This filter apply the epipolar correction (loading pixel correspondance tables
previously computed using matlab or other tools)
to one retina only here (epipolar correction is appply to two retinas used in stereo
but slightly angled toward each other) so that pixel at the same height appears
on the same y line)
One must select which retina to correct, left or non left
(should be easily adapted to any configuration)
To correct both retinae, one must use two instances of this filter
This filter processes BinocularEvents (generated by the stereoboard chip for example)
to let pass event through according to two criteria : Left or Right retina
and (added for convenience) ON or OFF events
(This filter may be slowing down real-time applications)