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Create Your Own Digital Library - Open Knowledge — LiveJournal

Jul. 30th, 2003

01:53 am - Create Your Own Digital Library

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From:joe_tofu
Date:July 30th, 2003 05:40 pm (UTC)

hmm

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Well, a camera has a curved lens, so there is some distortion. For that reason anybody who is serious about getting an accurate reproduction (artists, "analog" photographers) will need a scanner.
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From:gustavolacerda
Date:July 30th, 2003 07:59 pm (UTC)

Re: hmm

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It's not because the camera has a curved lens. Any "eye" is going to project a rectangle onto a sphere.

But that's a fairly small problem given a decent distance, say 70cm, especially if the text is going to be OCRed.

But for the sake of the pictures and all, you can always use some good old digital geometrical transforms, or maybe a special kind of lens designed to correct that. For the former approach, laying a gridded transparent glass on top of the sheet may be helpful.
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