New PDF release: Digital Imaging for Photographic Collections: Foundations

By Franziska S. Frey, James M. Reilly

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Extra info for Digital Imaging for Photographic Collections: Foundations for Technical Standards, 2nd Edition

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The sine waves in the two center rows of the image are used to calculate the MTF. After testing and comparing the sine-pattern and knife-edge techniques for determining MTF, IPI decided to include both methods in the test (Figures 32 and 33). The results indicated that both methods produce similar MTF characterizations under proper scanning conditions. It was found that the two methods responded differently to image sharpening, nonlinear output gamma mapping, and improper resampling methods. The advantage of using both methods simultaneously lies in the ability to detect undeBuilding the Image Quality Framework 25 sirable post-scan processing that has been intentionally or unintentionally applied.

51-53 Two basic types of image database can be defined, each needing different approaches to creation, access, and use of images. , an image database for an insurance company, a government agency, or a historical society. In this case, the intent is to have in the database a good-quality image that is not necessarily colorimetrically true to the original. It is the information content of the image that is important. It is agreed upon Building the Image Quality Framework 27 from the beginning that the digital file in the image database will not be used to reconstruct the original photograph or scene.

C. Russ, The Image Processing Handbook, 2nd ed. (Boca Raton, FL: CRC Press, 1995). A. Smith, Why Digitize? (Washington, DC: Commission on Preservation and Access, 1999). C. Stevenson and P. , Delivering Digital Images­— Cultural Heritage Resources for Education (Los Angeles, CA: Getty Information Institute, 1998). 44 Digital Imaging for Photographic Collections: Foundations for Technical Standards Selected Internet Resources Countless resources and references can be found on the Internet. The following list is a selection to start with.

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Digital Imaging for Photographic Collections: Foundations for Technical Standards, 2nd Edition by Franziska S. Frey, James M. Reilly


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