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Proceedings Paper

Limitations Of Subtraction Techniques Applied To Incoherent Optical Image Restoration
Author(s): P. Chavel
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Paper Abstract

Incoherent optical information processing is known to be far less sensitive to noise than coherent processing. However, if positive and negative quantities have to be implemented, as is normally the case in image restoration, incoherent convolution can be used only in a three-step process involving two convolutions and one subtraction. This communication describes the difficulties which appear in that case and which in part offset the noise advantage of incoherent illumination; alignment and normalization of the two images to be subtracted are critical issues. If the subtraction is performed optically, the dynamic range of this operation is an additional problem which is discussed here on a specific example.

Paper Details

Date Published: 25 April 1980
PDF: 10 pages
Proc. SPIE 0218, Devices and Systems for Optical Signal Processing, (25 April 1980); doi: 10.1117/12.958518
Show Author Affiliations
P. Chavel, University of Southern California (United States)


Published in SPIE Proceedings Vol. 0218:
Devices and Systems for Optical Signal Processing
Timothy C. Strand; Armand R. Tanguay, Editor(s)

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