Colorizing Images and Video by Scribbling
Guspaz writes "Up until now, colorizing a video or image has been a painstaking and mostly manual task. However, researchers in Israel have come up with a new way of colorizing images just by making a few scribbles. The technique works on the premise that 'neighboring pixels in space-time that have similar intensities should have similar colors,' and also allows colorization of videos by 'marking' about one in ten frames."
Video Compression !
Only save the intensity channel and a few bits of markup and you compress the stream quite a bit.
The bikini - security through obscurity since 1943