Kevin Ferguson examined color usage in Western films from various angles. One of those was the sum image using the movie frames every ten seconds.
These shapes and colors are evocative in a way that tea leaves and tarot are: they don’t actually tell you much about what you’re looking at, but they allow you an emotional response confirmed or denied once you come to discover what the image “really” is.
The methods themselves you’ve seen before, but probably not used in this way.
