[db48x]

Rescanning the film is quite different from upscaling. Film is a lot of tiny silver grains embedded in a transparent plastic medium. Each tiny grain is photosensitive. Once you get through the whole process of exposure, developing, fixing, etc, etc then each grain of silver becomes a tiny dot of light on a projection screen. Not a rectangle or a square, but an irregular blob of colored light amongst a sea of irregular blobs of colored light. When we scan the film to make a digital video we sample those blobs and turn them into rectangular pixels, losing some of the information that was present in the film. Upscaling the video doesn’t recreate the lost information, but rescanning the film at a higher resolution can absolutely capture more of the information from the film.