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

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by zbgns
18 Jul 2019, 03:30
Forum: HELP
Topic: How to crop and deskew pages using only free software?
Replies: 6
Views: 148

Re: How to crop and deskew pages using only free software?

I do not expect that Scan Tailor is able to provide perfect or very good results without some manual corrections. It is universal tool but it seems you would need something more customized and tailor made. Maybe something based on OpenCV?
by zbgns
17 Jul 2019, 17:33
Forum: Programs, Software releases, and more.
Topic: djvu 1bit vs 8bits
Replies: 5
Views: 472

Re: djvu 1bit vs 8bits

PDF in Abbyy. djvu with djvu small mod. I do not have much experience with Abbyy Finereader. However I would guess is that in case of 1 bit pictures there is jbig2 compression applied and no MRC compression is necessary. In case of grayscale images, algorithms do separation of foreground (letters) ...
by zbgns
17 Jul 2019, 17:04
Forum: HELP
Topic: How to crop and deskew pages using only free software?
Replies: 6
Views: 148

Re: How to crop and deskew pages using only free software?

some screenshots in order to make my above comments more clear. Zrzut ekranu z 2019-07-17 20-33-54.png Zrzut ekranu z 2019-07-17 20-34-08.png Zrzut ekranu z 2019-07-17 20-41-41.png Zrzut ekranu z 2019-07-17 20-35-33.png Of course the book must be in the same position at each picture. Especially the ...
by zbgns
17 Jul 2019, 14:30
Forum: HELP
Topic: How to crop and deskew pages using only free software?
Replies: 6
Views: 148

Re: How to crop and deskew pages using only free software?

Scan Tailor Advanced has the 'crop' function. After 'Splitting' and 'Deskew' stages there is 'Page Box' in select content. There is rectangular selection (orange lines) that should cover the cropped area. You should apply 'Page Box' manual mode and 'Content Box' auto. Apply it separately to even and...
by zbgns
17 Jul 2019, 03:02
Forum: Programs, Software releases, and more.
Topic: djvu 1bit vs 8bits
Replies: 5
Views: 472

Re: djvu 1bit vs 8bits

What software do you used for creating pdf and djvu files?
by zbgns
18 Jun 2019, 07:08
Forum: Introductions and connections
Topic: Greetings from Kansas City, Missouri
Replies: 3
Views: 653

Re: Greetings from Kansas City, Missouri

Hi Brandon,

Many thanks for sharing effects of your work with all. I'm convinced that not only me but many other people keep fingers crossed for implementation of something similar to Adobe ClearScan.

Cheers.
by zbgns
13 Jun 2019, 03:33
Forum: Introductions and connections
Topic: Greetings from Kansas City, Missouri
Replies: 3
Views: 653

Re: Greetings from Kansas City, Missouri

Hello Brandon,
Effects of binarization presented in form of two screenshots at your Github repository are really impressive. Do you have plans to add some interface to your algorithm for users that want to use it as standalone program?
by zbgns
18 Mar 2019, 22:29
Forum: Tutorials/How-To's
Topic: How to convert a book to serchable pdf using open source software
Replies: 12
Views: 106052

Re: How to convert a book to serchable pdf using open source software

I have a question though: is it possible to somehow correct OCR output from Tesseract other than editing the pdf in Acrobat (I don't feel like paying monthly for that)? I've been trying to do OCR with gImageReader on Linux. It uses Tesseract and you can preview txt file, but to actually correct it,...
by zbgns
11 Feb 2019, 08:14
Forum: HELP
Topic: pdfbeads on Ubuntu 18.10
Replies: 3
Views: 1999

Re: pdfbeads on Ubuntu 18.10

Hmm, don't think it's this that is the cause - Ubuntu package for ImageMagick has never had jpeg2000 in my memory and pdfbeads has been falling back to JPEG quite happily for years (iunluding in at least but not limited to 18.04, 17.10, 17.04 and 16.04). The hard crash is new in Ubuntu 18.10. There...
by zbgns
11 Feb 2019, 05:53
Forum: HELP
Topic: pdfbeads on Ubuntu 18.10
Replies: 3
Views: 1999

Re: pdfbeads on Ubuntu 18.10

Another version of Ubuntu, another breakage in PDFbeads and dependencies. The standard ImageMagick version in Ubuntu’s repositories doesn’t support jpeg2000 compression. You need to compile newer version of ImageMagick to have this (it may be tricky as there are other dependencies that need to be r...