Abstract：
:Edge detection is widely believed to be an important early stage in human visual processing. However, there have been relatively few attempts to map human edge detection filters. In this study, observers had to locate a randomly placed step edge in brown noise (the integral of white noise) with a 1/f2 power spectrum. Their responses were modelled by assuming the probability the observer chose an edge location depended on the response of their own edge detection filter to that location. The observer's edge detection filter was then estimated by maximum likelihood methods. The filters obtained were odd-symmetric and similar to a derivative of Gaussian, with a peak-to-trough width of 0.1-0.15 degrees. These filters are compared with previous estimates of edge detectors in humans, and with neurophysiological receptive fields and theoretical edge detectors.
journal_name
Vision Resjournal_title
Vision researchauthors
McIlhagga Wdoi
10.1016/j.visres.2018.09.007subject
Has Abstractpub_date
2018-12-01 00:00:00pages
30-36eissn
0042-6989issn
1878-5646pii
S0042-6989(18)30205-0journal_volume
153pub_type
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