Limited viewer and reader support of JPX

Version 1 by Johan van der Knijff
on Jan 24, 2013 13:44.

compared with
Current by Johan van der Knijff
on Jan 24, 2013 14:07.

Key
This line was removed.
This word was removed. This word was added.
This line was added.

Changes (5)

View Page History

h2. Risks
Viewing of files that use any of JPX's advanced features (fragmented codestreams, composites, advanced colour support) may turn out to be problematic in the future because of a lack of readers that support these features. This was already addressed by Goethals (2005), and the situation has become more poignant with Adobe's decision to [discontinue JPEG 2000 (incl. JPX) support in recent versions of Photoshop Elements|JPEG 2000 support discontinued in Photoshop Elements].

h2. Assessment

h2. Recommendations
Avoid JPX whenever possible and use JP2 instead. For typical archiving purposes, the only real advantage offered by JPX (over JP2) is its extended colour space support (CMYK spaces + support of N-component lookuptable-based ICC profiles).
Avoid JPX whenever possible and use JP2 instead (see also the Recommendations in Section 2 in Buckley & Tanner, 2009). For typical archiving purposes, the only real advantage offered by JPX (over JP2) is its extended colour space support (CMYK spaces + support of N-component lookuptable-based ICC profiles). With hardly any readers being available to handle these features, one should consider not using JPEG 2000 for such cases altogether.

h2. References
References to literature, etc.
Goethals, A. Action Plan Background: JPX. Florida Digital Archive, 2005. Link: [http://fclaweb.fcla.edu/uploads/Lydia%20Motyka/FDA_documentation/Action_Plans/jpx_bg.pdf|http://fclaweb.fcla.edu/uploads/Lydia%20Motyka/FDA_documentation/Action_Plans/jpx_bg.pdf]

Buckley, R. & Tanner, S. JPEG 2000 as a Preservation and Access Format for the Wellcome Trust Digital Library. King’s Digital Consultancy Services, 2009. Link:[http://library.wellcome.ac.uk/content/documents/22082/JPEG2000-preservation-format]