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Looking for a stronger blur

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Pepijn Klijs
Looking for a stronger blur
on Oct 20, 2012 at 6:30:17 pm

I got a project where I have to blur some inmates in a prison. So far I'm tracking there faces with a window that has a blur on it. But I'm kind of reaching the limit as of how intense the blur in Davinci is. I even tried to multiply the blur by copying the nodes, but after 4 extra nodes there isn't much blur added to the picture and I reach the end of how far I can go, which is, in some close ups still not enough.

Does anyone have soem good advice for me? Maybe a different approach? Or maybe I'm overlooking some settings that will allow the blur to go further?

Thanks!

Editor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl


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Sascha Haber
Re: Looking for a stronger blur
on Oct 20, 2012 at 7:18:22 pm

I second this...

A slice of color...

Resolve 9.01 OSX 10.8.2

Colorist / Aerial footage nerd
http://vimeo.com/saschahaber


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Alan Gordon
Re: Looking for a stronger blur
on Oct 20, 2012 at 10:01:00 pm

Third. Also more blur for keys.


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Barrie Williams
Re: Looking for a stronger blur
on Oct 20, 2012 at 10:59:40 pm

+1

the tracking is so good that it can easily do this face blur stuff... but it needs to have a higher maximum.

Barrie


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Pepijn Klijs
Re: Looking for a stronger blur
on Oct 21, 2012 at 3:01:23 pm

Wow, so I'm not the only one.

It's really frustrating especially because the tracker in Resolve is soooo damn good compared to other choices (after effects, scratch) that it's hard to spent my Sunday doing it manually, frame by frame, while I already had all my windows tracked well in Resolve.

I really don't understand WHY the blurring is so weak. In combination with the tracker it is the ultimate tool for blurring license plates, faces etc.

By the way, I found a work around that doesn't work for me on this particular project cause it's a flattened quicktime, but in other cases you could do the following.

1. Grade the project if needed
2. Export the shots that need blurring.
3. Blur the whole frame in After Effects or whatever you want, render them out.
4. add those renders 'as mattes' to the according shots in the media pool in Resolve.
5. Use Juan Salvo's (Thanks!) method for creating an external fill as described here:
6. throw up the window, do your tracking etc.
7. Done

Now this might seem tedious, correction, it f.... is, but the most time can be won by tracking in Resolve, plus it also looks better and is less annoying when properly tracked.

Hope this helped!

Editor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl


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Sascha Haber
Re: Looking for a stronger blur
on Oct 21, 2012 at 3:35:24 pm

Before I turn to AE i rather do it in Scratch where I can get a 100 times bigger blur.
Scratch had the same problem 3 years ago and they said its an OpenGl thing back then.
The hardware algorithm only allow for that much blur, if we want more, it has to be done by the CPU aka not RT anymore.
But still, I need more and bigger blurs.
Not only for keys, also for overlays like you pointed out.

A slice of color...

Resolve 9.01 OSX 10.8.2

Colorist / Aerial footage nerd
http://vimeo.com/saschahaber


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Dan Moran
Re: Looking for a stronger blur
on Oct 21, 2012 at 9:46:51 pm

How about using a layer mixer in this lay out?



serial w/blur -> serial w/blur -> serial w/blur ->layer mixer
clean image->

not a great diagram but it should show the best way for you to blur the image 3 times, then track the clean image and use a window and track the face to reveal down to the heavily blur inside the window only.

Should save you a little time.

D

--

Dan Moran
Colourist
Smoke & Mirrors: London
http://www.danmorancolor.com/blog


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Pepijn Klijs
Re: Looking for a stronger blur
on Oct 23, 2012 at 6:49:30 am

@dan Nice diagram but blurring the image 3 times is simply not strong enough for the purpose of making someone unrecognizable.

Editor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl


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Dan Moran
Re: Looking for a stronger blur
on Oct 23, 2012 at 8:26:00 am

Add more then! 7 blurs should do it ;)

--

Dan Moran
Colourist
Smoke & Mirrors: London
http://www.danmorancolor.com/blog


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Pepijn Klijs
Re: Looking for a stronger blur
on Oct 23, 2012 at 8:36:19 am

After 4 nodes of blur adding more blur doesnt make any difference, try it!

Editor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl


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Ricardo Duarte
Re: Looking for a stronger blur
on Jan 21, 2013 at 12:16:18 pm

true,

+ blur intensity
+ blur paterns, ex. mosaic, etc.

resolve 9 is great but these would come in handy!


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