JpylyzerBusinessActivity: Difference between revisions

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(Created page with "==Business Activity== The existing digitisation workflow for mass digitisation projects at this organisation migrates camera raw images from the digitisation studio to TIFF fi...")
 
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*Implement and test workflow to migrate and validate JP2s
*Implement and test workflow to migrate and validate JP2s
*Large scale trial run
*Large scale trial run
====Explanation====
Moving from TIFF to JP2 for the storage of digitised masters will not suit every collection or organisation. Benefits can include reduced storage cost (if lossy compression is utilised) and improved user experience (if images are optimised and delivered to browser by an appropriate system). However, these benefits introduce preservation risks (some which are not mitigated by Jpylyzer). Lossy compression lowers the quality of the stored images. The trade off between, cost and risk will be different in different situations. Making an appropriate choice for the collection and organisation in question is essential, and should be guided by [[Understand your collection|collection needs]], institutional policy, a careful evaluation of the alternatives, practical testing of software with real data, and a clear appreciation of the [[Digital preservation risks|risks]] involved.

Revision as of 15:48, 23 April 2014

Business Activity

The existing digitisation workflow for mass digitisation projects at this organisation migrates camera raw images from the digitisation studio to TIFF files for storage as master images in the long term digital respository. The proposed business activity will instead migrate camera raw images to JP2, and then validate the construction of these files using Jpylyzer. The main activities are:

  • Develop appropriate JP2 profile and compression level targets
  • Assess, select and test JP2 migration software
  • Implement and test workflow to migrate and validate JP2s
  • Large scale trial run

Explanation

Moving from TIFF to JP2 for the storage of digitised masters will not suit every collection or organisation. Benefits can include reduced storage cost (if lossy compression is utilised) and improved user experience (if images are optimised and delivered to browser by an appropriate system). However, these benefits introduce preservation risks (some which are not mitigated by Jpylyzer). Lossy compression lowers the quality of the stored images. The trade off between, cost and risk will be different in different situations. Making an appropriate choice for the collection and organisation in question is essential, and should be guided by collection needs, institutional policy, a careful evaluation of the alternatives, practical testing of software with real data, and a clear appreciation of the risks involved.