h2. 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.
h2. 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|Resolution not in expected header fields] may lead to loss of this information after migration and failure of OCR software)
h2. 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|http://www.openplanetsfoundation.org/blogs/2012-09-04-automated-assessment-jp2-against-technical-profile]. Test data are provided there as well.
h2. 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
h2. Example files
N/A
h2. References
[Automated assessment of JP2 against a technical profile|http://www.openplanetsfoundation.org/blogs/2012-09-04-automated-assessment-jp2-against-technical-profile]
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.
h2. 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|Resolution not in expected header fields] may lead to loss of this information after migration and failure of OCR software)
h2. 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|http://www.openplanetsfoundation.org/blogs/2012-09-04-automated-assessment-jp2-against-technical-profile]. Test data are provided there as well.
h2. 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
h2. Example files
N/A
h2. References
[Automated assessment of JP2 against a technical profile|http://www.openplanetsfoundation.org/blogs/2012-09-04-automated-assessment-jp2-against-technical-profile]