Point process analysis of noise in early invertebrate vision
Fig 5
General integrate-fire-Snyder scheme.
The standard Snyder filter gives the optimal (MMSE) intensity estimate given known photons. The random square wave intensity producing these photons delineates the on-off times in the interrupted light model. The MMSE estimate exactly characterises achievable performance at the front end of the cascade. The photons are converted into bumps by the cascade. The integrate-fire uses an optimised threshold to convert these bumps into estimated photons. These estimated photons are then Snyder filtered to obtain a non-MMSE estimator that upper bounds the deterioration introduced by the cascade.