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 duerig
Today, 11:21
Forum: HELP
Topic: Simultaneous capture with dual cameras and chdkptp.py?
Replies: 5
Views: 54

Re: Simultaneous capture with dual cameras and chdkptp.py?

Great to see you've got it sorted. There are two reasons why I host a custom CHDK image. First, it lets me automatically set up the configuration (enable the crosshairs overlay to let you see the center of the viewfinder more easily to perfectly align the camera with a mirror, and give permission to...
by duerig
23 May 2018, 12:26
Forum: HELP
Topic: Simultaneous capture with dual cameras and chdkptp.py?
Replies: 5
Views: 54

Re: Simultaneous capture with dual cameras and chdkptp.py?

What you want here is a multi-process or multi-threaded program. This is how Pi Scan (which used chdkptp.py) does the simultaneous triggering. Feel free to take a look at the code here which uses multithreading: https://github.com/Tenrec-Builders/pi-scan The easiest way might be to just use the Pyth...
by duerig
21 May 2018, 23:56
Forum: Cameras and Electronics
Topic: Newbie questions about cameras
Replies: 6
Views: 93

Re: Newbie questions about cameras

I don't have experience with the Panasonic G5. So I can't recommend it (or dis-recommend it). But to answer your questions: (1) I think 'shutterless' and 'electronic shutter' are the same thing. Mirrorless cameras can have either mechanical or electronic shutters. The thing that mirrorless cameras d...
by duerig
10 May 2018, 12:12
Forum: Cameras and Electronics
Topic: Is there an optimal angle of view of the camera?
Replies: 4
Views: 260

Re: Is there an optimal angle of view of the camera?

There are two other constraints here. First, there will be a maximum and minimum distance from the camera which can remain in focus. The camera must be in this range of distance from the page. Second, since the page must be well-lit, the camera needs to be at a sufficient distance away so that it wo...
by duerig
11 Apr 2018, 12:08
Forum: Programs, Software releases, and more.
Topic: Pi Scan 1.5: DSLR and Mirrorless Camera Support
Replies: 3
Views: 700

Re: Pi Scan 1.5: DSLR and Mirrorless Camera Support

I was doing some research and it seems like JPEG actually preserves fine details pretty well. JPEG compression artifacts are much more likely to happen on large areas that are mostly the same color. Having said that, lossless is clearly better for archival purposes either way. Preserving detail 'pre...
by duerig
03 Apr 2018, 17:33
Forum: Cameras and Electronics
Topic: IXUS 160 Focal Plane
Replies: 7
Views: 293

Re: IXUS 160 Focal Plane

I have not seen this pattern with the focal plane before. I have seen the slight offset of the center when zooming in/out but that seemed innocuous. So it seems like there are two possibilities. One is that your camera has an unusual defect. The other is that your camera isn't actually aligned with ...
by duerig
02 Apr 2018, 22:26
Forum: Cameras and Electronics
Topic: IXUS 160 Focal Plane
Replies: 7
Views: 293

Re: IXUS 160 Focal Plane

You've hit one of the fundamental limitations in the possible quality provided by cheap point and shoot cameras. The focus on every camera is based on the distance of the target from the lens. On a properly aligned book page, the distance between the center of the page and the lens will always be le...
by duerig
30 Mar 2018, 11:40
Forum: Agora / The Marketplace
Topic: DIY Book Scanner Kits Now Available!
Replies: 104
Views: 66198

Re: DIY Book Scanner Kits Now Available!

Johannes, I believe that the cradle wing is in there as well. You won't want to cut it out of 19mm baltic birch plywood. You will instead need to cut it out of 12mm plywood. If the cradle wing isn't part of that file, let me know and I can link you to a DXF for just the cradle wing. That may be the ...
by duerig
27 Mar 2018, 12:06
Forum: Software
Topic: Using pi-scan
Replies: 9
Views: 270

Re: Using pi-scan

rduz, it looks like you might be going with a different setup now (one that doesn't use Pi Scan). But if you still want to resolve your Pi Scan issues, let me know and I will be happy to help you get things working. As an aside, there is another alternative to Pi Scan called TwoCamControl. This is a...
by duerig
13 Jan 2018, 11:13
Forum: Agora / The Marketplace
Topic: DIY Book Scanner Kits Now Available!
Replies: 104
Views: 66198

Re: DIY Book Scanner Kits Now Available!

The link at the top of the page should be fixed. Please let me know if you see any other broken links that need to be fixed as well.