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Corrupted JPEG and JPEG2000 files

Created by Swithun Crowe on Apr 18, 2012 · last edited by Paul Wheatley · on May 08, 2012 (view history) · 6 versions

Title	Corrupted JPEG and JPEG2000 files
Detailed description	JPEG/JPEG2000 scans are sometimes corrupted. They contain areas which come from other areas. When such an area contains a dark area (edge of scan showing page edges), this is particularly visible. When one area of text is on top of another area of text, it is less visible. The images have also been rotated after the corruption occurred. Also described here: Shifted Crop Corruption
Issue champion	Paul Wheatley
Other interested parties	Any other parties who are also interested in applying Issue Solutions to their Datasets
Possible Solution approaches	Put the images through a filter to detect edges Write program to find dark areas
Context	Details of the institutional context to the Issue. (May be expanded at a later date)
Lessons Learned	Notes on Lessons Learned from tackling this Issue that might be useful to inform digital preservation best practice
Datasets	BL 19th Century digitised newspaper collection
Solutions	Corrupted JPEG and JPEG2000 files solution