Rather than buy some digitization equipment Wikimedia UK might be better off hiring an instructor for a workshop on making one of these scanners. If you can find enough people interested in attending. Then everyone will be scanning things that interest them personally and more likely to see the the projects through.
Birgitte SB --- On Sat, 8/29/09, teak <teak.w...@gmail.com> wrote: > From: teak <teak.w...@gmail.com> > Subject: Re: [Wikisource-l] [Commons-l] Digitisation equipment > To: "discussion list for Wikisource, the free library" > <wikisource-l@lists.wikimedia.org> > Cc: "Wikimedia Commons Discussion List" <common...@lists.wikimedia.org> > Date: Saturday, August 29, 2009, 10:59 AM > The community at http://www.diybookscanner.org/ discusses design ideas > for DIY book-scanners - lots of in depth instructions and > useful tips. > > On Fri, Aug 28, 2009 at 9:10 PM, Lars Aronsson<l...@aronsson.se> > wrote: > > Gregory Maxwell wrote: > > > >> For digitizing what? > > > > Exactly, that's the first question. > > > >> Archive.org digitizes books using a pair of canon > 1Ds (? perhaps > >> it was a 5D? In any case the 5DII would be > sufficient now) on a > >> custom stand with a hacked up copy of gphoto2 to > actuate the > >> cameras. > > > > That's Brewster Kahle doing things many years ago > (2002? 2003?). > > Today, a much cheaper low-end digital SLR, or even > compact cameras > > will give you the needed 10 or so megapixels. But > again, if you > > need to pay your staff, a ten times more expensive > camera might > > easily pay its own cost in increased speed, or > increased shutter > > lifespan. > > > >> I'm not sure how they're dealing with curvature (I > think they > >> just may lay a glass plate on the pages), but it > would be easy > >> enough to solve using a laser pointer with a > pattern generating > >> holographic grating and a second exposure to > capture the page > >> distortion and some fairly simple software > processing after the > >> fact. > > > > The Internet Archive apparently uses a fixed glass, > and lowers the > > book cradle to turn pages, http://aipengineering.com/scribe/ > > > > Other designs have a fixed book cradle and lifts the > glass, e.g. > > the Atiz DIY, http://diy.atiz.com/ > > > > I thought the Internet Archive design was very clever, > since it > > keeps a fixed distance from lens to book surface > (beneath the > > glass), until I saw the bkrpr.org where you just lift > everything. > > That's a design for 2009! I haven't tried to build one > myself yet. > > > > ---- > > > > However, you can capture lots of books (that can be > opened fully) > > with a single camera, laying the book flat on a table > with a glass > > on top. That's just like a flatbed scanner (but much > faster) > > turned upside down. > > > > In January 2008, I used a 10 megapixel Canon EOS 400D > (Digital > > Rebel XTi) with a 50 mm lens to shoot this, laying > flat on a table > > under a glass, http://runeberg.org/stridfin/0226.html > > > > On that webpage, the image is reduced to 120 dpi (1.2 > megapixel), > > but the original is 300 dpi (7.5 megapixel). The map > shown is > > reused in http://en.wikipedia.org/wiki/Battle_of_Alavus > > > > That's an example of how one specialized book can be > very useful > > for a limited Wikiproject. This book was published in > 1909 for the > > 100th anniversary of the Finnish War (1808-1809), and > digitized in > > 2008 for the 200th anniversary. > > > > > > > > -- > > Lars Aronsson (l...@aronsson.se) > > Aronsson Datateknik - http://aronsson.se > > > > Project Runeberg - free Nordic literature - http://runeberg.org/ > > > > _______________________________________________ > > Wikisource-l mailing list > > Wikisource-l@lists.wikimedia.org > > https://lists.wikimedia.org/mailman/listinfo/wikisource-l > > > > _______________________________________________ > Wikisource-l mailing list > Wikisource-l@lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/wikisource-l > _______________________________________________ Wikisource-l mailing list Wikisource-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikisource-l
