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Possible to select only moving pixels?

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Adriano Castaldini
Possible to select only moving pixels?
on Mar 12, 2017 at 12:27:06 am

Hi everyone,

I'd like to grade separately the subject and the background. Let's say that the background is still and the subject is moving, it should be easy to select the subject-only if there were a tool for selecting only the moving pixels (or only the still pixels). Do you know if there is something similar in Davinci Resolve?

Thanks for your help.


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Toby Tomkins
Re: Possible to select only moving pixels?
on Mar 12, 2017 at 10:54:25 am

The only way I can think of is to;

Copy the clip to v2. Go to blending mode, select difference for blending mode, apply noise reduction and tweak gain, turn B&W, export that clip as something high quality like prores4444. Delete copy of clip on v2. Use that clip as an external matte to drive a correction node on v1. You will probably have to tweak the matter to get desired results, maybe with blur etc. Good luck.


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Adriano Castaldini
Re: Possible to select only moving pixels?
on Mar 12, 2017 at 3:36:47 pm

Wow... Smart solution! Thanks so much Mr. Tomkins


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Toby Tomkins
Re: Possible to select only moving pixels?
on Mar 14, 2017 at 9:09:54 am

No worries. It was an interesting question.


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