Modelling adaptation to directional motion using the Adelson-Bergen Energy Sensor

Pavan, Andrea and Contillo, Adriano and Mather, George (2013) Modelling adaptation to directional motion using the Adelson-Bergen Energy Sensor. Plos One, 8 (3). E59298. ISSN 1932-6203

Full content URL: http://www.plosone.org/article/info%3Adoi%2F10.137...

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Abstract

The motion energy sensor has been shown to account for a wide range of physiological and psychophysical results in
motion detection and discrimination studies. It has become established as the standard computational model for retinal
movement sensing in the human visual system. Adaptation effects have been extensively studied in the psychophysical literature on motion perception, and play a crucial role in theoretical debates, but the current implementation of the energy
sensor does not provide directly for modelling adaptation-induced changes in output. We describe an extension of the model to incorporate changes in output due to adaptation. The extended model first computes a space-time representation
of the output to a given stimulus, and then a RC gain-control circuit (‘‘leaky integrator’’) is applied to the time-dependent output. The output of the extended model shows effects which mirror those observed in psychophysical studies of motion adaptation: a decline in sensor output during stimulation, and changes in the relative of outputs of different sensors following this adaptation.

Keywords:Adaptation, Motion processing, Motion sensor, Motion after-effect, oapaid, oaopen
Subjects:C Biological Sciences > C800 Psychology
C Biological Sciences > C850 Cognitive Psychology
Divisions:College of Social Science > School of Psychology
ID Code:8824
Deposited On:08 Apr 2013 14:31

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