“Characterization” can mean many things (I’m particularly fond, especially in this context, of the OED’s “creation of a fictitious character or fictitious characters”).
After a year predominantly focussed on external SCAPE events (Open Research Challenges Workshop @ iPres, the First SCAPE Training Event in Guimarães) we finally organised another project internal scenario and developer’s workshop.
Part of my work on the SCAPE testbeds involves producing a workflow for the large scale migration of TIFF to JP2 files, with validation. The tests I have run all involve the lossy compression of files.
Two tools that could be used for the validation of image payload, and therefore success of a migration, are Matchbox, developed for SCAPE by AIT, and ImageMagick’s “compare” tool. One of Matchbox’s tests gives a result of SSIM, a value between 0 and 1. The metric I chose to use from “compare” was PSNR, a value in decibels.