Jonathan A. Marshall and Richard K. Alley reported in their
article "A Self-Organizing Neural Network that Learns to Detect and
Represent Visual Depth from Occlusion Events"
and "Adaptive Perceptual Pattern Recognition by Self-Organizing Neural
Networks: Context, Uncertainty, Multiplicity, and Scale" archived at
that they had used a neuro net program to learn depth perception with
and on channel and off channel. The learning rule uses disinhibitory
signals emitted from the on channel to trigger learning in the off
The neural network "EXIN" self organize in excitatory + inhibitory
networks. The new learning rule allows for superposition of
multiple simultaneous neural activation.