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 311 matches

by dpc
12 Sep 2017, 13:17
Forum: Scanners and Build Threads
Topic: Two cameras in a cube of plexiglass (inverted design, ≈ 1000 pp/h)
Replies: 7
Views: 9655

Re: Two cameras in a cube of plexiglass (inverted design, ≈ 1000 pp/h)

Thanks for sharing your design. Good job! I had built something like this a few years ago except it was a single camera scanner. I did it to capture sample pages while I was developing my software post-processing pipeline so the throughput wasn't that critical. Imagine an open-sided retangular tube ...
by dpc
22 Aug 2017, 14:58
Forum: Show and Tell / Book Projects
Topic: Going to the Maker Faire
Replies: 5
Views: 5830

Re: Going to the Maker Faire

Good luck this weekend. Let us know how it turns out and what sort of interest there is for DIY book scanning.
by dpc
19 Aug 2017, 16:30
Forum: Scanners and Build Threads
Topic: Which one is better? Platen's angle 100 or 90 degree?
Replies: 30
Views: 9605

Re: Which one is better? Platen's angle 100 or 90 degree?

Do you think that even if the opposite page is only dimly lit that there will be a significant impact on quality in this case? Difficult to say. There are a number of variables that contribute to the overall impact of reflection artifacts. It could be that it isn't noticeable for black text on whit...
by dpc
17 Aug 2017, 11:42
Forum: Scanners and Build Threads
Topic: Which one is better? Platen's angle 100 or 90 degree?
Replies: 30
Views: 9605

Re: Which one is better? Platen's angle 100 or 90 degree?

If you're going to use a 90 deg platen you'll get adjacent platen reflections no matter how many lights you use. The light will be reflected off of the platen in the camera's view onto the adjacent platen, which then will be visible in the reflected viewspace. The only way to eliminate this is to ph...
by dpc
15 Aug 2017, 16:04
Forum: Scanners and Build Threads
Topic: Which one is better? Platen's angle 100 or 90 degree?
Replies: 30
Views: 9605

Re: Which one is better? Platen's angle 100 or 90 degree?

You'll still need to toggle the lights on/off for each shot or come up with a covering baffle that totally eclipses the light source so that it won't show up in the reflected platen image. I'd be concerned about turning the lights on/off that much during a scan but maybe that's not an issue. Instead...
by dpc
15 Aug 2017, 13:23
Forum: Scanners and Build Threads
Topic: Which one is better? Platen's angle 100 or 90 degree?
Replies: 30
Views: 9605

Re: Which one is better? Platen's angle 100 or 90 degree?

How about synchronizing and sequencing the lights and cameras? Camera 1 fires with only the RH light on. Camera 2 fires with only the LH light on. Sure you can do that. Downsides of this are that now your scanner requires two lights instead of one and you'll need a switching circuit or a moveable m...
by dpc
14 Aug 2017, 19:38
Forum: Scanners and Build Threads
Topic: Which one is better? Platen's angle 100 or 90 degree?
Replies: 30
Views: 9605

Re: Which one is better? Platen's angle 100 or 90 degree?

Got it. Here's what I think is a solution to the 90 degree reflection problem without raising the light source. Let me know if I'm wrong. In the first pic we see a single light source which will not be picked up by the camera as long as angle B is greater than angle A. In the second pic two light s...
by dpc
08 Aug 2017, 15:01
Forum: Scanners and Build Threads
Topic: Which one is better? Platen's angle 100 or 90 degree?
Replies: 30
Views: 9605

Re: Which one is better? Platen's angle 100 or 90 degree?

Could you instead of raising the height of the light source, simply put a shade or baffle between the light source and the books so that light falls only on the pages? The problem isn't that the light hits the the "outer" portion of the platen that isn't covering the actual page (you can zoom-in wi...
by dpc
13 Jul 2017, 20:03
Forum: Show and Tell / Book Projects
Topic: Hello from Daniel (July 2017)
Replies: 4
Views: 5221

Re: Hello from Daniel (July 2017)

Good to hear from you Dan! Looking fwd to seeing some of the things you've been up to. Anything you can discuss here or is it all hush-hush?
by dpc
10 Jul 2017, 20:26
Forum: Scanners and Build Threads
Topic: Which one is better? Platen's angle 100 or 90 degree?
Replies: 30
Views: 9605

Re: Which one is better? Platen's angle 100 or 90 degree?

Ugh. Just realized that Daniel's videos are no longer available (or it's some Adobe Flash thing that Windows 10 can't view). That would certainly make it hard for you to understand the adjacent platen pane reflection problem when using 90 degrees. I'll see if I can come up with a few images to help ...