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 spamsickle
03 Jan 2017, 19:09
Forum: Cameras and Electronics
Topic: Dire camera situation 2017
Replies: 21
Views: 5353

Re: Dire camera situation 2017

I don't think 12 MP is required. I use 5 MP cameras I buy on eBay for under $100. Unless you're scanning large-format books, or books with really tiny glyphs, that's adequate, IMO.
by spamsickle
08 Mar 2016, 10:31
Forum: OCR/Optical Character Recognition
Topic: Google Cloud Vision
Replies: 1
Views: 1935

Re: Google Cloud Vision

I'm not sure how you conclude that it "seems very accurate" if you haven't tried it, unless that's an assumption based on Google's reputation. I tried it on one typical image from a recent book scan, and it dropped a lot of the text altogether. While the image was not enhanced for contrast, and was ...
by spamsickle
07 Jan 2014, 06:36
Forum: Cameras and Electronics
Topic: Cameras for the Hackerspace Scanner
Replies: 77
Views: 54916

Re: Cameras for the Hackerspace Scanner

I don't think there's any way to do it without adding a step. The problem is that a camera really has no good way to tell what a DPI value should be. If you're taking a macro picture of two ants fighting, you may have thousands of pixels per inch. If you're taking a picture of a distant galaxy, you ...
by spamsickle
06 Jan 2014, 07:20
Forum: Tutorials/How-To's
Topic: Windows vs Linux workflow
Replies: 5
Views: 4582

Re: Windows vs Linux workflow

I think Linux skills are a good thing to have, but you will probably have more OCR options under Windows. Scan Tailor also runs under Windows. I tend not to do any post-processing these days, so others probably have more informed opinions, but I'd say it should not be necessary to convert to Linux t...
by spamsickle
05 Jan 2014, 18:07
Forum: R&D and New Technologies
Topic: Methods To Sense The 3D Surface/Structure Of A Book
Replies: 358
Views: 166950

Re: Methods To Sense The 3D Surface/Structure Of A Book

3D Scanning with sub-mm resolution? "3D imaging systems have recently obtained increased publicity by their use in consumer electronics devices. Applications include gesture recognition or 3D mapping in autonomous cars. Today’s commercially available miniaturized 3D imaging systems are most commonl...
by spamsickle
25 Dec 2013, 14:47
Forum: Cameras and Electronics
Topic: Cameras for the Hackerspace Scanner
Replies: 77
Views: 54916

Re: Cameras for the Hackerspace Scanner

I hire someone to scan in my personal library 6 days/week. I'm too cheap to do that, but I envy you anyway. I notice when looking at an image of a sheet of paper taken with the 14 mp that it only had a resolution of 180 pixels/inch. To me that seems pretty low. Seems low to me too. I have been usin...
by spamsickle
24 Dec 2013, 09:16
Forum: Cameras and Electronics
Topic: Cameras for the Hackerspace Scanner
Replies: 77
Views: 54916

Re: Cameras for the Hackerspace Scanner

I already have 2 Canons so I will try CHDK, but for me it was not so much the price point but the higher resolution 20 MP compared to 16 MP which give you much better images to start with. Will still go to the Nikon showroom to see what they have to offer. Unless you are scanning newspapers or some...
by spamsickle
22 Dec 2013, 12:01
Forum: Cameras and Electronics
Topic: Cameras for the Hackerspace Scanner
Replies: 77
Views: 54916

Re: Cameras for the Hackerspace Scanner

I would not choose a camera which didn't support manual focus. Most books have pages with lots of white space at the beginnings and ends of chapters (and elsewhere). Most autofocus cameras depend on contrast in the center of the image to work properly, and fail on these pages which don't have text i...
by spamsickle
22 Dec 2013, 11:36
Forum: Cameras and Electronics
Topic: Camera Triggering
Replies: 42
Views: 63522

Re: Camera Triggering

I've been using a timer script under CHDK to trigger my cameras for years now, and as far as I'm concerned that's the way to go. I just ran across this device called "triggertrap" which looks like it can enable cameras which are not CHDK-enabled to use the timer technique. It doesn't work on every c...
by spamsickle
24 Oct 2013, 15:13
Forum: Cameras and Electronics
Topic: Fujitsu ScanSnap SV600
Replies: 15
Views: 12997

Re: Fujitsu ScanSnap SV600

My interest would be primarily the software as well. I wouldn't be confident that the book thickness limit can be overcome. I doubt that there is any way to vary the focus of the camera, and I expect it's already pushing its high-depth-of-field lens just to scan from the near edge of the book to the...