Paper
28 December 1981 Image Quality Effects In Optical Correlators
David Casasent, Saulius Eiva, B. V. K. Vijaya Kumar
Author Affiliations +
Abstract
Three aspects of image quality and their effects in an optical matched spatial filter correlator are described. These concern operation on: digitized imagery, data with low modulation and low space bandwidth product, and synthetic reference imagery. To address these practical problems, we employ: spatial filtering, edge enhancement, use of different apertures, photoreduced imagery, and digital preprocessed data. The first exuerimental data on optical matched spatial filter correlations with synthetic reference imagery and the first comparative data on digitally and optically processed multisensor image correlations are included. From these experiments, we find an optical weighted matched spatial filter correlator to be adequate for most multisensor data and that advanced digital preprocessing operators are necessary when presently available synthetic reference imagery is used.
© (1981) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David Casasent, Saulius Eiva, and B. V. K. Vijaya Kumar "Image Quality Effects In Optical Correlators", Proc. SPIE 0310, Image Quality, (28 December 1981); https://doi.org/10.1117/12.932867
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KEYWORDS
Spatial frequencies

Modulation

Signal to noise ratio

Sensors

Image quality

Optical correlators

Spatial filters

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