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Derivative files are typically created before the ingest process is started. In most cases, each collection has a custom script (in the DMIC's space on Gavotte) for derivative creation.

Creating derivative images

(See the current scripts on Gavotte for the current practice.)

Image derivatives can be created using ImageMagick command-line utilities (convert or mogrify). The best example script to run these utilities is in the Hohenberger CVS, hohenberger\data\load_utils\

Our "typical" sizes for derivative images are:

  • thumbnail = 200 pixels wide
  • screen = 600 pixels wide
  • full = 1000 pixels wide
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