Do Google's book scanners use lasers?
AES
the scenes in various major libraries, use some kind of laser scanner?
Or some kind of CCD based digital-camera or mechanically driven
linear-CCD-array type scanners?
Anyone know?
Lutrin
> Anyone know?
[...]
I think Google uses scanners like these:
http://www.atiz.com/
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krokodyle
"Lutrin" <eli...@olympo.it> wrote
> I think Google uses scanners like these:
>
> http://www.atiz.com/
Absolutely not.
The Atiz scanners are manual and produce extremely high quality (color)
scans.
Much too slow and expensive for a very high volume operation.
The google machines reduce human intervention to a minimum in particular
automatic focusing and page turning.
When the book has been located properly and is in good shape (the binding
still holds up and the pages are not too brittle) and when the operator is
paying attention the result is in general OK, more or less.
Speed is the name of the game (only a few minutes per book) and therefore
problems arise frequently (as anyone who has downloaded more than a few
books can attest).
I have not been able to observe one such operation up close but only from a
distance and it was a sight to behold, a few machines, frantic operators and
mountains of books lying helter skelter in complete disarray totally mixed
up.
I tried to get closer but was told not to do so as this would distract the
operators.
Finally they do not use lasers or at least none that I could discern, just
ordinary optics.
bugbear
> Do Google's highly automated book scanners, working busily away behind
> the scenes in various major libraries, use some kind of laser scanner?
What kind of laser scanner did you have in mind?
BugBear
AES
Lutrin <eli...@olympo.it> wrote:
> I think Google uses [book] scanners like these:
>
> http://www.atiz.com/
Interesting. They brag about the uniformity with which their "LED
illumination system" illuminates pages or objects, so it's pretty
clearly a camera-type rather than laser-scanner-type system.
AES
bugbear <bugbear@trim_papermule.co.uk_trim> wrote:
The general approach used in retail product-code scanners, except
expanded to 2D.
Bernd Alheit
Why did you post this in comp.text.pdf.
krokodyle
"Bernd Alheit" <be_...@yahoo.de> wrote in message
news:hgg303$s8r$00$1...@news.t-online.com...
Maybe because google books downloads are pdf files. :-)
AES
Bernd Alheit <be_...@yahoo.de> wrote:
I assume the output from the Google effort will include -- sooner or
later, anyway -- PDF output; there are an enormous number of paper
documents scanned to PDF elsewhere; comp.text.pdf seems a fairly low
traffic group; and it just seemed that someone on this group might have
a professional or incidental involvement with or knowlededge of the
Google program.
krokodyle
"AES" <sie...@stanford.edu> wrote
> I assume the output from the Google effort will include -- sooner or
> later, anyway -- PDF output...
It already does!
alex
copywrite enfringement.... So not sure how long they will be scanning
books for in anycase...
Alex