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 b0bcat
06 Mar 2018, 01:52
Forum: OCR/Optical Character Recognition
Topic: How to edit the text layer of a PDF?
Replies: 3
Views: 764

Re: How to edit the text layer of a PDF?

I may be sending you on a wild goose chase but this may have some leads: https://github.com/manisandro/gImageReader/ I haven't looked at it for some time but I recall a fairly recent version allowed input image pdf to be output with a text layer instead of ocr-only and (maybe) the recognized text co...
by b0bcat
12 Feb 2018, 13:37
Forum: Programs, Software releases, and more.
Topic: Make a djvu file and add ocr: DjVuToy; TiffDjvuOcr; CuneiDjVu
Replies: 12
Views: 3978

Re: Make a djvu file and add ocr: DjVuToy; TiffDjvuOcr; CuneiDjVu

I just added an update to the DRAFT MUG's GUIDE at https://forum.diybookscanner.org/viewtopic.php?f=19&t=2759 and as a lot actually relates to DjVu format it occurred to me to copy the relevant part here which I now do as follows: As will be seen from that thread, using free tools (MS Windows) one c...
by b0bcat
12 Feb 2018, 13:23
Forum: Tutorials/How-To's
Topic: DRAFT MUG's GUIDE: Converting old books to PDF
Replies: 6
Views: 7607

Re: DRAFT MUG's GUIDE: Converting old books to PDF

Well, time passes and 'solvitur ambulando' , one learns by doing... Glancing at this (draft) Guide of mine from back in early 2013 two material factors occur to mind from my experience gained in imaging a couple of decayed old books each year since then: 1) I recant! I recant! "#1. And don't usually...
by b0bcat
03 Jul 2017, 19:58
Forum: Tutorials/How-To's
Topic: DRAFT MUG's GUIDE: Converting old books to PDF
Replies: 6
Views: 7607

Re: DRAFT MUG's GUIDE: Converting old books to PDF

gImageReader 3.2.3 for MS Windows and Linux https://sourceforge.net/projects/gimagereader/?source=directory https://github.com/manisandro/gImageReader/wiki An interesting development in gImageReader 3.2.2 (Jun 30 2017) (current version now at v.3.2.3): " * Attempt to use original source image for P...
by b0bcat
06 Jun 2017, 17:42
Forum: Tutorials/How-To's
Topic: Heavy Speckling
Replies: 3
Views: 771

Re: Heavy Speckling

The specimen tif supplied is b&w 2-colors and although 300dpi, I noticed is either insufficiently defined and/or too over-exposed to capture small typeface print. If possible, the quickest route would seem to be re-scanning in greyscale at a suitable dpi, maybe say, 400, and adjusting the scanner op...
by b0bcat
22 May 2017, 15:52
Forum: Scan Tailor
Topic: What geometric distortions selections to use/choose?
Replies: 5
Views: 1362

Re: What geometric distortions selections to use/choose?

@OP - I haven't read your other posts and don't know how you scanned the image e.g. flatbed or camera, but if it were me, bitter experience would reconfirm the rule: time is most efficiently spent in getting the image quality optimal at the image/acquire stage, and not in trying to achieve too much ...
by b0bcat
29 Jan 2017, 15:05
Forum: Software
Topic: Lizardtech virtual printer
Replies: 2
Views: 1402

Re: Lizardtech virtual printer

Has anyone got a link to the MS Windows version of LizardTech Virtual Printer? I'm wondering if it has been 'disappeared' :?: or has changed name as I'm not finding it ...
by b0bcat
10 Dec 2016, 20:37
Forum: Scanners and Build Threads
Topic: Best non-DIY book scanners
Replies: 44
Views: 29019

Re: Best non-DIY book scanners [Plustek; Avision]

1) dead Plustek OpticBook 4800 - thankfully amazon.co.uk took this back and indeed declined my offer of pro-rata reduction of the fully reimbursed price for having used it for 7 months. The scans produced were fine and it operated faster than the 3600 plus you can get much closer to the spine but fo...
by b0bcat
01 Dec 2016, 21:43
Forum: Scanners and Build Threads
Topic: Best non-DIY book scanners
Replies: 44
Views: 29019

Re: Best non-DIY book scanners

Sounds about right - even for b&w text only I've learned it is indeed best to scan in greyscale and to take care first of all adjusting scanner options like brightness, contrast and gamma, especially with faded/yellowed pages, plus of course using a backing card when scanning thin paper with text bl...
by b0bcat
15 Nov 2016, 20:15
Forum: HELP
Topic: How 2 brighten / lighten 2 colours (1 BitsPerPixel) image?
Replies: 2
Views: 559

Re: How 2 brighten / lighten 2 colours (1 BitsPerPixel) image?

Thanks for that. In my experience it's true that fiddling with the scanner controls can often overcome this problem, however in the present case each affected page is a half and half of normal type (faint, under-inked) and emboldened italic letters (which being over-exposed 'merge ' into each other)...