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On the detection of signals in non-white noise

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image of Spatial Vision
For more content, see Multisensory Research and Seeing and Perceiving.

We have studied the detection, by human observers, of suprathreshold bandlimited signals embedded at various locations in non-white, Gaussian filtered noise. Detection models based upon the direct cross-correlation between the signal and the noise image (matched filtering) cannot account for the results of our experiments. Our findings point instead at a detection process occurring at the level of signal decomposition, and jointly determined by: (a) the differential outputs of discrete, bandlimited spatial analyzers selectively responsive to different components of the signal; and (b) variable detection rules adaptively related to such outputs and to the type of signal information available to the observer.

Affiliations: 1: Department of Psychology, University of Alberta, Edmonton, Alberta T6G 2E9, Canada

10.1163/156856887X00015
/content/journals/10.1163/156856887x00015
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/content/journals/10.1163/156856887x00015
1987-01-01
2016-12-09

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