Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

Understand DPI, it affects many things in Scan Tailor

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Misty
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Re: Understand DPI, it affects many things in Scan Tailor

Post by Misty » 12 Oct 2010, 09:27

It does vary a bit over the course of scanning a book, because the first page in a book is going to be a little closer to the camera and will take up more of the frame. I haven't typically found that it causes much difference to Scan Tailor, however. The only time I've had a very significant change was when the book was within less than a foot of the camera while scanning militia handbooks; in that case, I did have variations of up to 70DPI or so over the course of the book, but that didn't cause undesired results in Scan Tailor either.
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univurshul
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Re: Understand DPI, it affects many things in Scan Tailor

Post by univurshul » 12 Oct 2010, 18:07

TJ-Shredder wrote:For Mac users as myself, finding the correct DPI works as follows.
I use the shareware GraphicConverter from http://www.lemkesoft.de/. It has some rudimentary processing possibilities...This is very exact, but in my experience, it could vary a bit...

I just tried this and am liking it; precise numbers, accuracy and makes sense. Thanks TJ-Shredder!

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