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Exponential feature examples for the same word as in Figure 4. The time window length for time binning in (A) is 5 ms and the number of events in a single frame for event binning in (B) is 25. One main difference between the spike count features and the exponential features is that the exponential feature values are in the range between 0 and 1, while the spike count feature values depend on the volume of the spikes in the time window.
