Daguerre’s street was full; his plate kept it empty. Held open, a plate averages: the mean keeps a ghost of everyone who passed. Take the median instead, and a pixel keeps only what was there more than half the time: the street, the trees, and whoever stood still.
tap a walker on any plate to make them stand still, tap again to let them go · + − change the crowd · r lets everyone walk
opening the shutter…