Search found 218 matches

by dpc
05 Jan 2017, 16:45
Forum: Cameras and Electronics
Topic: Dire camera situation 2017
Replies: 11
Views: 363

Re: Dire camera situation 2017

I'd be happy when Canon releases a mirrorless EOS camera that uses the EF lenses. There are ways to lock the mirror up on the EOS cameras but I've yet to figure out how to do this with their SDK. Doing that would help with the wear factor when scanning thousands of pages. Commercial scanners use DSL...
by dpc
28 Dec 2016, 12:59
Forum: Scanners and Build Threads
Topic: My DIY Scanner
Replies: 31
Views: 567

Re: My DIY Scanner

BillGill wrote:That sounds interesting. What program are you using? If it is available I might want to investigate it.


It's not available but I'm happy to answer any questions you may have about it.
by dpc
27 Dec 2016, 13:39
Forum: Scanners and Build Threads
Topic: My DIY Scanner
Replies: 31
Views: 567

Re: My DIY Scanner

When I scan a book I first take a few shots of calibration pages so that I can use them as input to front end stages of my software processing pipeline. One of these calibration pages is simply a 2"x2" black square positioned in the center of a white sheet of paper. During post-processing ...
by dpc
23 Dec 2016, 18:05
Forum: Scanners and Build Threads
Topic: My DIY Scanner
Replies: 31
Views: 567

Re: My DIY Scanner

I gave up on OCR and have resorted to using Adobe Acrobat's Clear Scan mode for PDFs. The amount of hand-holding required to produce error-free OCR'ed text was too burdensome, and besides I was digitizing books from my personal library and there are cases where I want the notes in the margins and va...
by dpc
23 Dec 2016, 12:44
Forum: Scanners and Build Threads
Topic: My DIY Scanner
Replies: 31
Views: 567

Re: My DIY Scanner

What would really be useful would be if somebody could supply me with a Windows DLL for the camera interface, so I could write an interface that would allow me to get into the camera, without have to learn all about working with the USB ports and then with the chdk software on the camera. I hear ya...
by dpc
04 Dec 2016, 20:16
Forum: HELP
Topic: Recommendations for scanning book covers/dust jackets?
Replies: 2
Views: 99

Re: Recommendations for scanning book covers/dust jackets?

I place the front dust jacket as the first page, inside flap as the second page, inside back flap as 2nd to last page, and back jacket as the last page in the PDF. I've never done anything with the spine image although I could see that it could come in handy if you wanted to implement something like...
by dpc
22 Jul 2016, 15:27
Forum: R&D and New Technologies
Topic: New Book Scanner ( page turner & tablet )
Replies: 1
Views: 798

Re: New Book Scanner ( page turner & tablet )

Thank you for posting a link to this new Casio book scanner. Do you happen to know the retail cost of this device? I don't understand the target market of this device. People that tend to buy automated page turning book scanners typically have many books to scan. Those type of people want higher qua...
by dpc
20 Jul 2016, 12:06
Forum: Tutorials/How-To's
Topic: [the archivist] DIY inserts for the tubes
Replies: 5
Views: 862

Re: [the archivist] DIY inserts for the tubes

There are a number of ways to solve this fastening problem. A simple way is to use a threaded rod and put rod coupling nuts on each end so that female threads are exposed on the ends of the rod allowing you to still use bolts to hold the tube to the sides. Thought if I were doing this, I'd use a pie...
by dpc
27 Jun 2016, 10:35
Forum: Scanners and Build Threads
Topic: Good scanner near Denver or in Colorado
Replies: 3
Views: 688

Re: Good scanner near Denver or in Colorado

If the photo books are spiral bound and will lay flat when opened, I'd just use a copy stand.
by dpc
18 May 2016, 14:27
Forum: Tutorials/How-To's
Topic: Converting Color/Grayscale Text Scans to Black & White
Replies: 29
Views: 12570

Re: Converting Color/Grayscale Text Scans to Black & White

It's interesting to see the difference in that same page that was scanned by Google here.

The pencil drawing in the center of the page has darker lines in some of the areas that might say something about the post-processing algorithm they are using.

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