (1966)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-5-6-967


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References

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