Weird Banding with Noise Reduction Filter

Working on a night shot of a building and processed through ACR7.2 and forgot to reduce the noise - and opened in Photoshop. Went to Filter/Reduce Noise and immediately get wierd banding in the window blinds. This banding is there regardless of the noise reduction settings and could not get it to go away - See attached screen shot of before and after applying the filter. So I went back and opened the file again in ACR7.2 and applied the Noise Reduction there and bingo, noise level dropped and looked good with no banding. Looks like the Noise Reduction capabilities in ACR7.2 are way better than the Noise Reduction filter - but surely the banding should not be there; especially if images do not get processed through Camera RAW.
Running latest version of Photoshop CS6 (latest patches applied), Windows 7 x64 16GB RAM, Intel 4000 with latest drivers installed. Camera file was ACR2 from Canon 5DMKII imported as a DNG file - then opened in ACR 7.2
Before Image Opened in Photoshop before applying the Noise Reduction Filter
After Image in Photoshop after applying the Noise Redcution Filter
Seems like a bug to me
By the way, the screen captures are from the image viewed at 100%
Mike

The aliasing effect you're showing is obvious, but are you saying the noise reduction operation also changed the color of the image?
I didn't think so. Your "before" image appears several steps removed from your "after" image.
It would be best if you'd capture a "before" image of your entire display just before and just after applying the filter that causes the aliasing pattern, and also specifically describe or screenshot the exact parameters being provided to the filter causing the problem as well.
In general, if you're getting aliasing introduced into high detail / high frequency parts of your images, you might find it advantageous to work at a higher pixel count - i.e., change the output size in Camera Raw so that you're opening images at an upsampled resolution. That's the only way I work, and I find it advantageous to have more pixels representing the image while editing in a lot of ways.
-Noel

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http://vimeo.com/7340608

No, there are no built-in noise reduction filters.
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Adobe Staff and Forum Members,
Would somebody please explain how changes in the noise reduction filter change video quality. It seems the standard setting is 30% and I don't have a manual with the trial version to understand what changes to make on order to best transcode older video. I'm waiting for my hard copy of Encore 2.0 now but in the mean time any information would be greatly appreciated. Have a great day!
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> How much time does a change in the noise reduction filter have on transcoding time?
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All of the software that works with this does this... soften the picture.
The controls are precise however, and I've used it with really low light footage to advantage.
Denoise is a video noise reduction filter plugin for FCP google it... render is awfully slooooooo. Color renders faster. free download of demo with big red x thru all footage I think. Lots more controls.
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Will do... email me at [email protected] and give me your email (Soon as I'm going to kill that one... too much spam). I'll let you know. This is a huge project of remastering 17 hrs of Aurora footage... time laspse, color, levels... the whole works. May be months before I'm done.
Also... I just checked out their website. WOW...!!! Is it really that good? I'll be in heaven.
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I have found a serious bug in the RAW conversion when noise reduction is applied. When converting from two types of Canon RAW files (a CRW from a Powershot G6 and a CR2 from a 20d) I found that if you apply Noise Reduction to a RAW file on very low settings (the default setting in the NR function will produce this reliably) single-pixel lines appear at regular intervals throughout the image. Here is an example:
You can see several lines in this image:
http://farm1.static.flickr.com/140/3821480263171e76604b.jpg
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http://farm1.static.flickr.com/179/382148021af6586d27eo.jpg
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In manual it said that if you have noisy video and want to lower the size then you can use this filter. It also blur the video a bit. But I suspect it is more than blur as I try gaussian blur in time line and the result is not as good. You can see the result as well. There is the tab between source and target and you can compare the result by togling between source and target tab.
BTW, anyone with 1 core, dual, or quad core, can you tried to encode with it? Just cancel it after few minutes as I want to see what is your processor utilization with this filter on. Also you can see how long does it take to process this video from the 'estimation time left'.

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Hello people,
have a problem with the microfon sound.
This recording is either noisy (without HD driver and with HD drivers without noise reduction) or it is distorted (with HD drivers and noise reduction).
Drivers I've tried from the Lenovo page and also from Realtek already.
here are a few tests
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distortion: https://dl.dropbox.com/u/1182020/test% 20with% 20HD% 20treiber% 20with% 20rauschunterdr% C3% BCckung.wma
in the device manager for microphone stands for the version: 6.2.9200.16384 Microsoft.
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greeting

Dark areas have less bits to encode their values so a single bit of noise is a higher proportion of the total value.
For the basis of the default processing, to match the human eye’s response to dark and light, darker areas are brightened more than bright areas, using a non-linear gamma curve. This magnifies the noise in darker areas.
If you boost the brightness of dark areas using Shadows or Clarity, you are making that noise even more visible. Think of brightening as digitally increasing the ISO.
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Exporting sharpening will sharpen any remaining noise.
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Hello,
sorry for my english but i'm writing from france...
So, this is my problem. If you want, try the same thing and you will see something ugly :
this is an example (not real files that i'm working on) :
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http://perso.wanadoo.fr/elzef/motion.jpg
I hope you understand what i mean...
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Hi Patrick,
thank you,
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at the begining it's seems to be OK,
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I try to set layer2 alpha to "behind". It seems to work with the soft edge but don't work with the hard edge.
I will try again with the images of my real project and try to not use hard edge, maybe it's gonna work.
Thank you very much
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MAC 10.9.4
3.5 Ghz 6-core
16GB ram
AUDITION CC
PREMIERE CC 2014
This is happening over and over to me, along multiple projects and multiple clips.
I apply Adaptive Noise Reduction, and tweak the properties. It sounds great but then when I 'apply', the filter is only applied to about 50% of the clip.....meaning it sounds great when tweaking the filter, but after when it is actually applied, only parts of it will apply.
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Note:
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Weird Banding with Noise Reduction Filter

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