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Learning the nonlinearity of neurons from natural visual stimuli

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons84006

Kayser,  K
Research Group Physiology of Sensory Integration, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zitation

Kayser, K., Kording, K., & König, P. (2003). Learning the nonlinearity of neurons from natural visual stimuli. Neural Computing, 15(8), 1751-1759. doi:10.1162/08997660360675026.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-DBEC-B
Zusammenfassung
Learning in neural networks is usually applied to parameters related to linear kernels and keeps the nonlinearity of the model fixed. Thus, for successful models, properties and parameters of the nonlinearity have to be specified using a priori knowledge, which often is missing. Here, we investigate adapting the nonlinearity simultaneously with the linear kernel. We use natural visual stimuli for training a simple model of the visual system. Many of the neurons converge to an energy detector matching existing models of complex cells. The overall distribution of the parameter describing the nonlinearity well matches recent physiological results. Controls with randomly shuffled natural stimuli and pink noise demonstrate that the match of simulation and experimental results depends on the higher-order statistical properties of natural stimuli.