Fixed pattern noise

[Warren Eagles]

This is probably more of a general post but has anybody got any good tricks for fixed pattern noise on early Red One footage. Lots of panning shots....errrkkkk

 

[Robert Ruffo New]

Use "Exposure" rather than just Flut to gain under-X shots sometimes helps, as does aggressive use of Red's built in SDK noise reduction.

I've found that Neat video also helps, even with this, as long as you have a good patch of even surface to "train" it with.

This usually occurs when crew did not black-shade properly, and then underlit non-Mx footage.

 

[ericyoung]

If you're lucky, at some point you shot some really dark (if not black) frames in amongst all your footage. You could potentially average out a second or two of frames in Photoshop or AfterEffects to remove random non-fixed pattern noise, then subtract the resultant dark frame with fixed pattern noise from your affected footage using layer blending modes in After Effects or similar compositing application.

You'll have to adjust the opacity of dark frame to minimise the pattern in your footage.

Then use Neatvideo or other temporal denoising filter if necessary to further reduce it.

[Edit] In theory, the fixed pattern noise of a particular camera doesn't change that much over it's lifetime, although it is obviously dependent on sensor temperature. If you have access to the actual camera used, you could deliberately black calibrate when cold (with fans manually set to full blast), then set a lower fanspeed and let it warm up to a working temperature similar to when the footage was shot, cap the body up, and record some black clips with hopefully some fixed pattern noise that's representative of the camera.