Image Derivative Creation

Overview

By selecting the fourth option ( Create image derivatives for load ) from the Batching Menu, the SobekCM METS Editor can be used to create image derivates from archival TIFF files. This process can create jpegs, jpeg2000, and jpeg thumbnails. These image derivatives may be useful for loading into any digital repository, but are particularly useful for loading into a SobekCM Digital Repository.

You can control which files are generated as well as the dimensions for the jpeg and jpeg thumbnails. The defaults are the values used by the Digital Library of the Caribbean and University of Florida Digital Collections. The JPEG2000s are generated per the NDNP specifications.

Preparation

The METS Editor uses the free Kakadu encoder which installs with the software for creating JPEG2000s. However, you will need to install a version of ImageMagick for creation of the JPEG images. Once you install any version of ImageMagick, you will need to restart your computer (although it won't prompt you to).

The first time you run the image derivative option, you will eventually be asked to browse to your installation of ImageMagick.

Figure 1: ImageMagick Settings Form

Once you enter this value once, you will not be prompted again, unless you uninstall ImageMagick.

Process Instructions

Selecting the fourth option ( Create image derivatives for load ) from the Batching Menu will launch the Image Derivative Creation Form:

Figure 2: Image Derivative Creation Form

Once you enter your desired settings, press CREATE. A dialog box will appear to allow you to set the top-level folder. Every file and folder under that top-level folder will be processed and image derivatives will be created as necessary.

Progress will be displayed at the bottom of the form:

Figure 3: Processing Image Derivative Creation Form

A message will be displayed once the process is complete:

Figure 4: Processing Complete Message