alt Hacker News> Any tool that tries to enhance a low quality image or video is just going to be making up the missing data.
So there is some things that instinctively don't sound correct here.
A frame may not contain the info to enhance, maybe it's too blurry... but a series of frames can (I'm pretty sure) between them have enough info to deblur an object in the background, it really helps to know the focal length, and distance maps...
My only point is information in a video is more than the sum of the information of it's frames, it also captures delta, not just from frame to frame, but relevant frame to relevant frame. That's a fair bit to work off of.
I do agree with our general point when information is 'absent'. I disagree how much absent information is in a video which can't be reconstructed by this delta. It certainly isn't zero, or 100%.
Inventing colors from a grayscale is a good example of absent information and of where this goes awry. Deblurring/blurring operations, less so.
> but a series of frames can (I'm pretty sure) between them have enough info to deblur an object in the background
You're probably thinking of geometrical super-resolution, such as gigapixel photography. Blurring is the discarding of high-frequency information, and only a very very small part of this information can be recovered using techniques like this (as in, so little that you wouldn't be able to notice it).
> My only point is information in a video is more than the sum of the information of it's frames,
It's actually less than the sum of the information of it's frames. An off-the-shelf lossless compression algorithm can give you an upper bound for the amount of information present in a video file.