The technique you refer it is "inpainting", but such sophistication isn't necessary. If the object of interest is moving across a largely static background (pa

The technique you refer it is "inpainting", but such sophistication isn't necessary. If the object of interest is moving across a largely static background (pans and rotations are easily compensated for), then the missing background image you need in frame N is available in adjacent frames. I've used such a filter to remove dirt and dust from 8mm films via avisynth, a program that goes back more than 20 years, though the filter in question is not quite that old -- at least 10 years. Here is the filter in question: http://avisynth.nl/index.php/RemoveDirt http://avisynth.nl/index.php/RemoveDirt