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

Search found 21 matches

by wels
20 Aug 2010, 15:22
Forum: Lighting
Topic: LED Lighting systems for book scanning
Replies: 56
Views: 45765

Re: LED Lighting systems for book scanning

Yeah, I'm thinking something like Eagle , that will let us make a printed circuit board. Some time ago, my father pointed me to a new free alternative to Eagle which is called DesignSpark PCB . pro : It's free and is supposed to provide features available only in the commercial Eagle version (e.g. ...
by wels
15 Aug 2010, 13:34
Forum: OCR/Optical Character Recognition
Topic: Open Source OCR, an ABBY alternative?
Replies: 22
Views: 21659

Re: Open Source OCR, an ABBY alternative?

I'm just starting to read The Most Powerful Idea in the World , which posits that the reason technological advancement was flat for humanity's first 10,000 years, and then shot upwards starting around 1700 or so is that for the first time, people were allowed to profit from their ideas by means of ...
by wels
07 Aug 2010, 07:54
Forum: OCR/Optical Character Recognition
Topic: Proposed 100% Linux Workflow: Capture-Process-OCR
Replies: 25
Views: 28720

Re: Proposed 100% Linux Workflow: Capture-Process-OCR

Regarding an image viewer: My favourite one is geeqie (previously gqview ) is has some advanced features, supports some kind of remote control (haven't tested it indepth: geeqie --remote-help ), you can configure the type of filtering for zoom/fit to window, etc ... During scanning, I use it for qua...
by wels
06 Aug 2010, 07:10
Forum: OCR/Optical Character Recognition
Topic: the future of ocr ?
Replies: 10
Views: 9558

Re: the future of ocr ?

Does this sound useful? very, it also works for math formulas :) Regarding the usefulness of the topaz format (and its compatibility), I agree. This left aside, one could imagine to replace the bitmap layer within a PDF with a vectorized scan which would save a lot of space and even provides high q...
by wels
03 Aug 2010, 07:32
Forum: Show and Tell / Book Projects
Topic: Distributed Digital Library - Ideas
Replies: 23
Views: 17771

Re: Distributed Digital Library - Ideas

After over half a year of inactivity I passed by, looking up unread articles - here I am ;) I like the idea. A similar idea came across my mind last year: That it would be useful to have a distributed global directory of scanned books (esp. of private individuals) - just a collection/database of met...
by wels
27 Dec 2009, 21:40
Forum: Cameras and Electronics
Topic: CT scanning books
Replies: 9
Views: 5074

Re: CT scanning books

Well, it's the phase difference that is important, and specifically the phase difference of the same image pixel in different images. This means the position of that pixel, so effectively you have to match the images up and then determine the difference in position in each matching pixel. I haven't...
by wels
27 Dec 2009, 21:32
Forum: Scanners and Build Threads
Topic: ^ or V platen?
Replies: 15
Views: 8843

Re: ^ or V platen?

when imaging books, you probably want to exploit that specific situtation to gain optimal results: for example the lighting setup, it is constant for the whole document. auto-exposure will just (possibly) add uncontroled non-constness: different white-black levels for each image/page - bad for furth...
by wels
27 Dec 2009, 20:08
Forum: Cameras and Electronics
Topic: Imaging not scanning.
Replies: 10
Views: 7622

Re: Imaging not scanning.

make it more general ;)
"document digitizer" ?

but the native speakers have to figure this out ... :)
by wels
12 Dec 2009, 12:33
Forum: Tutorials/How-To's
Topic: post processing
Replies: 4
Views: 5076

Re: post processing

spamsickle, that's a great guide! Especially, for those who want to start with post processing for the first time. So, I created an article for it in the wiki, if it's ok for you. Feel free to further extend it, if you like.
by wels
12 Dec 2009, 12:10
Forum: Programs, Software releases, and more.
Topic: Same zoom level for each page in PDF files ?
Replies: 2
Views: 2709

Re: Same zoom level for each page in PDF files ?

What I can say in general is, that there is a size in length units (cm,inch) assigned to each page in a pdf. This is independent of the actual number of pixels of the image of a page. But together both make up the setting for resolution (dpi, lets say for simplicity: pixels per inch). Therefore, you...