MICROCOMPUTER BASED DIGITAL IMAGE PROCESSING SYSTEM DEVELOPED TO COUNT AND SIZE LASER-GENERATED SMALL PARTICLE IMAGES.

K. D. Ahlers, D. R. Alexander

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

A digital image processing system has been developed to count and size laser-generated small particle images. Processing rates of 5 to 600 frames per minute were achieved by utilizing a real-time digital image processor. Particles from 7 to 700 mu m in the plane of focus were counted and sized. Emphasis was to determine the problems and limitations involved with using a digital image processing scheme to accurately size particles. Areas investigated include the effect of the threshold level on measured particle size, particle boundary diffraction gray-level gradients, and geometric nonlinearities introduced by the vidicon camera. A calibration reticle containing simulated particles from 5. 29 to 92. 75 mu m in diam was used for an in-depth calibration process.

Original languageEnglish (US)
Pages (from-to)1060-1065
Number of pages6
JournalOptical Engineering
Volume24
Issue number6
StatePublished - Nov 1985

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)

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