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 reggilbert
13 Jan 2011, 06:07
Forum: Show and Tell / Book Projects
Topic: Let's Make A DIY Book Scanner Test Chart
Replies: 32
Views: 43743

Re: Let's Make A DIY Book Scanner Test Chart

I'm more interested in content recognition... which is where my suggestions are based from.. I do think that is a different mission from the one I am attempting. It might work fine for people to propose and discuss varying test pages with different purposes on this thread, or maybe it would work be...
by reggilbert
12 Jan 2011, 23:27
Forum: Show and Tell / Book Projects
Topic: Let's Make A DIY Book Scanner Test Chart
Replies: 32
Views: 43743

Re: Let's Make A DIY Book Scanner Test Chart

Do we want to test functionality of say content selection algorithms like in ST for the Mixed mode? That sounds complicated enough (and ever-changing, as Tulon seems to be ongoingly addressing such issues in the current dewarping thread in the Scan Tailor forum) to require a separate test page. if ...
by reggilbert
12 Jan 2011, 17:46
Forum: Show and Tell / Book Projects
Topic: Let's Make A DIY Book Scanner Test Chart
Replies: 32
Views: 43743

Re: Let's Make A DIY Book Scanner Test Chart

Pasted in below (as degraded JPEG) and attached (as much sharper PDF) is a proposed test page, designed to fit the criteria listed in Daniel's last post, which I understand to be to enable assessment of evenness of lighting and effectiveness of camera settings as applied to the basic mix of types of...
by reggilbert
11 Jan 2011, 01:12
Forum: Show and Tell / Book Projects
Topic: Let's Make A DIY Book Scanner Test Chart
Replies: 32
Views: 43743

Re: Let's Make A DIY Book Scanner Test Chart

At a press they use a specialized piece of software/hardware called an Imagesetter... to simulate the dot patterns as if it was printed on an offset printer I believe an imagesetter is the machine that outputs either positive images (on film or paper, pasted up on pages and given to the print shop ...
by reggilbert
10 Jan 2011, 23:43
Forum: Scanners and Build Threads
Topic: Ryan's Stowable Scanner Build Thread
Replies: 40
Views: 32754

Re: Ryan's Stowable Scanner Build Thread

First, roughly how far above the platen should the lights be mounted to minimize glare? The people who received Daniel's latest build tried to figure this out and determined that the LED lighting provided with that machine needed to be 55 inches above the table they were using. Pic and comment in t...
by reggilbert
07 Jan 2011, 16:46
Forum: Scan Tailor
Topic: Making the Select Content Box fixed... or disabled?
Replies: 31
Views: 23693

Re: Making the Select Content Box fixed... or disabled?

I'm thinking a lot about mouse-related tendinitis these days. FWIW. This concerns me on an ongoing basis. Like our eyes, without good use of our hands, we can be devastated professionally. Tendinitis itself is bad enough, but it can be just the first stage of irreversible injury. My first professio...
by reggilbert
05 Jan 2011, 19:43
Forum: Show and Tell / Book Projects
Topic: Let's Make A DIY Book Scanner Test Chart
Replies: 32
Views: 43743

Re: Let's Make A DIY Book Scanner Test Chart

Dear fellow forum members, In an earlier post in this thread I raised the possibility of technical complications with screened images on a proposed test page that would help us evaluate a scanner's ability to capture the majority of images found in books, including almost all photos in books. Today ...
by reggilbert
04 Jan 2011, 19:48
Forum: Tutorials/How-To's
Topic: My workflow for almost djvubind-equivalent PDFs...
Replies: 19
Views: 24966

Re: My workflow for almost djvubind-equivalent PDFs...

Can someone explain to me the advantage, aside from file size, of complicated procedures like the above over simply importing page images into Acrobat? Importing (combining in Acrobat lingo) is just a few clicks and perhaps three minutes' wait for a 300-page book. Acrobat OCR is about ten minutes' w...
by reggilbert
04 Jan 2011, 16:10
Forum: Show and Tell / Book Projects
Topic: Let's Make A DIY Book Scanner Test Chart
Replies: 32
Views: 43743

Re: Let's Make A DIY Book Scanner Test Chart

a standard chart or book that we can all compare our scanners with. It would be used in the following way: 1. Build scanner. 2. Put chart in scanner. 3. Scan it and post it here. This would include post-processing and an unprocessed image. That means 4. Other people can see if they like the results...
by reggilbert
04 Jan 2011, 06:10
Forum: Show and Tell / Book Projects
Topic: Let's Make A DIY Book Scanner Test Chart
Replies: 32
Views: 43743

Re: Let's Make A DIY Book Scanner Test Chart

I am not quite sure about what is being proposed in this thread. The idea is to give everyone a common standard with which to test their scanners. I thought the idea, as proposed by bnz on the "DSLR like cameras" thread, was to determine the camera quality / price / resulting image sweet spot. what ...