Out Of Focus Greenscreen Edges?

[Laserschwert]

Could you post an uncompressed PNG of the shot? having it JPEG compressed makes it even more difficult than with HDV's MPEG2-compression alone...

[Mylenium]

Primatte or Ultimatte. They're the only ones who really handle transparencies/ extremely blurred areas due to how they work under the hood. I would think that Autodesk's diamond keyers/ 3D keyers in combustion*, flame* etc. also would work.

Mylenium

[thundering1]

Tell ya what - when I have it up, I'll put a link to my site where you can download the full-size PNG. The files size is too big for CGTal to upload, so it wouldn't let me.

-Lew

[mackdadd]

Keylight can handle that, it does take some work though. I'm not sure what evening I might be able to get to it, but maybe I'll screenrecord a stab at it for you.

[thundering1]

Sweet! Thank you very much!
I haven't had time today to upload the image - it should be up by tonight and I'll post the link.
-Lew

[thundering1]

http://www.lfragaphoto.com/feeders/

Here you go - right-click and Save As.

Again - thanks a LOT for this-
-Lew

[mackdadd]

Ok, this is what I got with 5 minutes of dabbling around and using ONLY one layer and Keylight.

http://www.mackdadd.com/CG/CGTalk/hype_screencap_01.jpg


Now might be a good time to mention that almost NO professional greenscreen is ever done with just one layer being keyed. On every movie I've ever worked, there are layers of rotoscoping, holdout mattes, different keys for different color edges, stuff like that. If I was doing this for an actual movie, I would garbage roto the greenscreen area so the the rest remained completely untouched while I worked on the green area. I would also garbage roto his skin so I could pull a separate key for that, while a different key would handle the jacket and car edges. And I would definitely put all the keyed elements together before applying an overall green spill color correction, which I would do with a hue/saturation effect for complete control. Rarely do I trust the auto color correction in whatever keyer I am using.

Anyway, for the sake of showing it could be done, I did it with just one layer and only the Keylight effect. In this example, I am using the Despill Bias to correct out the green spill, but I unlocked it from the Alpha Bias.

I can do a screen recording of this whole quick process, I just wanted to get this pic up so you could check it out.

sean

[thundering1]

That's perfect!

Yeah - I was planning on doing 2 layers of footage - the top with a garbage matte so I don't have to worry about keying out reflections in their eyes, shiny parts of their uniforms or parts of the controls, etc.

But - still getting the out of focus edges of the greenscreen was turning out to be a PITA!

Hadn't thought of doing multiple mattes for specific color corrections - that's awesome!

Yes - please do a screen grab tut - I'd really appreciate that! I know you're busy - not like you need to finish it this weekend or anything - there's at least 3 weeks before I can really get to this footage anyway (got 2 catalogs worth of images to finish in the next 3 weeks - the short will have to wait).

If you want, for the screen grab/tut, I can post a short clip on my site for you to pull down (instead of it being a still image) for you to show how it works (you've really gotta SELL these tuts - I'd buy them in a heartbeat!). Or if you think the still covers everything just fine, go for it!

Thanks again-
-Lew

[mackdadd]

Ok, here's a little something.

***file link removed***

Please keep in mind, I just show how to quickly get it 60%-70% of the way there. I'm sure with the actual file sequence, there might be some smoothing and grain issues to deal with.

But this should get you started. :) Ask questions if something is not clear.

[thundering1]

Thank you SO much!
I've downloaded it, and I'll watch it tomorrow morning.

-Lew :-)

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.