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Re: Luma keying

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Re: Luma keying
by Bruce Quayle on Aug 26, 2008 at 4:23:51 am

Hi Steve,
Yeah - been in the industry since 1976 - started at the BBC in London...heck I bet not many folks on this forum even know what a two inch quad is!
Well...I'm not doing so well with my "luma key" and hopefully you can stear me in the right direction.
I had a situation where I had a VERY contrasty situation and want to show detail in the darker areas. I shot a static of the scene first exposing the important area and blowing out the backlit area. Then I exposed for the backlit area leaving the forground in the dark. I now want to compose the two together by keying out (I guess 'masking out') the blownout areas and replace that part of the picture with the shot exposed for the backlight.
Unfortunately I just can't get it right. With a simple luma keyer, it would have been a simple process - much like chroma keying, but I'm stumped! Can you help?
Cheers,
Bruce

Bruce Quayle


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