The premise is simple, but Flowing Data describes it best -
Choice of color in a movie can say a lot about what’s going on in a scene. It sets the mood, changes the tone, indicates a change in point of view, so on and so forth, which is why moviebarcode is so fun to click through. The concept is simple. Take every frame in a movie and compress it into a sliver, and put them next to each other. Voilá. Movie barcode.
Seriously, as a film lover this site is a veritable treasure trove of thematic insight. Plucking a few favourites from the extensive site index, you can really see how this works both as art and as a window into how directors use shade and colour to help bring their overall vision to life.
If you’re as enamoured as I am with these images then you’ll be pleased to know that prints are available and, if the film you’re looking isn’t available, Mr Reid has published a handy ‘how to’ guide too.