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Noise Reduction Workflow / Recipe

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Matthew Jeschke
Noise Reduction Workflow / Recipe
on Aug 24, 2019 at 6:43:53 pm

My drones have a fair bit of noise issues and I've started de-noising them as of late. I'm not sure when is best to process the denoise in filter stack.

Currently I'm de-noising the original footage first. However, classes I took on Photoshop which always did the noise reduction last. I know Photoshop isn't Vegas but for that reason I'm curious which way do you do noise reduction and why?

If you do noise reduction last, do you process the unfiltered (original) clip?
Additionally, would you sharpen before or after the denoise?

I'm doing some tinkering and think I've arrived at what I like best, but not sure if it's necessarily best way to do it.

Currently trying this with Noise Reduction First:


Curious if is better practice with noise reduction last:


--------------------------------------

I do Architectural Photograph & Cinematography as a part of being a Residential Real Estate Consultant.

Some of my work can be seen at,
http://www.youtube.com/keystoaz/
http://www.vimeo.com/matthewjeschke/
http://www.keystoaz.com/

PS. It's an excellent excuse to ride off what I love, Camera equipment :)


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Graham Bernard
Re: Noise Reduction Workflow / Recipe
on Aug 25, 2019 at 5:10:42 am
Last Edited By Graham Bernard on Aug 25, 2019 at 5:22:30 am

[Matthew Jeschke] "I know Photoshop isn't Vegas but for that reason I'm curious which way do you do noise reduction and why?"
Hi Matthew! I don’t add any active NoiseRedux in any Chain. You are correct, PS and VP are different: A Photo is Static. It deals with “set” Space or Spacial space. Video moves from frame to frame in time or Temporal space. I’ve understood Video Noise Reduction can deal with both. Frames “Spatial” static and frames moving “Temporal”. How would we be able to be certain and then have a colour correction that deals with a static snapshot or Sharpen again dealing with a Spacial space? It’s complex.

So, what do I do? I do correct Noise, but first and nothing else active - done. I also use steadying software prior to Noise Redux - done. Then I can be assured that I’ve got it ready, as good as it can be, and then do Colour stuff or Sharpen or any other FX that’s not Temporal. It’s complex. So for me I uncheck everything that’s NOT NoiseRedux.

An observation I’ve just made: Why are you using Sharpen?

If I can use the analogy of Audio repair. I use Noise redux prior to any SFXs.

As to understanding Spatial and Temporal Noise redux I did a quick GoogleDoodle and got back this “paper”:

https://www.hindawi.com/journals/ddns/2015/351763/

Enjoy?!



* Grazie

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Matthew Jeschke
Re: Noise Reduction Workflow / Recipe
on Aug 26, 2019 at 6:01:35 am

Thanks for the help ☺Some shots I have to shoot flat, eg. log profile (depending of light conditions). My cameras have modes with the sole intention of doing this, adding sharpening in post and not in camera. However, my drones create some very difficult to work with footage. Sometimes it is both soft and noisy.

Mavic Pro has many known issues in this regard. Additionally, my Phantom 4 Pro. However, the P4P is a bit better when switched to h.265. If you have a good eye you'll spot the issues in videos online. There's frame flicker (luminace in some frames are higher than others), and lots of digital artifacts in the shadows.

I seldom use any in camera sharpening. I always do it in post. But only the drone shots really require any noise reduction. NLE noise reduction is temporal as well if that's how you describe it. It does factor in some frame filtering, so I can get rid of issues like my frame flicker. However, I'm not sure that effects sharpening, I think sharpening is frame by frame or I assume so.

This is a video I just made since getting noise reduction software for Mavic issues. I didn't do any sharpening. Partly because overloaded rendering process and didn't preview the same as it rendered for some reason. Noise reduction was only done on drone clips. Those clips were also shot in log profile.



--------------------------------------

I do Architectural Photograph & Cinematography as a part of being a Residential Real Estate Consultant.

Some of my work can be seen at,
http://www.youtube.com/keystoaz/
http://www.vimeo.com/matthewjeschke/
http://www.keystoaz.com/

PS. It's an excellent excuse to ride off what I love, Camera equipment :)


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