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 language | English (US) |
|---|---|
| Pages (from-to) | 1060-1065 |
| Number of pages | 6 |
| Journal | Optical Engineering |
| Volume | 24 |
| Issue number | 6 |
| State | Published - Nov 1985 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Engineering(all)