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
28 Oct 2018, 14:18
Forum: Cameras and Electronics
Topic: Raspberry PI camera?
Replies: 19
Views: 106197

Re: Raspberry PI camera?

There are other folks that post on this site that would know more about what it would take to capture a live preview from a point-and-shoot camera like the Elph 160 and retrieve that image over a USB connection to a PC. I'm guessing it would involve using a PTP protocol extension via CHDK and LibUSB...
by dpc
27 Oct 2018, 11:56
Forum: Cameras and Electronics
Topic: Raspberry PI camera?
Replies: 19
Views: 106197

Re: Raspberry PI camera?

Press the 'FUNC' button, not the 'MENU' button on the back of the camera, then you'll see an option to change the image resolution. I had actually had this particular camera set to 'W' which is less than the 'L' 20 megapixel size. I was playing around with this a while back as the 'W' setting's aspe...
by dpc
26 Oct 2018, 20:01
Forum: Cameras and Electronics
Topic: Raspberry PI camera?
Replies: 19
Views: 106197

Re: Raspberry PI camera?

Another data point for you, Bill. I have a Canon Elph 160 here and I took a photo of a page from a random paperback here and the resulting 5152x2896 pixel JPG image file was 5.33MB in size. This camera doesn't have CHDK installed so perhaps that has something to do with what you're seeing? elph160.p...
by dpc
25 Oct 2018, 13:09
Forum: Cameras and Electronics
Topic: Raspberry PI camera?
Replies: 19
Views: 106197

Re: Raspberry PI camera?

OK, well thanks for trying. You might be able to upload your large images to one of the free image hosting sites out there and post a link here. You have to be wary of compression artifacts though. Some of these sites will allow large image files to be uploaded but they will compress your file to to...
by dpc
24 Oct 2018, 12:56
Forum: Cameras and Electronics
Topic: Raspberry PI camera?
Replies: 19
Views: 106197

Re: Raspberry PI camera?

Wow. Interesting results. It still would be worthwhile to see the image files directly from the two cameras to try to figure out why there was such a big difference in the final two files you've posted. Do you have the original page images available? The OCR'ed results are so dissimilar that if I di...
by dpc
15 Oct 2018, 16:14
Forum: Programs, Software releases, and more.
Topic: BookGapCheck: Quickly check if there are gaps or duplicates in a set of book page scan images
Replies: 9
Views: 3846

Re: BookGapCheck: Quickly check if there are gaps or duplicates in a set of book page scan images

My mistake. I thought it based the subrect from the edge of the page and not the edge of the image. Still could be helpful for a number of scanner designs that contain the page to the same area of the platen (i.e. camera frame) across the scan. It doesn't work for situations such as Bill's scanner, ...
by dpc
13 Oct 2018, 13:57
Forum: Programs, Software releases, and more.
Topic: BookGapCheck: Quickly check if there are gaps or duplicates in a set of book page scan images
Replies: 9
Views: 3846

Re: BookGapCheck: Quickly check if there are gaps or duplicates in a set of book page scan images

I think you only need to define the subrect of a page that contains the page number once. After you've done that the program assumes the page number is in the same location relative to the edge of the page on subsequent pages. At least I hope that's the case. The program that I wrote that controls m...
by dpc
12 Oct 2018, 13:43
Forum: Programs, Software releases, and more.
Topic: BookGapCheck: Quickly check if there are gaps or duplicates in a set of book page scan images
Replies: 9
Views: 3846

Re: BookGapCheck: Quickly check if there are gaps or duplicates in a set of book page scan images

Thanks for posting. It's an interesting tool and could be quite helpful. I first heard about this technique in the video describing the Google linear traveling book scanner in 2012 and thought it could be handy ( Google open sources a DIY page scanner ). The section of the original YouTube video des...
by dpc
08 Oct 2018, 21:07
Forum: Scanners and Build Threads
Topic: a small story for my scanner
Replies: 59
Views: 33543

Re: a small story for my scanner

honestly don't know which user billgill design is .
That user is JThomas. The scanner was first described by him in this post from 2012.

Bill's new "Tower" scanner was described in this thread.
by dpc
08 Oct 2018, 10:26
Forum: Scanners and Build Threads
Topic: a small story for my scanner
Replies: 59
Views: 33543

Re: a small story for my scanner

if you ever gonna build something based on this designs contact me Why would someone need to contact you? BTW, that "billgill" design came from another user on this site many years ago. Bill has actually come up with a new design of his own that is a vertical rectangular tube with the platen at the...