The retina package

This python package provides an implementation of the Virtual Retina developed by Adrien Wohrer. It uses theano to simulate spike trains of retinal ganglion cells by directing the input through a number of computation nodes. Each node might do linear or nonlinear computations, eg. convolve the inpute with a spatio-temporal kernel or apply gain control.

• retina.py provides a VirtualRetina class and corresponding computation nodes
  • the VirtualRetina class computes the entire cascade of nodes
  • each node can retain its state, such that input can be chunked
• retina_base.py provides general functions for creating kernels
• retina_virtualretina.py provides default configuration options (as a dictionary) and methods for writing xml configuration files for the original program
• vison.py aims at reimplementing the nodes in a more general framework, such that they can be used for any vision computation.