JP2 to TIFF file format migration with quality assurance

Created: 2013-02-07 14:00:18

This workflow reads a textfile containing absolute paths to JP2 image files and converts them to TIFF image files using Kakadu's j2k_to_image command line application (http://www.kakadusoftware.com).

Based on the input text file, the workflow creates a Taverna list to be processed file by file. A temporary directory is created (createtmpdir) where the migrated image files and some temporary tool outputs are stored.

Before converting the files, the JP2 input files are validated using the SCAPE tool Jpylyzer (http://www.openplanetsfoundation.org/software/jpylyzer). The TIFF files are validated using JHove2 (http://www.jhove2.org) and the original JP2 file and the migrated TIFF file are compared using a direct SIFTComparison metric of the SCAPE Matchbox tool (https://github.com/openplanets/scape/tree/master/pc-qa-matchbox). If the SIFTComparison result is greater than a defined treshold (treshold_value), the migration is supposed to be successful.

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