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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 :)

The red elephant in the room.

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Sooo we all know about noise issues as much as we don't like to think about it. I know we want this camera to be the best it can be and that's why I started this thread. I'm not a post guy so I'll defer to those who know more. I want to know what kind of noise reduction options are out there and what people have found to work best with Red's "special" fixed pattern noise. As a DP I'd love to know that I can get that extra stop of low light latitude because I can clean up the noise that starts creeping in. Any suggestions?
 
I had one shot in this job I just did, where at the end of the night we moved to 75 frames (so 2k, natch). I had forgotten we had been "working" at 1000ASA all night, so the resulting 2K shot was very noisy.

I had seen the rough edit enough that I had just resigned myself to never making that mistake again, when I realized I had screwed up and not actually used the noise reduction feature in Red Cine.

Anyway, the shot cleaned up considerably (at a cost of resolution), but considering I had a few more pixels than I needed in the first place...it's pretty good. Lesson learned, can't push ASA nearly as much in 2K mode.
 
Output TIFF stacks and batch them through Noise Ninja? (Might do DPX as well, I forget).

EDIT: Nate - got any before and afters of that?
 
The Foundry have pretty good de-graining/de-noising tools that might work. One problem is that you can't push that sort of thing very far before you start introducing other artifacts. (In my experience.)

I think the biggest issue is the compression artifacts that the noise causes. Hopefully, Red will continue to introduce additional user-selectable compression levels. (If not 100% uncompressed, now that that option seems to be dead.) Straight-up noise is easier to deal with (and less objectionable, imho) than blotchy compression artifacts.
 
We use the DVNR suite from Digital Vision. The problem isn't per se with the noise that can be removed. Its the compression on top of the noise that makes it look globby, we're scheduled to run another set of tests with redcode 36 in high noise situations to see if it improves...but otherwise, we're looking forward hopefully to the uncompressed option.
 
I could, but I'm too lazy. Suffice to say that from what I can tell the noise reduction in RedCine is better than what I'm used to seeing in Color, or noise reduction plugs common to FCP. I would guess this is because the noise reduction is intrinsic to the debayering process, therefore can be more effective than plug-ins.

I would imagine it's worse than what's available for something like a Discreet product.
 
NateWeaver said:
I could, but I'm too lazy. Suffice to say that from what I can tell the noise reduction in RedCine is better than what I'm used to seeing in Color, or noise reduction plugs common to FCP. I would guess this is because the noise reduction is intrinsic to the debayering process, therefore can be more effective than plug-ins.

I would imagine it's worse than what's available for something like a Discreet product.
Click to expand...

I was told the noise reduce in Scratch and REDcine do happen during the debayer step, so the image should be cleaner using this than with any post processing application... should be. I have not tested it though.

On a commercial we are working on, the files were rendered before scratch introduced the noise reduce. There were a number of night shots that were too noisy, so we reprocessed those with the new software and the NR setting. I have not heard back from the client yet, so I do not know if the NR shots are better or not. I'll let ya'll know what I know when I know it.
 
The very best I've used is neatvideo. It gets rid of noise, compression artifacts (you need macroblock artifacts in the area to profile for this to work, but it does :-O) and just about anything I can think of. It takes a bit of tinkering with very bad shots, but it works. I've denoised night skies and it preserves stars while getting rid of noise. Magic! It's an amazing piece of software, and cheap too :)

PS. If you post a sample, I'll denoise it for you so you can see how well it does it.
 
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I could do that cholo. What format do you want it it?
 
Quicktime works ok.

(The bug avatar is not mine originally. I saw it in another forums and thought I'd use it until I found something else. It works best on white forums. It makes you think a bug is really crawling on your screen and fill it with finger smudges trying to kill it)
 
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