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

RK3188 & Software

General discussion about software packages and releases, new software you've found, and threads by programmers and script writers.
Post Reply
Cypris2010
Posts: 11
Joined: 06 Feb 2014, 10:58
Number of books owned: 0
Country: Germany

RK3188 & Software

Post by Cypris2010 » 13 Feb 2014, 04:07

Has anyone of you tried to run Scantailor, tesseract or the spreads script on an RK3188 Device like K-R42 (http://www.amazon.de/K-R42-Android-Hisi ... B00EGMTVEE) or any similar Devices.

Tecnical Data:
ARMv7-A, Up to 1.8 GHz Quad-core ARM Cortex-A9, Mali-400 MP (Quad core, 533 MHz),LPDDR2, DDR3, DDR3L support and up to 2 GB

Tulon
Posts: 687
Joined: 03 Oct 2009, 06:13
Number of books owned: 0
Location: London, UK
Contact:

Re: RK3188 & Software

Post by Tulon » 14 Feb 2014, 12:02

If you can put Linux on that device, it should be possible to build and run Scan Tailor / Tesseract / Spreads. Performance won't be great though. If CPU is not a bottleneck, I/O will be one. USB 2.0 is not exactly a high speed interface.
Scan Tailor experimental doesn't output 96 DPI images. It's just what your software shows when DPI information is missing. Usually what you get is input DPI times the resolution enhancement factor.

Cypris2010
Posts: 11
Joined: 06 Feb 2014, 10:58
Number of books owned: 0
Country: Germany

Re: RK3188 & Software

Post by Cypris2010 » 14 Feb 2014, 16:06

Why du you think that USB will be the bottleneck? The Cameras are also USB 2.0. Can you explain your idea a bit more?

Tulon
Posts: 687
Joined: 03 Oct 2009, 06:13
Number of books owned: 0
Location: London, UK
Contact:

Re: RK3188 & Software

Post by Tulon » 14 Feb 2014, 17:08

Actually, it may not be a big deal. I was under the impression that Scan Tailor output files are tens of MBs each, but it turns out they are typically much smaller. If your input files are JPEGs, you should be fine.
Scan Tailor experimental doesn't output 96 DPI images. It's just what your software shows when DPI information is missing. Usually what you get is input DPI times the resolution enhancement factor.

User avatar
jbaiter
Posts: 98
Joined: 17 Jun 2013, 16:42
E-book readers owned: 2
Number of books owned: 0
Country: Germany
Location: Munich, Germany
Contact:

Re: RK3188 & Software

Post by jbaiter » 15 Feb 2014, 05:00

We are working on it :-)
Right now we're focusing on getting spreads to run on the Raspberry Pi in combination with a more powerful machine on the network for the postprocessing.
Those results should transfer to other embedded ARM-Boards pretty well,though, and if desired the postprocessing can be done on the same machine as well.
A first version of this networked variant with a web interface will be shipped with 0.5, which should be out around March.

At least on the RPi, the specs are just far too weak to do any real postprocessing like ScanTailor, at most we could do manual cropping and maybe rotation. Any kind of image analysis is out of the question, though. Other ARM boards might fare better, me and Mark have been looking at some Allwinner boards (most notably the A20) that have a dual core processor and more RAM. We haven't ordered any for testing yet, though.
spreads: Command-line workflow assistant

Cypris2010
Posts: 11
Joined: 06 Feb 2014, 10:58
Number of books owned: 0
Country: Germany

Re: RK3188 & Software

Post by Cypris2010 » 28 Feb 2014, 06:28

I'm looking forward for your report of the testing.

markvdb
Posts: 90
Joined: 28 Dec 2010, 18:45
Number of books owned: 0
Country: Belgium

Re: RK3188 & Software

Post by markvdb » 27 Jun 2014, 09:39

We've tested this and similar quad cortex a9 boards and found them not powerful enough.

I will be looking at some really interesting 64 bit alternatives in the near future, both arm and x86. Will keep you up to date.
Mark
http://diybookscanner.eu - official EU diybookscanner kits - subscribe to our newsletter

Post Reply