14 March 2013 Visible contrast energy metrics for detection and discrimination
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Abstract
Contrast energy was proposed by Watson, Barlow, and Robson (Science, 1983) as a useful metric for representing luminance contrast target stimuli because it represents the detectability of the stimulus in photon noise for an ideal observer. We propose here the use of visible contrast energy metrics for detection and discrimination among static luminance patterns. The visibility is approximated with spatial frequency sensitivity weighting and eccentricity sensitivity weighting. The suggested weighting functions revise the Standard Spatial Observer (Watson and Ahumada, J. Vision, 2005) for luminance contrast detection , extend it into the near periphery, and provide compensation for duration. Under the assumption that the detection is limited only by internal noise, both detection and discrimination performance can be predicted by metrics based on the visible energy of the difference images.
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Albert J. Ahumada, Albert J. Ahumada, Andrew B. Watson, Andrew B. Watson, } "Visible contrast energy metrics for detection and discrimination", Proc. SPIE 8651, Human Vision and Electronic Imaging XVIII, 86510D (14 March 2013); doi: 10.1117/12.2009383; https://doi.org/10.1117/12.2009383
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