AEROSOL SCATTERING EFFECT ON RESOLVING POWER OF IMAGING SYSTEMS

Authors
  1. Bissonnette, L.R.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
The report describes a method of calculating the point spread and modulation transfer functions for imaging through aerosol media. The method is based on the image solution of a point source determined with the DREV multiple-scattering propagation model. Results are presented that illustrate the effects of particle size, wavelength, extinction coefficient and geometry. The calculated modulation transfer functions show that aerosol scattering can have both positive and adverse effects on the performance of military imaging systems depending on the function considered, e.g. detection versus recognition. The solutions are also applicable to image enhancement algorithms and could potentially be inverted to provide information on particle sizes. Comparisons with measurements show good consistency but no systematic validation is performed because the available image and aerosol data are not sufficiently documented or are outside the range of validity of the propagation model.
Report Number
DREV-4617/90 —
Date of publication
15 Nov 1990
Number of Pages
29
DSTKIM No
90-04890
CANDIS No
67119
Format(s):
Hardcopy;Originator's fiche received by DSIS

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