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Image does not comply to technical profile

Created by Johan van der Knijff on Jan 29, 2013 · last edited by Johan van der Knijff · on Jan 29, 2013 (view history)

Description

Institutional policies or digitisation guidelines may impose various constraints on the technical characteristics of preservation and access images. These constraints can be defined in a technical profile. If images don't conform to this profile, this may lead to a variety of problems.

Risks

Images may not meet quality requirements (e.g. lossy compression where lossless is required)
Performance problems in access environment (e.g. progression order that is not optimised for typical viewing use cases)
Interoperability problems (e.g. resolution that is not in expected header fields may lead to loss of this information after migration and failure of OCR software)

Assessment

Using a combination of Jpylyzer and [Schematron], it is possible to automatically assess a JP2 against a technical profile. The procedure is described in this blog. Test data are provided there as well.

Recommendations

Carefully consider the technical requirements that your JP2s should meet, and define a profile
Translate this profile to a set of Schematron rules
Use Jpylyzer and [Schematron] to determine if each JP2 meets the requirements

Example files

N/A

References

Automated assessment of JP2 against a technical profile