how to reduce noise in an image

General TouchDesigner Discussion
1

I am trying to work out a way to denoise a video image. I had thought to build a highpass filter and subtract the results from the noisy image. I thought I could make a highpass filter with a convolve, but I think I may not know what I am talking about… I am thinking a FFT might be involved, maybe there is a way in GLSL
Grateful for any insights
MD

*edit - I just learned myself all bout the Median FIlter, I am going to try this one:
graphics.cs.williams.edu/papers/ … median.pix

2

There is actually a denoiser sample that comes with the CUDA SDK, using some pretty complicated algorithms. I ported the code to work as a CUDA .dll in Touch a long time ago.

It’s possible this code no longer works (havn’t tested it in over a year) but it may be a good starting point.
denoise.zip (319 KB)

3

Awesome. Thanks Malcolm, I’ll report back with results
MD

4

Matt,

Did you ever figure this out?
Were you able to get the dll to compile?

Thanks,
-c

5

If anyone got this to compile I am very interested :slight_smile: