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 rajbot
16 Dec 2014, 15:16
Forum: Cameras and Electronics
Topic: Mirrorless DSLR for bookscanning
Replies: 20
Views: 19919

Re: Mirrorless DSLR for bookscanning

Support for the Nikon J4 has been now added to gphoto. The J4 is an 18.4-megapixel update to the J3.
by rajbot
25 Nov 2014, 14:49
Forum: Cameras and Electronics
Topic: Mirrorless DSLR for bookscanning
Replies: 20
Views: 19919

Re: Mirrorless DSLR for bookscanning

Hi, The J3 can be triggered remotely when connected via USB using the gphoto software. You can capture to either memory card or internal SDRAM. The command for capture is gphoto2 --capture-image-and-download --filename image.jpg If you have multiple cameras connected via usb, you can specify which c...
by rajbot
16 Nov 2014, 02:42
Forum: Scanners and Build Threads
Topic: Internet Archive tabletop Scribe scanner (TT Scribe)
Replies: 4
Views: 6915

Re: Internet Archive tabletop Scribe scanner (TT Scribe)

Hi Daniel, I asked about it, and am told that the design files will be posted.. they are still iterating on the design. As for cameras, they are shipping with three Nikon 1 J3s. I did the camera driver work for the J3 (and other Nikon 1-series cameras), and that work has been pushed upstream and is ...
by rajbot
16 Nov 2014, 02:26
Forum: Cameras and Electronics
Topic: Mirrorless DSLR for bookscanning
Replies: 20
Views: 19919

Mirrorless DSLR for bookscanning

Hi, If anyone is currently using DSLRs for book scanning, I wanted to drop a note about some research I've been doing on mirrorless DSLR cameras. The Internet Archive currently uses Canon DSLRs for its book scanners. On cameras such as the Canon 5D mk3, which let you lock the DSLR mirror and have a ...
by rajbot
04 Dec 2010, 02:03
Forum: Software
Topic: Autocrop algorithm for books scanned with Scribe Scanner
Replies: 9
Views: 6605

Re: Autocrop algorithm for books scanned with Scribe Scanner

spamsickle: I ran the autocrop code on the image you provided, and it didn't work well: http://imgur.com/JX2g5.jpg The reason for the failure is that this image is a bit different from a raw Scribe image. We see the book edge of the opposing side on the right of the image, and this is causing the bi...
by rajbot
03 Dec 2010, 03:10
Forum: Software
Topic: Autocrop algorithm for books scanned with Scribe Scanner
Replies: 9
Views: 6605

Re: Autocrop algorithm for books scanned with Scribe Scanner

Oh yeah, if you post a sample image (raw, uncropped) that I can test with, then I can provide a version that outputs the cropped, skewed page image for use in your processing pipeline, so you don't have to call imagemagick. Alternatively, we could try to integrate with whatever software you are usin...
by rajbot
03 Dec 2010, 02:43
Forum: Software
Topic: Autocrop algorithm for books scanned with Scribe Scanner
Replies: 9
Views: 6605

Re: Autocrop algorithm for books scanned with Scribe Scanner

Hi everyone, The autocrop utility is actually a C binary that outputs skew and crop information to stdout. There is a python wrapper that reads the crop data and writes it to scandata.xml, but you don't need to use that if you aren't using a scribe bookscanner. You call the utility like so: $ ./auto...