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Difference Keying?

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Jaeson KoszarskyDifference Keying?
by on Nov 12, 2009 at 4:01:13 pm


I'm using BorisRED v4 with Media100HD.

The object removal plug-in (motion key) looks interesting. I haven't actually tried it yet. But I'm wondering if the reverse can be accomplished. Rather than removing a moving object from a static background, can you key out the static background and keep the moving object?


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peter mcauleyRe: Difference Keying?
by on Nov 12, 2009 at 5:08:13 pm

Hi Jaeson,

The BCC Motion Key filter is capable of removing foreground objects from a background but the filter has no way to isolate the foreground object and composite that on a separate background. It's something that has been discussed internally in the past though and we may offer that in a future revision of BCC.



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Boris YamnitskyRe: Difference Keying?
by on Nov 12, 2009 at 5:10:57 pm

Although Motion Key filter was not designed for this task you can try to apply a difference key with the original. I expect you may see problems with the edges but you can further refine the edges with a matte choker. In other words you'll have to experiment. Good Luck.

Boris Yamnitsky

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Steve PankowRe: Difference Keying?
by on Nov 12, 2009 at 8:52:42 pm

Or BorisFX could just buy out Imagineer Systems ;)

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