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 rkomar
03 Dec 2014, 13:50
Forum: "Destructive" Scanning
Topic: So long suckers! I'm scanning the easy way...
Replies: 7
Views: 11617

Re: So long suckers! I'm scanning the easy way...

Have you told the library owners that you're going to saw the spines off their books?
by rkomar
21 Oct 2014, 16:03
Forum: Tutorials/How-To's
Topic: Brand New: Initial Impressions & Searching for Answers
Replies: 4
Views: 7568

Re: Brand New: Initial Impressions & Searching for Answers

Older books may have pages that are warped by moisture. With a platen, you can flatten them out reasonably well. Without a platen, you may see different shading across the page if the lighting is oblique to it, or even distorted text in extreme cases. (I'm thinking of those designs that just have a ...
by rkomar
05 Sep 2014, 16:34
Forum: Tutorials/How-To's
Topic: Post-processing tweaks needed!
Replies: 15
Views: 14502

Re: Post-processing tweaks needed!

Thanks for the tip, dtic. My only Windows "computer" is a netbook with Windows 7 Starter and 1GB of RAM. It barely runs with no apps, and even the browser brings it to its knees. I'm not sure that I'm curious enough about ClearScan to put up with the aggravation of temporarily installing and running...
by rkomar
02 Sep 2014, 18:27
Forum: Tutorials/How-To's
Topic: Post-processing tweaks needed!
Replies: 15
Views: 14502

Re: Post-processing tweaks needed!

I'm not sure if ClearScan really does OCR, or if it just deals with shapes (without any meaning attached to those shapes). When you do the conversions, do you have to specify the source languages anywhere? Edit: Oops! I reread the preceding post and saw that OCR is used to make the documents searcha...
by rkomar
01 Aug 2014, 14:53
Forum: Cameras and Electronics
Topic: Best Camera setting for Canon A1400 ?
Replies: 15
Views: 8270

Re: Best Camera setting for Canon A1400 ?

The top and middle of each image is in focus, but the bottoms are going out of focus. I suspect that you'll get more OCR errors from the areas that are poorly focused. cday: try processing the bottoms of the sample images and see if they are clear enough for OCR. My guess is that the accents are goi...
by rkomar
01 Aug 2014, 04:00
Forum: Cameras and Electronics
Topic: Best Camera setting for Canon A1400 ?
Replies: 15
Views: 8270

Re: Best Camera setting for Canon A1400 ?

I still think you'd get better results if you got the pages in better focus. No camera settings are going to make blurry characters look better.
by rkomar
30 Jul 2014, 19:23
Forum: Cameras and Electronics
Topic: Best Camera setting for Canon A1400 ?
Replies: 15
Views: 8270

Re: Best Camera setting for Canon A1400 ?

You should center the camera over the middle of the book, and line it up to be perpendicular as best you can. One trick I've found for lining up the camera is to put a mirror against the glass, and adjust the camera angle until the reflected lens appears in the exact center of the photograph. If you...
by rkomar
18 Jun 2014, 18:07
Forum: Lighting
Topic: Light Wedge-style lighting?
Replies: 1
Views: 6750

Re: Light Wedge-style lighting?

The camera is much more sensitive to light intensity than the human eye is. So, the light across the page may look fine to your eye, but the photo might be darker on one side than the other. If you have one of these light wedges and a digital camera, I would suggest taking a picture of a lighted pag...
by rkomar
21 Apr 2014, 22:04
Forum: Scanners and Build Threads
Topic: A new scanner design using plastic tubing
Replies: 224
Views: 145297

Re: A new scanner design using plastic tubing

Cheap point and shoot cameras (e.g. Canon A series) are fixed aperture, so there's really no way to change the depth of field on them. You just have to be very careful about setting them up perpendicularly to the platen if you want good focus across the book page. A brighter light does help with kee...
by rkomar
15 Apr 2014, 19:27
Forum: Scanners and Build Threads
Topic: A new scanner design using plastic tubing
Replies: 224
Views: 145297

Re: A new scanner design using plastic tubing

Yes aluminum might do, but I think copper would be more rigid. The reason for putting reinforcing tubes inside the counter-balance arms is to give more rigidity. My feeling is that aluminum tube might be a bit bendy. That's different from my experience. I have a bicycle with a thinnish aluminum fra...