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 314 matches

by dpc
01 Nov 2017, 09:07
Forum: Scanners and Build Threads
Topic: Archivar - wooden scanner based on Archivist
Replies: 23
Views: 17984

Re: Archivar - wooden scanner based on Archivist

If I had the task of scanning a large number of paperbacks (small, "normally closed" books) with text near the gutter and I was going to binarize the output using something like ScanTailor, I wouldn't even use a platen. I'd build a v-shaped cradle, use two cameras and an overhead light, and then hol...
by dpc
05 Oct 2017, 15:58
Forum: Scanners and Build Threads
Topic: Monson's Sticks: Cheap Single Camera Rig with Remote
Replies: 26
Views: 34243

Re: Monson's Sticks: Cheap Single Camera Rig with Remote

I am wondering if anyone has any information about how this works with paperback books.
My main concern would be the thickness of the stick preventing you from getting close to the gutter.
by dpc
04 Oct 2017, 14:36
Forum: Scanners and Build Threads
Topic: a small story for my scanner
Replies: 61
Views: 38418

Re: a small story for my scanner

In the photo you posted, the camera is casting a large shadow across the page due to the light source being over the camera. I'm assuming that for scanning you place the light elsewhere to prevent this? If you post additional photos, can you you include a shot of the scanner with the light in the po...
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: 10214

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: 6327

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: 11501

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: 11501

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: 11501

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: 11501

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: 11501

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...