Printed test sheets:
http://www.diytrade.com/china/4/products/1707979/IEEE_Resolution_Chart.html?r=0
or
http://www.aig-imaging.com/mm5/merchant.mvc?Screen=PROD&Store_Code=AIIPI&Product_Code=QA-60&Category_Code=Video-Scanner-Resolution-Charts
At 04:54 PM 5/2/2009 -0700, steve_at_archive.org wrote:
>On 5/1/09 8:27 PM, Lars Aronsson wrote:
>>Does anybody have a printed test sheet that we can scan or photo, and
>>then compare the resulting digital images? It should have lines at
>>various densities and areas of different colours, just like an old TV
>>test image. Can you buy such calibration sheets?
>
>archive.org scans typically include a color card target
>image near the back (or front) of the book, e.g.
>
>http://www-steve.us.archive.org/public/data/eg/birdsthateverych00doub/birdsthateverych00doub_jp2/birdsthateverych00doub_0371.jp2
>
>typical specs for our scanning rig (scribe) are roughly:
>
> 1 8x8x5' scribe structure
> 2 Canon EOS 5Ds
> 2 light boxes
> 1 orthogonal glass platen and cradle
> 1 foot pedal, pulley system
> Linux PC
> LAMP stack
> custom web-based UI
> gphoto, imagemagick, leptonica, rsync
> fast internet
>
>
>we scan over 1,000 books a day with about 100 scribes like this.
>
>
>/steve_at_archive.org
Received on Mon May 04 2009 - 09:06:51 EDT