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Detection of gratings and small features in speckle imagery

Korwar, Vijaya N. and Pierce, John R. (1981) Detection of gratings and small features in speckle imagery. Applied Optics, 20 (2). pp. 312-319. ISSN 0003-6935.

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The extent of picture degradation of speckle, in particular in synthetic aperture radar pictures, has been investigated in the cases where an observer has to detect (a) a small feature immersed in a darker background, and (b) a square wave grating. In each case, a theoretical model is developed for the observer's detection mechanism, and the probability of correct decision is related to relevant picture parameters such as contrast, looks per pixel, and size. These calculations are verified by psychophysical experiments using computer-simulated pictures. Detectability of gratings as a criterion for characterizing picture quality is shown to be far inferior to feature detectability.

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Additional Information:© Copyright 1981 Optical Society of America Received 24 June 1980. This work was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, under contract NAS7-100, sponsored by the National Aeronautics and Space Administration.
Issue or Number:2
Record Number:CaltechAUTHORS:KORao81a
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5180
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Deposited On:04 Oct 2006
Last Modified:02 Oct 2019 23:20

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