OpenSeadragon plugin for Omeka
- Omeka 2.0 or higher
gd(recommended) and/or the
exifmodules for PHP
How it works
Omeka uses ImageMagick to generate derivatives of any image added. For example, if you have an high resolution JPEG image, it will treat that image as the "original", and derive "fullsize" (medium resolution) images and thumbnails automatically.
The OpenSeadragon plugin uses OpenSeadragon's support for
"legacy image pyramids"
to pull in those original, fullsize, and thumbnail images from Omeka. Since
OpenSeadragon requires the image size to be stated explicitly for images in
any image pyramid, we need to obtain the dimensions from each of the files,
either through metadata stored in the Omeka database for each file, or through
Only works with original images in formats supported by OpenSeadragon's
LegacyTileSource class (JPEG, GIF, and PNG). Specifically, this impacts you
if you're using high resolution images in TIFF or JPEG 2000 (JP2) format.
If you want to load high resolution versions of these, you'll need to convert
them to a supported format or only rely on the