Connectionists: on-line simulation tools for simple, complex, grating and dot-pattern selective cells

[Nicolai Petkov]

On-line simulation tools for retinal-ganglion, LGN, simple, complex,
grating and dot-pattern selective cells and non-classical receptive
field inhibition are available at 
http://matlabserver.cs.rug.nl/


Gabor filters:
visualize Gabor functions, 
use a Gabor filter and a Gabor-energy filter, 
perform edge detection, 
simulate simple and complex cells (visual cortex), 
extract texture features, 
simulate non-classical receptive field inhibition or surround
suppression (visual cortex), 
perform contour detection, 
explain certain visual perception effects. 

Centre-Surround cell (DoG) operator and Dot-pattern selective cell
operator:
visualize Difference of Gaussian (DoG) functions, 
simulate retinal-ganglion and LGN cells, 
compute the convolution of an input image with a DoG (center-surround
cell responses), 
detect intensity spots, 
detect groups of intensity spots, 
detect dot-pattern texture. 

Grating cell operator:
Detect gratings