How do I do Hollywood resampling ?
category: general [glöplog]
I've been playing with this stuff a little. Doing a quick test, it's possible to reconstruct a high res source image from a bunch of undersampled images very successfully. I reckon reconstructing those pixellated / blurred interviews is definitely possible so long as the camera is moving.
My test case was roughly this:
- Take a 1024x1024 source image (this)
- Scroll it around to simulate camera movement
- Resample it at 128x128 (this is my low res source). Scaled back to 1024x1024 it looks like this.
- Correct the image translation and render only the points at the centre of each source pixel (like polka dots..). This gets rendered into an 32 bit float accumulator with additive blend, so the image builds up as more frames are added.
- Crank the handle, a short while later the result comes out like this.
It's primitive, but it shows it does at least work.. now for some refinement :)
My test case was roughly this:
- Take a 1024x1024 source image (this)
- Scroll it around to simulate camera movement
- Resample it at 128x128 (this is my low res source). Scaled back to 1024x1024 it looks like this.
- Correct the image translation and render only the points at the centre of each source pixel (like polka dots..). This gets rendered into an 32 bit float accumulator with additive blend, so the image builds up as more frames are added.
- Crank the handle, a short while later the result comes out like this.
It's primitive, but it shows it does at least work.. now for some refinement :)
