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 5 matches

by hacecalor
09 Nov 2018, 13:14
Forum: Lighting
Topic: Using a polarizing filter to suppress glare and lighting reflections?
Replies: 8
Views: 76884

Re: Using a polarizing filter to suppress glare and lighting reflections?

Oh shoot, I'm sorry to hear that! The forum is behaving strangely for me, it threw a 500 error at least once and is taking forever to load. I really do appreciate the effort you put in, even if I can't see it yet :) The CPL arrived yesterday, and it may be premature but I think this thing is magic. ...
by hacecalor
06 Nov 2018, 09:42
Forum: Lighting
Topic: Using a polarizing filter to suppress glare and lighting reflections?
Replies: 8
Views: 76884

Re: Using a polarizing filter to suppress glare and lighting reflections?

Thanks for the resources. And yeah, looking at the design for the Archivist I can see the ideal angle is 100 degrees. I wouldn't mind taking a look at those formulas. My primary goals for my scanner are portability and price (hence trying to cut corners with the polarizing filter), but the more I ca...
by hacecalor
05 Nov 2018, 15:51
Forum: Lighting
Topic: Using a polarizing filter to suppress glare and lighting reflections?
Replies: 8
Views: 76884

Re: Using a polarizing filter to suppress glare and lighting reflections?

Thanks for the suggestions. You're right, ideally the scanner would be designed to make glare a non-issue. When I start committing a design to paper or CAD, I'll take the cradle angle/light heights etc. into consideration. I'm still wondering if using a polarizing lens would be a cheap and easy solu...
by hacecalor
05 Nov 2018, 10:01
Forum: Lighting
Topic: Using a polarizing filter to suppress glare and lighting reflections?
Replies: 8
Views: 76884

Using a polarizing filter to suppress glare and lighting reflections?

The biggest problem I had with my last scanner (which I scrapped) was the dreaded reflections and glares caused by the glass platen. Even worse, I was photographing books with glossy-coated pages, so I was getting reflections from the opposite page that were strong enough to throw off the OCR. This ...
by hacecalor
29 Sep 2016, 08:34
Forum: OCR/Optical Character Recognition
Topic: How to edit the text layer of a PDF?
Replies: 3
Views: 4962

How to edit the text layer of a PDF?

Hi all, I'm in the process of building my scanner, so I haven't completed any projects yet, but I have made a couple of PDFs using photos from the Internet Archive. My question is about how one would modify the text layer of a PDF. Google doesn't seem to be very helpful about it. I'm using Tesseract...