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Help correcting reflections

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Help correcting reflections
by pmrasn on Aug 14, 2007 at 6:46:57 am

I am doing editing for a short film and unfortunately one of the actors had mirror sunglasses on which reflects the camera in a few shots. So I took some digital pictures of what should be reflected in his glasses hoping I'd be able to replace the reflection, however, I don't know the best way to go about doing so. Any help I can get will be greatly appreciated. Thank you.

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Re: Help correcting reflections
by IanCorey on Aug 14, 2007 at 12:55:03 pm

The most accurate way to do it would be to trace them frame by frame and apply that tracing to your still as a track matte.

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Re: Help correcting reflections
by artisanal television on Aug 14, 2007 at 1:59:47 pm

Tracing frame by frame could be very time consuming.

I might suggest tracking the rotation and position of the glasses, and applying that data to a cutout solid, THEN applying the cutout as a track matte to your digital still layer.

In Andrew Kramer's demon face warp tutorial (http://forums.creativecow.net/readpost/2/913298), he sticks a fake pair of sunglasses onto his actor.

You could use the same techniques for your track matte layer.

And one final idea -- you will want to apply some kind of optical distortion to the image being reflected -- probably a bulge would do, but you might even consider CC Sphere if you flip the image upside down and backwards first.

The point is that mirrored shades are not perfectly flat, and they tend to distort any image they reflect.

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Re: Help correcting reflections
by Darby Edelen on Aug 14, 2007 at 4:33:59 pm

[artisanal television] "I might suggest tracking the rotation and position of the glasses, and applying that data to a cutout solid, THEN applying the cutout as a track matte to your digital still layer."

I think (hope) there's an even easier way. If the sunglasses were very reflective then they are probably much lighter than their surroundings. You might be able to make a rough hold out mask around the glasses, apply a black & white Tint filter and then use Levels to create a matte for the glasses!

Darby Edelen
DVD Menu Artist
Left Coast Digital
Aptos, CA

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Re: Help correcting reflections
by pmrasn on Aug 18, 2007 at 3:54:19 am

Thank you for your input--I appreciate it greatly.



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