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

Terrible 'Deskew'

Scan Tailor specific announcements, releases, workflows, tips, etc. NO FEATURE REQUESTS IN THIS FORUM, please.
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ibr4him
Posts: 102
Joined: 18 Oct 2010, 10:36

Terrible 'Deskew'

Post by ibr4him » 18 Oct 2010, 12:02

Hi,

I've found ScanTailor's "Deskew" feature to be terrible, it messes up my page angles and I have to manually (un)set angles for each pages. Is there any way to improve or well just disable deskew in ScanTailor? Its the only step that takes 50% of the time.

Many thanks!

Tulon
Posts: 687
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Re: Terrible 'Deskew'

Post by Tulon » 18 Oct 2010, 14:16

In my experience it only fails when there is a picture and no more than one or two lines of text.
If you upload a sample page, I'll take a look.
Scan Tailor experimental doesn't output 96 DPI images. It's just what your software shows when DPI information is missing. Usually what you get is input DPI times the resolution enhancement factor.

spamsickle
Posts: 596
Joined: 06 Jun 2009, 23:57

Re: Terrible 'Deskew'

Post by spamsickle » 18 Oct 2010, 14:22

That's where it's failed for me, typically, especially when the picture had some rectangle in perspective -- it seemed to want to make an edge of the rectangle horizontal.

ibr4him
Posts: 102
Joined: 18 Oct 2010, 10:36

Re: Terrible 'Deskew'

Post by ibr4him » 18 Oct 2010, 14:27

Theres no image but maybe it considers stylish borders as images?

Tulon
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Re: Terrible 'Deskew'

Post by Tulon » 18 Oct 2010, 14:34

Well, let's see a sample page, shall we?
Scan Tailor experimental doesn't output 96 DPI images. It's just what your software shows when DPI information is missing. Usually what you get is input DPI times the resolution enhancement factor.

ibr4him
Posts: 102
Joined: 18 Oct 2010, 10:36

Re: Terrible 'Deskew'

Post by ibr4him » 19 Oct 2010, 10:48

Sorry, here you go: http://bit.ly/dnPr40

Thanks!

Tulon
Posts: 687
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Location: London, UK
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Re: Terrible 'Deskew'

Post by Tulon » 19 Oct 2010, 15:19

Yeah, cursive scripts without a clear baseline are a problem. It might have still worked, were there more content per page.
I guess we do need mass-apply for deskew then.
Won't happen by the next release though - maybe the one after that.
Scan Tailor experimental doesn't output 96 DPI images. It's just what your software shows when DPI information is missing. Usually what you get is input DPI times the resolution enhancement factor.

ibr4him
Posts: 102
Joined: 18 Oct 2010, 10:36

Re: Terrible 'Deskew'

Post by ibr4him » 19 Oct 2010, 21:25

Ah okay. Can I just disable 'Deskew' then somehow, for now?

Tulon
Posts: 687
Joined: 03 Oct 2009, 06:13
Number of books owned: 0
Location: London, UK
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Re: Terrible 'Deskew'

Post by Tulon » 20 Oct 2010, 02:45

Unfortunately you can't. The best you can do is probably to let it run in automated mode and make its mistakes, then manually fix one page, and then do a search/replace in the project file.
Scan Tailor experimental doesn't output 96 DPI images. It's just what your software shows when DPI information is missing. Usually what you get is input DPI times the resolution enhancement factor.

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