Scanning backgrounds and overlays

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Scanning overlays


You can produce an overlay from a piece of artwork painted on a cel. To do so, you must scan the cel twice, backing it with different colored sheets of paper each time. For example:

ScanBackground compares the two scans and makes transparent any pixels which have markedly different colors. This avoids the dropout problems that can arise with a conventional Chromakey process.

Scanning in a new overlay
Making an overlay from existing images
Setting threshold levels for the overlay image
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Animo NT User's Guide - Version 2.0 - 29 Jan 1999
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