Latest release: 2.2 (January, 2024)

Jpylyzer is an open source validator and feature extractor for JP2 images. JP2 is the still image format that is defined by Part 1 of the JPEG 2000 image compression standard (ISO/IEC 15444-1).

Jpylyzer parses a file and runs its contents against a large number of tests, each of which is based on the requirements and restrictions that are defined by the standard. If a file fails one or more tests, this implies that it does not conform to the standard, and is not a valid JP2.

The development of jpylyzer was partially funded by the EU FP7 project, SCAPE (SCAlabable Preservation Environments).


Jpylyzer is maintained by Johan van der Knijff at the Koninklijke Bibliotheek, and the OPF provides hosting and coding support through software quality testing and delivery, and open source best practice.

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