Thread: Chroma Moire Removal Techniques and Solutions

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  1. #1 Chroma Moire Removal Techniques and Solutions 
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    Can you isolate only color noise in Resolve 9 or is it an all in one?

    After reading that thread where the guy saw moire in R9 but not LR4, I tried LR4 on a shot with moire in it and it the color noise reduction killed the minor amounts in hair that usually bug the crap out of me.

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    unless i'm clueless at resolve, which i might be, i believe the NR is just all in one. you can blend it back with the original image, but it's nothing like the color and luminance noise controls in ACR

    I think ACR does this spectacularly and have been really thrilled with the results when I toyed around with some of the raw stuff i shot. I'd love to see this control in a future version of resolve. maybe peter c will chime in on this, or someone with more experience dealing with NR in resolve.

    I've heard quite a few times that people just do their NR outside of resolve in things such as neat video or whatever, where you can separate color and luminance noise, and that they do their NR before or after the coloring session. this seems like a huge pain in the ass for most applications though
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    These are the NR controls in the full version of Resolve (ignore the YRGB values above):



    Granted it's node based so you can use all the usual qualifiers/power windows/etc to control where it happens but there doesn't seem to be anyway to do anything else that i know of. Admittedly, i still haven't even tried it since i've owned Neat Video Pro for over a year now.
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    How does Neatvideo do for the moire??? Did you try it out?

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  5. #5  
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    No i haven't - point me to the DNG frame you want me to test and i'll do it tonight for you.
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  6. #6  
    You might want to try PhotoNinja by Picure Code.

    http://www.picturecode.com/index.php

    It's an interesting and very high quality raw converter. You can change the debayer method to one that is more suited for cameras with weak AA filters. They also have Noise Ninja built in, which seems to be a great NR tool.

    I think it's just awesome that this camera uses an open raw format! Being able to use different programs to get different looks is great and I really do feel that each raw converter has it's own look. You can definitely get similar results from each of them, but there are also times when you get a certain look that just can't be recreated by another converter.

    Photo Ninja is definitely one to check out.

    I know processing footage through programs made for stills is a huge pain, but it's been fun for me just to see the variation you get from different methods.
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  7. #7  
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    Quote Originally Posted by Andrew View Post
    You might want to try PhotoNinja by Picure Code.

    http://www.picturecode.com/index.php

    It's an interesting and very high quality raw converter. You can change the debayer method to one that is more suited for cameras with weak AA filters. They also have Noise Ninja built in, which seems to be a great NR tool.

    I think it's just awesome that this camera uses an open raw format! Being able to use different programs to get different looks is great and I really do feel that each raw converter has it's own look. You can definitely get similar results from each of them, but there are also times when you get a certain look that just can't be recreated by another converter.

    Photo Ninja is definitely one to check out.

    I know processing footage through programs made for stills is a huge pain, but it's been fun for me just to see the variation you get from different methods.

    I finally got a chance to try this out with a DNG that had a fair amount of moire in it. The subject was a fine pattern (think jeans or backpack), the moire was pretty obvious.

    Lightroom, Resolve, and PhotoNinja all look the same to my eyes as far as debayering goes. But someone with a more analytical view on this should do comparisons.

    LR4's chroma noise reduction removed a fair amount of the chroma aliasing/moire but still left something to be desired.

    PhotoNinja, however, removed damned near one-hundred percent of the chroma aliasing/moire and I sincerely cannot tell if it's impacting overall detail. Like, there's no moire whatsoever. Unfortunately, I can't export the actual DNG or a full res JPEG because I do not have a license, but here are screenshots from PhotoNinja, before and after. his was "test" footage from last November so Moire COULD be improved in the new firmware, I don't know how that would work but:

    Before PhotoNinja, DNG straight out of camera, 28/1.8 Canon I think:


    After PhotoNinja Noise Ninja Reduction, Chroma all the way to the right, detail slider at 0:


    Click either photo for a larger PNG screenshot and judge for yourself.

    I can also send this DNG for someone to try chroma reduction in Resolve. If Resolve 9 can do this just with chroma noise reduction* then I think my final issue with this camera is ... well... resolved.




    *I understand that this is not a moving set of images, and that may also have an effect on how it works in Resolve 9. I would rather do everything in Resolve, to be honest, as the other software do not export DPX or similar. =[

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  8. #8  
    Senior Member CaptainHook's Avatar
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    Quote Originally Posted by Kholi View Post
    I can also send this DNG for someone to try chroma reduction in Resolve. If Resolve 9 can do this just with chroma noise reduction* then I think my final issue with this camera is ... well... resolved.
    Send it through to me and i will try the NR in Resolve and in Neat Video.
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  9. #9  
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    Quote Originally Posted by CaptainHook View Post
    Send it through to me and i will try the NR in Resolve and in Neat Video.
    Seenntttt.

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  10. #10  
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    Quote Originally Posted by Andrew View Post
    You might want to try PhotoNinja by Picure Code.

    http://www.picturecode.com/index.php

    It's an interesting and very high quality raw converter. You can change the debayer method to one that is more suited for cameras with weak AA filters. They also have Noise Ninja built in, which seems to be a great NR tool.

    I think it's just awesome that this camera uses an open raw format! Being able to use different programs to get different looks is great and I really do feel that each raw converter has it's own look. You can definitely get similar results from each of them, but there are also times when you get a certain look that just can't be recreated by another converter.

    Photo Ninja is definitely one to check out.

    I know processing footage through programs made for stills is a huge pain, but it's been fun for me just to see the variation you get from different methods.
    =[ First page of the thread, man. Demo link right there, from Andrew.

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