Fig. 4.
Spike detection for cell 2002 of the
Chen et al. (2013)
data. The observed fluorescence (
) and true spikes (
) are displayed. Estimated spike times from the ℓ0
problem (4) are shown in (
), estimated spike times from the ℓ1
problem (3) are shown in (
), and estimated spike times from the post-thresholding estimator (9) are shown in (
). Times 0s–35s are shown in the top row; the second row zooms into time 30s–40s in order to illustrate the behavior around a large increase in calcium concentration.