Lots of warehouse-type stores employ sliding doors, partly in an attempt to avoid heating up the outside atmosphere.
These sense the arrival of people (via simple movement detection) and then open completely to admit them -with the effect that a large amount of heat is transferred too.
Today’s invention is a set of sliding doors which can find the overall shape of arriving customers (including those pushing a trolley with a door slung across the top) using simple image processing.
The doors move so that the seam between them is located at the centre of the approaching objects.
The doors then open only widely enough to comfortably clear the edges of those entering (or exiting).
This could cut heat loss via these big doors by 50%.