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BOPCRIS issue - Mix of compressed and uncompressed TIFFS

Created by Matt Phillips on Jun 13, 2011 · last edited by Julie Allinson · on Jul 27, 2011 (view history) · 12 versions

One line summary	The collection contains a mix of uncompressed and compressed TIFF files. The compressed TIFFs are not read correctly when derivatives are programmatically created.
Detailed description	Compressed and uncompressed TIFF images (possibly other formats) mixed in together, causing problems for building derivatives with PIL (Python Imaging Library). The PIL is not able to read Group 4 compressed TIFFs and so cannot create JPEG derivatives.
Issue champion	Matt Phillips
Possible approaches	Use a tool such as FITS (File Information Tool Set) to identify the file type and rate of compression of each file in the collection Script an open source imaging application such as Imagemagick or GIMP to convert compressed TIFFs to uncompressed TIFFs
Context	University of Southampton Library Digitisation Unit Context	AQuA:University of Southampton Library Digitisation Unit Context]
AQuA Solutions	Identify compressed TIFFs and convert them to uncompressed TIFFs
Collections	BOPCRIS