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

Libreflip - a new open source page-turning bookscanner

Built a scanner? Started to build a scanner? Record your progress here. Doesn't need to be a whole scanner - triggers and other parts are fine. Commercial scanners are fine too.
dpc
Posts: 304
Joined: 01 Apr 2011, 18:05
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Location: Issaquah, WA

Re: Libreflip - a new open source page-turning bookscanner

Post by dpc » 15 Nov 2018, 16:17

Are the scanner's cameras capable of capturing images at this point?

If so, after having mounted the light, do you see a reflection of the light source in the camera's view? Looking at the dimensions and angles of the platen and camera configuration shown in your first video, it looks like the cameras will always see a reflection of the light source with the current design.

You should also note that if the angle between the two platens is only 90 degrees, you'll see a reflection of the adjacent platen (page) in the captured image. The angle between the platens should be closer to 100 degrees to prevent this and to be able to position the light closer to the platen 'v'.

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Aegre Reminiscens
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E-book readers owned: kindle
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Re: Libreflip - a new open source page-turning bookscanner

Post by Aegre Reminiscens » 23 Nov 2018, 08:31

dpc wrote:
15 Nov 2018, 16:17
Are the scanner's cameras capable of capturing images at this point?
Yes and no. In Episode 24, they worked already, but more software development introduced a Bug, which is why currently they dont work. The Bug will be fixed, but the lovely Programmer is currently rather busy and does not have much free time to invest in Libreflip. I am very thankful for the volunteer-programmers helping me with this project, so I am in no position to complain about the delay. At some point they will work again. Hopefully soon.
dpc wrote:
15 Nov 2018, 16:17
If so, after having mounted the light, do you see a reflection of the light source in the camera's view? Looking at the dimensions and angles of the platen and camera configuration shown in your first video, it looks like the cameras will always see a reflection of the light source with the current design.

You should also note that if the angle between the two platens is only 90 degrees, you'll see a reflection of the adjacent platen (page) in the captured image. The angle between the platens should be closer to 100 degrees to prevent this and to be able to position the light closer to the platen 'v'.
Thank you for these thoughts. I hope I don't have to redesign the suction box (and the Book holder), but if I have to, and your thoughts sound a bit like that, then I will. Certainly I need more testing, before I will make that decision. Unfortunately, a 100° angle at that location will make the suction box considerably more difficult to be build by others, so I have to think about how I can reduce that complexity.
All my projects are documented here: http://www.ijon.me

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