DIY Book Scanner

By the way, is the equation correct? With your example I am getting:

height = (9/2) / (100-90)
height = 4.5 / 10
height = 0.45

You forgot to take the tangent of the angle...

height = (9/2) / tan(100-90)
height = 4.5 / 0.176327
height = 25.52

How far away is your camera from the platen surface? If you're using a platen angle of 100 degrees, a bit of trig tells me that the camera would have to be positioned about 26" away from the platen surface when capturing a 9" wide page (just assumed your setup will be doing a max of 8-1/2 ...

Go to the content selection phase of ST, then sort your pages on the left by increasing height or width. Scroll to the end of the list of pages and ensure that the automatic content selection didn't include something on the page that shouldn't be there.

Technically, you're correct. You could also move the lights fore and aft to reduce the reflections back into the camera. There's an important bit you might have overlooked though. The camera's viewing angle is wider in that direction (camera aspect ration is wider than it is tall) so you'd have to m...

I would guess that the main reason is that the flat black paint works "good enough" and is cheaper and simpler to apply. I think most people go overboard on the black paint. There's really only a need to blacken the surfaces of the scanner that could reflect light off the glass and back in...

It's an interesting approach and I look forward to seeing your progress as you prototype it. There are two issues that I can think of that you'll have to be aware of when using the page turning system that you've described: 1) Some books have uneven page widths. It won't take much of a difference in...

What you're seeing is the reflection of the light off the platen and back into the camera's lens. Typical mitigation strategies are to move the light higher, or move the camera farther away from the platen and zoom in (i.e. decrease the camera's angle of view), the former being the easiest solution ...

The obvious improvement would be to have another page turning channel on the near end of the rail. That would double the throughput for each trip of the book down and back. Page tears/folds are scary and aren't going to win you any favors from librarians that let you in the door to scan their old bo...

Eliminating glare (reflection) isn't difficult once you understand what the contributors are that cause the artifact. I've been meaning to do a write up or whiteboard video on this for a while now to explain things in laymen's terms so that people can understand it better but I haven't had the time....

Just for fun, I have a single-page test scanner of my own design (basically a horizontal copy stand) and I just scanned 20 sequential pages from a hardcover book in 82 seconds. The book has a 9.25" x 6.0" (235mm x 152mm) page size and I scanned from a chapter roughly located in the middle ...