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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

RED Scarlet X. Neat Video Noise Reduction Test ISO 6400

Brandon J.F.

Brandon J.F.

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HD Video (Set to 1080p): http://youtu.be/YeJROp59U6Q?hd=1

This was a quick shot I made while on a break. Very little available light. 360° shutter.

ISO 6400 with Neat Video NR, without NR and ISO 800 no NR.

AvsxgXaCQAEbRja.jpg:large


Avs1zoDCQAAGdeq.jpg:large


Avs3YRfCIAA2V0-.jpg:large
 
I have to be honest if you had a bit of silver bounce... I think the 800 would look more natural and pleasing... but nice to know us NEAT users can clean up the 6400 if we ever are in a tight spot. Thanks for the test
 
I was surprised how good the results were. I did not use the automatic profile. I spent around 30 to 40 minutes perfecting the noise profile until I got the quality level to 96%. I pushed it to 6400 just to see how much I could push it. It's more than I would otherwise. What is interesting is that in my tests I found that it's easier to get a high quality denoise if you push the ISO further.

Below is a good tutorial for learning how to use the Neat Video.



There are test targets that are available to shoot and help perfect the noise profile. You can download them here:

http://www.neatimage.com/testtarget.html

Example:

NICalibrationTarget1024color.png
 
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Ryan Hamblin said:
I have to be honest if you had a bit of silver bounce... I think the 800 would look more natural and pleasing... but nice to know us NEAT users can clean up the 6400 if we ever are in a tight spot. Thanks for the test
Click to expand...

I pushed it to an extreme just to see how far it can be pushed. I'm definitely not saying 6400 is what I would use for this shot. It's too much. This is just a test :)
 
I've used Neat Video for a long time, but that tutorial had lots of great info that will help me get even more out of this great plugin. Highly recommend both the tutorial and the plugin!

Thanks for posting the tutorial! I'll also start using those test patterns when we know we'll be shooting in low light.
 
So I had an idea. As I mentioned it is easier to get a high quality denoise if you raise the ISO higher because you can get better device noise samples. The problem is the ISO 6400 footage didn't look very realistic. I decided to take the rendered ISO 6400 video file and do a quick and dirty regrade in Premiere to darken it down and make it more realistic. Below are the results.

Avx7WXuCMAAt9rI.jpg:large


Certainly better results would come from using a better color correction program like Resolve. This was just to try out an idea.

It seems to me that you get better results outputting at a high ISO (e.g. 6400) without grading and then grading the resulting file (dpx, openexr, prores, whatever...) than you would if you tried to denoise at a lower ISO (e.g. 1600). Anyone with more experience care to comment? I don't claim to be an expert with this. Just my observations from some quick tests with Neat Video.
 
Brandon,

Great test...keep it coming...

-P
 
its nice to know this can be done at 6400, but truly the iso 800 had the best results. If you add one stop in post, mask and track only the girl, you could use a layered noise sampling algorithm to keep the black from ghosting by reducing the noise, de-saturating the the yellow from the girls face, find the color channel with the noise in the girls face, which in this case is in the blue channel, reducing that nose and having a more organic feel to it all. my 2 cents
 
shashbugu said:
its nice to know this can be done at 6400, but truly the iso 800 had the best results. If you add one stop in post, mask and track only the girl, you could use a layered noise sampling algorithm to keep the black from ghosting by reducing the noise, de-saturating the the yellow from the girls face, find the color channel with the noise in the girls face, which in this case is in the blue channel, reducing that nose and having a more organic feel to it all. my 2 cents
Click to expand...

Thanks for the feedback. What would you use to do this? Know of anywhere online I can read more about how to do this?

I agree the denoised footage has a less organic feel to it. I still think my favorite of the 4 looks is the 4th one that I uploaded today. I'd love to what the results of your workflow would look like though.

I can upload an R3D snapshot of this if anyone wants to play with the shot. Anyone know where I can upload it so everyone can download it for free?
 
Brandon J.F. said:
Thanks for the feedback. What would you use to do this? Know of anywhere online I can read more about how to do this?

I agree the denoised footage has a less organic feel to it. I still think my favorite of the 4 looks is the 4th one that I uploaded today. I'd love to what the results of your workflow would look like though.

I can upload an R3D snapshot of this if anyone wants to play with the shot. Anyone know where I can upload it so everyone can download it for free?
Click to expand...

you can use www.wetransfer.com to upload the file. Enter your own email address in the send to field. You'll recieve a hyperlink which you can paste here. I believe they support up to 2GB per transfer and they'll keep the link live for 15 days.

cheers
Sid
 
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Brandon J.F. said:
I think so Jarek.
Click to expand...

Ugh...was hoping that wouldn't be the case. While I'd primarily use it in my editor, would be nice to have it in AE for my FX shots.
 
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