A free 1D convolution / deconvolution tool that runs entirely in your browser — a teaching demonstrator for convolution, and a ground-truth verification instrument for calcium imaging.
The flagship use: load a paired recording — ground-truth spike times plus a measured calcium trace (dF/F₀) — and recover the calcium-indicator kernel that relates them, by three parallel methods read against an independent spike-triggered average. The scientifically important output is not just the kernel: it is an honest answer to whether a clean kernel exists at all. Spike–calcium decoupling is a finding the tool measures, not an error. Recovery runs against every trace column, so a kernel appearing in a non-targeted ROI is surfaced rather than missed.
Everything is computed client-side: no backend, no uploads, no third-party requests, and a strict Content-Security-Policy that forbids network egress. Unpublished data never leaves your machine.
Methods & Mathematical Reference — the mathematics, algorithms, and interpretation rules, as a citable standalone page.
By the same author: No Peak — the CLUSTER pulse-detection algorithm (Veldhuis–Johnson) for hormone pulsatility, as a client-side web app with the same data-never-leaves-your-machine posture.
The interactive tool requires JavaScript and loads in place of this summary.