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This documentation covers the latest release of Islandora 7.x.

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Introduction

The Large Image Solution Pack loads all required Fedora objects and creates an empty collection object to accept TIFFs and JPEG2000s (JP2) and create derivatives, and also supports the installation of image viewers that can accommodate the larger resolution.

Requirements

This module requires the following modules/libraries:

To successfully create derivative data streams, ImageMagick (for TN & JPG) and Kakadu (for JP2) need to be installed on the server.

Configuration

Configure the image-toolkit to use ImageMagick rather than GD in Administration > Configuration > Media > Image Toolkit (admin/config/media/image-toolkit). If GD is selected, TN and JPG datastreams will not be generated.

Configuration

Select configuration options and viewer in Administration > Islandora > Large Image Collection (admin/islandora/large_image).

To use Kakadu, make sure that kdu_compress is available to the Apache user. Often users will create symbolic links from /usr/local/bin/kdu_compress to their installation of Kakadu that comes bundled with Adore-Djatoka. Make sure that the required dynamic libraries that come with Kakadu are accessible to kdu_compress and kdu_expand. If they are not present, attempting to run either command from the terminal will inform you that the libraries are missing. You can also use a symbolic link from /usr/local/lib to include these libraries. Remember to restart the terminal so your changes take affect. Also, make sure the php settings allow for enough memory and upload size: upload_max_filesizepost_max_size and memory_limit.

Configuration

Troubleshooting/Issues

Having problems or solved a problem? Check out the Islandora google groups for a solution.

Maintainers/Sponsors

Current maintainers:

Development

If you would like to contribute to this module, please check out CONTRIBUTING.md. In addition, we have helpful Documentation for Developers info, as well as our Developers section on the Islandora.ca site.

License

GPLv3


Additional Usage

The Large Image Solution Pack module's configuration page can be found at http://path.to.your.site/admin/islandora/solution_pack_config/large_image, and contains the following settings:

  • Lossless Derivative Creation?: Enabling this will force the Large Image Solution Pack to use reversible lossless compression when creating JP2 derivatives.  When a JP2 original is uploaded, a second "use" copy is created for the JP2 datastream.
  • Use Kakadu for Image Compression?: The Kakadu software suite can be installed on your server to take advantage of its much faster kdu_compress program.  Users often use the copy of kdu_compress that comes bundled with Djatoka (see below), but you can also check out the official website at http://www.kakadusoftware.com/ for download and installation instructions.

Viewers

If no viewers are installed, the Large Image Solution Pack module will use its standard viewer to display images. For better results, the Open Seadragon library can be installed; check that page for further instructions. If it is installed, it can be selected here.

Content Models, Prescribed Datastreams and Forms

The Large Image Solution Pack comes with the following objects in http://path.to.your.site/admin/islandora/solution_pack_config/solution_packs:

  • Islandora Large Image Content Model (islandora:sp_large_image_cmodel)
  • Islandora Large Image Collection (islandora:sp_large_image_collection)

An image ingested using the Large Image Solution Pack's content model using ImageMagick will have the following datastreams:

RELS-EXT

Default Fedora relationship metadata

MODS

MODS record filled out during ingest

DC

Dublin Core record

OBJ

Original TIFF or JP2 file uploaded

JP2JPEG 2000 derivative created by ImageMagick or Kakadu
JPGMedium-sized JPEG created by ImageMagick and used in the standard image viewer
TNThumbnail icon created from the image during the ingest process

The Large Image Solution Pack comes with the Large image MODS form.

To successfully create derivative datastreams, ImageMagick (TN & JPG) needs to be installed on the server. To create JP2 datastreams, Kakadu is the preferred solution, but ImageMagick can be used if it has been built with JPEG2000 support.
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