Show simple item record

dc.contributor.authorGove, Alanen_US
dc.contributor.authorGrossberg, Stephenen_US
dc.contributor.authorMingolla, Ennioen_US
dc.date.accessioned2011-11-14T18:19:20Z
dc.date.available2011-11-14T18:19:20Z
dc.date.issued1993-01
dc.identifier.urihttps://hdl.handle.net/2144/1998
dc.description.abstractA neural network model of early visual processing offers an explanation of brightness effects often associated with illusory contours. Top-down feedback from the model's analog of visual cortical complex cells to model lateral geniculate nucleus (LGN) cells are used to enhance contrast at line ends and other areas of boundary discontinuity. The result is an increase in perceived brightness outside a dark line end, akin to what Kennedy (1979) termed "brightness buttons" in his analysis of visual illusions. When several lines form a suitable configuration, as in an Ehrenstein pattern, the perceptual effect of enhanced brightness can be quite strong. Model simulations show the generation of brightness buttons. With the LGN model circuitry embedded in a larger model of preattentive vision, simulations using complex inputs show the interaction of the brightness buttons with real and illusory contours.en_US
dc.description.sponsorshipDefense Advanced Research Projects Agency (AFOSR 90-0083, ONR N00014-92-J-4015); Office of Naval Research (N00014-91-J-4100); Air Force Office of Scientific Research (90-0175, F49620-92-J-0334)en_US
dc.language.isoen_US
dc.publisherBoston University Center for Adaptive Systems and Department of Cognitive and Neural Systemsen_US
dc.relation.ispartofseriesBU CAS/CNS Technical Reports;CAS/CNS-TR-1993-021
dc.rightsCopyright 1993 Boston University. Permission to copy without fee all or part of this material is granted provided that: 1. The copies are not made or distributed for direct commercial advantage; 2. the report title, author, document number, and release date appear, and notice is given that copying is by permission of BOSTON UNIVERSITY TRUSTEES. To copy otherwise, or to republish, requires a fee and / or special permission.en_US
dc.titleBrightness Perception, Illusory Contours and Corticogeniculate Feedbacken_US
dc.typeTechnical Reporten_US
dc.rights.holderBoston University Trusteesen_US
dc.relation.isnodouble1970


This item appears in the following Collection(s)

Show simple item record