iModel
Related models

DS_Gabor_One
MEO_Gabor
ME_Gabor
MEO_Gabor_Rot
ME_Gabor_Rot
RD_Exp_T
RD_2Gabor
RD_2Gabor_Rect


Variations

RD_2Gabor

RD_2Gabor
1/2 Reichardt Detector from Two Gabor Filters
Summary

This model is inspired by the Reichardt Detector (RD). It consists of the product of the outputs of two linear Gabor filters that are in quadrature phase. The signal from the even Gabor filter is delayed before the multiplication. This is a non-opponent model, and thus only 1/2 of a typical Reichardt detector.


Results

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References

  • Reichardt W (1957) Autokorrelationsauswertung als Funktionsprinzip des Zentralnervensystems. Zeitschrift für Naturforschung, Teil B. 12:447--457.

  • Reichardt W (1961) Autocorrelation, a principle for the evaluation of sensory information by the central nervous system. In: Sensory Communication, Rosenblith WA, ed. pp 303--317. MIT Press, Cambridge, MA.

RD_2Gabor

The visual stimulus is processed by two linear Gabor filters (even and odd) that are in quadrature. The filters have a separable temporal profile (not shown) that consists of a biphasic temporal function built from the difference of two Maxwell distribution functions. The output from the even filter is delayed and the signals are then multiplied. The final output is scaled, half-wave rectified, and used to generate Poisson spikes.