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image_crops.md

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Create and upload new image crops

The assets are organized in 3 folders on the P drive at P/Othmer Library/Digital Collections - External Access/Crops for Hydra Redesign/

Cropping an image:

  • Pick the image to use as the thumbnail.
  • Download the original tiff into uncropped_originals/. Use the base_name provided on the spreadsheet: https://docs.google.com/spreadsheets/d/1D4HFGb0Yy4iFDiRrbw9LKN51Dld8YAXklLAbAp0ZRTM/edit#gid=0
  • Open the tiff in your image software.
  • If you're making a thumbnail for a collection or a featured topic, crop the image to a 700 pixel square. (This is actually double resolution we display at, for high-res screens).
  • Regardless, crop such that height and width are equal or just eyeball the proportions for a hero image / featured collection image.
  • Save into the directory cropped_tiffs; optionally into the categories or collections subdirectory.
  • Add _full onto the filename.

Developer instructions for associating a cropped image with a collection:

  • At the command line, cd into the Crops for Hydra Redesign directory. (On a Mac, if you've installed the ignyte software, you'll find the shared drive in /Volumes/315chestnut). Use ImageMagick to resize the image with the quality settings recommended by google: convert cropped_tiffs/[BASE_NAME]_full.tif -resize [WIDTH]x -quality 85 -interlace JPEG -colorspace RGB web_ready/[BASE_NAME]_2x.jpg

  • Copy the resulting image into the code repository at the desired location under app/assets/images/. For a collection thumbnail, put it in app/assets/images/collections. Create a new branch, commit this change, push the branch, and create a pull request.

  • If you've added a collection image, once the new image has been deployed a rake task needs to be run to link the image to the collection itself. For documentation of that task, including an example, run RAILS_ENV=production bundle exec rake -D collection

  • For more background see #529