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creating tracking markers where there are none
I got this fairly well-lit greenscreen that needs tracking. Problem is, there are no markers. I was thinking of going into colour corrections and maybe, just maybe, I can bring something out of that screen. I dunno, a coffee stain in the upper right corner, for example, would be great.
Any ideas on what knobs I should fiddle with to bring out the existing subtleties? I’m not looking to add. I’m looking to find. A colourist I ain’t. DVCPRO50.
Thanks – S.
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5 Replies
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look at the indiviual color channels to see if there is anything there… a levels may help at the same time to increase the contrast.
whats the rest of the shot look like. what do you need to track it for? (sometimes its easier to find a solution by knowing the end result vs a possible way there)
who is that masked man…
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There’s actually quite a bit of this kind of footage. I gotta deal with it. It’s all in the same greenscreen studio. The red channel seems to be yielding a few secrets. Problem is, whenever I raise a level or two, the noise goes up along with it. So I’m playing with a few combinations, less blue here, more “denoise” there, trying not to get too lost. Thanks for pointing out the channels. That is a great way to find things.
The shots vary, pans, dolly, wide, close-ups, etc. All kinds of wonderful issues. And no markers. Except for one I found. Candy. I’m saving it for last.
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You may already be well aware of this, but in this scenario it sounds like you would benefit mightily from 3-4 different instances of your source footage:
1) Source footage color corrected to find any potential anomalies in the screen for tracking
2) Source footage color corrected to bring out the green screen, use this layer to pull the matte (color correction/channel operations are optional, but can help in pulling a key)
3) Potentially another source layer to pull an edge matte (if you’re having trouble defining your edges).
4) Your unmodified source footage to apply the tracking data and mattes pulled from the above layers.Good luck!
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Good thinking. It had not occured to me. Not at this hour. I’m going to play around with this.
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if you want to just track on one channel you can precomp your footage and set it to that channel only.
noise is your enemy so you dont want to push the footage to far.
careful with removing noise as well as too much will affect your track as well.
anyway to track part of the foreground images (you dont mention what th shot is so….)
who is that masked man…
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