Halftone screen techniques for photographic film response shaping with application to optical processing of medical x-ray images

I. Glaser, H. H. Barrett

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Optical image processing is notoriously sensitive to nonlinearities in the input medium; many otherwise successful optical processors fail to perform adequately outside the laboratory environment because of this problem. The usual solutions to the problem-use of special photographic emulsions, developers, and even preexposure (bias)-severely limit the applicability of many optical processing schemes and may also degrade the SNR of the input image. We present several methods, all using halftone screens, to obtain proper response from the input photographic film. We then demonstrate one particular method, both theoretically and experimentally, as applied to x-ray recording of coded images that are to be used as input for an optical transaxial tomography processor.

Original languageEnglish (US)
Pages (from-to)2294-2300
Number of pages7
JournalApplied optics
Volume18
Issue number13
DOIs
StatePublished - Jul 1979

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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