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. 2015 Nov 16;9:437. doi: 10.3389/fnins.2015.00437

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Copyright © 2015 Orchard, Jayawant, Cohen and Thakor.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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A Fourier analysis of the MNIST-DVS dataset showing the amplitude of different temporal frequencies in the recordings. The 0 Hz component has been removed, and the energy in the signal has been normalized to 1 by dividing by the l₂ norm. Clear peaks are observed at low frequencies due to the slowly varying motion of the digits on the monitor. A significant peak is observed at 75 Hz due to the discontinuous motion presented to the sensor as a result of the 75 Hz monitor refresh rate.