Aletheia is an advanced system for accurate and yet cost-effective analysis, recognition and annotation of scanned documents. It aids the user with a number of automated and semi-automated tools which were developed and fine-tuned based on feedback from major libraries across Europe and from their digitisation service providers which are using it in a production environment.
Cutting-edge features are, among others, the support of top-down ground truthing with sophisticated split and shrink tools as well as bottom-up ground truthing supporting the aggregation of lower-level elements to more complex structures. The integrated rules and guidelines validator, in combination with powerful correction tools, enable efficient production of highly accurate ground truth as well as standardised electronic renditions of digitised documents.
In addition, special features such as a customisable virtual keyboard and the Aletheia Sans font with extensive coverage of special characters in Unicode have been developed to support working with the complexities of historical documents.
Aletheia is available in two editions:
There are numerous useful resources freely available, such as:
Read about use cases of Aletheia:
Aletheia Sans is a font derived from Dejavu Sans. It has been enriched with characters that were required by several large-scale European and American digitisation projects for historical documents. Where possible, code points recommended by the Medieval Unicode Font Initiative (MUFI) were used.
Important note: Installing the font permanently will prevent automatic font updates in the Aletheia tool. Future changes will not be visible until the new version of the font is installed manually.
Quality Prediction System for Large-Scale Digitisation Workflows
Proceedings of the 12th IAPR International Workshop on Document Analysis Systems (DAS2016), Santorini, Greece, April 11-14, 2016
Efficient OCR Training Data Generation with Aletheia
Short Paper Booklet of the 11th International Association for Pattern Recognition (IAPR) Workshop on Document Analysis Systems (DAS2014), Tours, France, April 2014, pp. 19-20
Aletheia - An Advanced Document Layout and Text Ground-Truthing System for Production Environments
Proceedings of the 11th International Conference on Document Analysis and Recognition (ICDAR2011), Beijing, China, September 2011, pp. 48-52