Nichtlineare Summation bei Linien und
Gittermustern an der Wahrnehmungsschwelle

Within a wide class of multichannel models of the visual system it is suggested that spatial distributions of luminance are processed by the independent activation of grating detectors, or spatial frequency channels. Probability summation is often described in terms of Quick's nonlinear pooling model (Quick 1974). Using this model, we find evidence for the existence of different kinds of nonlinear summation at threshold: For compound gratings with well separated spatial frequency components the threshold functions indicate nonlinear summation which is \emph{not} compatible with probability summation, while for line patterns well separated in the spatial domain the probability summation rule proves compatible with the data.

Beteiligter Wissenschaftler:

Dr. Günter Meinhardt

Veröffentlichungen:

G. Meinhardt: Evidence for different nonlinear summation schemes for lines and gratings at threshold. Biological Cybernetics 81:263-277 (1999)