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How to extract scanned pencil sketches from the background?

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Er, it's an awful lot easier.

Make sure the document is set to Transparent. Document > Transparent Background, then go Filters > Colours > Erase white paper. That's it.

It is also possible to adjust the transparency of the Alpha channel to lighten or darken the pencil strokes (or rather, the edges of them) by applying a Curves layer set to adjust Alpha.


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Yep, you're right that is certainly a lot easier!

Although this is where I show my lack of experience - How do I now save that extracted pencil sketch as a selection that can be re-coloured, etc.?

Many thanks.

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