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
28 Jun 2018, 05:16
Forum: HELP
Topic: Converting PDF to ePub Calibre not working
Replies: 11
Views: 7700

Re: Converting PDF to ePub Calibre not working

Newer versions of Acrobat Pro join lines into paragraphs and in general try to save layout of original documents (as I remember Acrobat 11 Pro does). So usually no additional converting of line brakes into spaces is necessary (apart of typical OCR errors). Why do you think that this is so hard to d...
by zbgns
28 Jun 2018, 04:52
Forum: HELP
Topic: Converting PDF to ePub Calibre not working
Replies: 11
Views: 7700

Re: HELP this is much more difficult than I thought it should be

Well, I thank you for all of your advice. It kind of appears to be a hellava lot of work to create an epub because the text needs to be basically rebuilt, or rewritten into MS Word or some other word processor and then converted to an epub. You are fully right. There is a lot of work to convert pdf...
by zbgns
28 Jun 2018, 04:20
Forum: Scan Tailor
Topic: Scan Tailor Advanced
Replies: 104
Views: 79257

Re: Scan Tailor Advanced

Have you done tests comparing Acrobat against ImageMagick or other open tools for pdf to jpg image render? There are some ImageMagick recipes here https://stackoverflow.com/questions/6605006/convert-pdf-to-image-with-high-resolution I tried various methods in the past. My first method was pdf2tiff ...
by zbgns
26 Jun 2018, 17:45
Forum: Scan Tailor
Topic: Scan Tailor Advanced
Replies: 104
Views: 79257

Re: Scan Tailor Advanced

While on the topic of pdf to images: In my experience some pdf files unpack to images with negative black and white colors. To fix that run GraphicsMagick's convert command on the images with the command parameter -negate . I guess this happens in case of MRC compressed pdf files. https://en.wikipe...
by zbgns
26 Jun 2018, 07:01
Forum: HELP
Topic: Converting PDF to ePub Calibre not working
Replies: 11
Views: 7700

Re: Converting PDF to ePub Calibre not working

And don't forget to convert most line breaks into spaces, so that you have free flowing text for the Epub. It is better to use another OCR which does not keep the line breaks as Acrobat does, if the ultimate goal is an EPUB. Newer versions of Acrobat Pro join lines into paragraphs and in general tr...
by zbgns
26 Jun 2018, 03:22
Forum: HELP
Topic: Converting PDF to ePub Calibre not working
Replies: 11
Views: 7700

Re: Converting PDF to ePub Calibre not working

You may use Acrobat Pro to export the pdf to MS Word file (Save -> Export to -> Microsoft Word). Edit the output .docx (OCR errors corrections may be necessary it is also useful to use styles to indicate headings, chapters and so on). Afterwards this may be easely exported to epub format. BTW, Calli...
by zbgns
18 Jun 2018, 04:21
Forum: Scan Tailor
Topic: Scan Tailor Advanced
Replies: 104
Views: 79257

Re: Scan Tailor Advanced

But there's one functionality I'd advise to exclude: moving the dewarping from the final to the third stage. At least there should be an ability to keep it in stage 3. The reason for this, is that the dewarping is often crashing, with many of my scanned books. When this happens in the 3rd stage, it...
by zbgns
10 Apr 2018, 05:37
Forum: HELP
Topic: New and not sure where I am going wrong
Replies: 5
Views: 6472

Re: New and not sure where I am going wrong

I experimented with some implementations of the cardboard scanner concept and it seems that there are a few common issues that you apparently also encountered. It would be relatively easy to apply some improvements that may help in reduction of manual work during processing with Scan Tailor. Scan Ta...
by zbgns
08 Feb 2018, 04:07
Forum: Scan Tailor
Topic: Scan Tailor Advanced
Replies: 104
Views: 79257

Re: Scan Tailor Advanced

Thanks 4lex4, I really appreciate the new release. Your instructions on this forum were helpful and finally I was able to compile and run for a while (Ubuntu 16.04). It works fast and I haven't noticed any problem with the STA. The only inconvenience for me is that the dewrap function works signific...
by zbgns
30 Oct 2017, 08:35
Forum: Scan Tailor
Topic: Scan Tailor Advanced
Replies: 104
Views: 79257

Re: Scan Tailor Advanced

I am really happy that there is still development on ScanTailor. The Advanced version looks really great and seems to work seamlessly. I am even more happy seeing that there are also plans to adapt some features available in the Experimental version. I appreciate especially the dewrap correction bei...