SCAPEdev1 Workshop - Experimenting with Taverna

Introduction

Sven will tell us about the OpenJPEG Version 1.4 TIFF (Grayscale/RGB) to JP2 conversion workflow he added to the SCAPE group on myExperiment.

Exercise

• Download the Taverna 2.3 Workbench Release Candidate
  • Which is available for download from http://tinyurl.com/6y5q9wn
• Sign up on My Experiment
• Look at Sven's Workflow: http://www.myexperiment.org/workflows/2128.html
• Join the SCAPE group
• Fire up Taverna
• Use Sven's workflow:
  • Download the workflow.
  • Run it on the attached TIFF file.
  • Tweak the parameters to do a very lossy conversion.
• Use one of Sven's services:
  • Got to http://fue.onb.ac.at/scape-services/services/listServices
  • Copy the WSDL URL
  • Register it in Taverna as a new service
  • Use the XML splitters to open up the inputs and outputs
  • Run a file through

Notes

The underlying SOAP web service is password protected (basic http authentication). You can find the web service WSDL for this service here:

http://fue.onb.ac.at/scape-services/services/SCAPEOpenJPEG14Service?wsdl

When you execute the workflow, for the first time you will be asked to define a password for the credential manager, subsequently you will be prompted for the above mentioned credentials which will then be stored in Tavernas credential manager. In the next sesssions you will only have to use the credential manager password which then uses the stored user-password pair. Please make sure you have JCE installed, for your convenience, you can find the required jar files with installation instructions here: http://fue.onb.ac.at/scape/jce.zip

Please let Sven (or Alex) know if you have difficulties using this workflow.

A last note related to JPEG 2000: The "precinct" parameter is ommited, because OpenJPEG always crashed for my installation when using this parameter.