Prof Apostolos Antonacopoulos' Outputs (21)

NAME – A Rich XML Format for Named Entity and Relation Tagging (2023)
Presentation / Conference Contribution

We present NAME XML, a schema for named entities and relations in documents. The standout features are: option to reference a variety of document formats (such as PAGE XML or plain text), support of entity hierarchies, custom entity types via ontolog... Read More about NAME – A Rich XML Format for Named Entity and Relation Tagging.

A survey of OCR evaluation tools and metrics (2021)
Presentation / Conference Contribution

The millions of pages of historical documents that are digitized in libraries are increasingly used in contexts that have more specific requirements for OCR quality than keyword search. How to comprehensively, efficiently and reliably assess the qual... Read More about A survey of OCR evaluation tools and metrics.

Crowdsourcing historical tabular data : 1961 census of England and Wales (2019)
Presentation / Conference Contribution

This paper describes how crowdsourcing can be incorporated as an integral part of a comprehensive technical workflow to identify, extract and validate data from large volumes of printed tabular statistics, and transform them into operable digital dat... Read More about Crowdsourcing historical tabular data : 1961 census of England and Wales.

Towards the extraction of statistical information from digitised numerical tables - the Medical Officer of Health reports scoping study (2019)
Presentation / Conference Contribution

Numerical data of considerable significance is present in historical documents in tabular form. Due to the challenges involved in the extraction of this data from the scanned documents it is not available to researchers in a useful representation tha... Read More about Towards the extraction of statistical information from digitised numerical tables - the Medical Officer of Health reports scoping study.

ICFHR 2018 Competition on recognition of historical Arabic scientific manuscripts - RASM2018 (2018)
Presentation / Conference Contribution

This paper presents an objective comparative evaluation of page analysis and recognition methods for historical scientific manuscripts with text in Arabic language and script. It describes the competition (modus operandi, dataset and evaluation metho... Read More about ICFHR 2018 Competition on recognition of historical Arabic scientific manuscripts - RASM2018.

Ontology and framework for semantic labelling of document data and software methods (2018)
Presentation / Conference Contribution

We present a metadata labelling framework for datasets, software tools, and workflows. An ontology for document image analysis was developed with deep support for historical data. An accompanying open source software framework was implemented to enab... Read More about Ontology and framework for semantic labelling of document data and software methods.

ICDAR2017 Competition on Recognition of Early Indian Printed Documents – REID2017 (2017)
Presentation / Conference Contribution

This paper presents an objective comparative evaluation of page analysis and recognition methods for historical documents with text mainly in Bengali language and script. It describes the competition (modus operandi, dataset and evaluation methodolog... Read More about ICDAR2017 Competition on Recognition of Early Indian Printed Documents – REID2017.

ICDAR2017 Competition on Recognition of Documents with Complex Layouts – RDCL2017 (2017)
Presentation / Conference Contribution

This paper presents an objective comparative evaluation of page segmentation and region classification methods for documents with complex layouts. It describes the competition (modus operandi, dataset and evaluation methodology) held in the context o... Read More about ICDAR2017 Competition on Recognition of Documents with Complex Layouts – RDCL2017.

Creating a complete workflow for digitising historical census documents : considerations and evaluation (2017)
Presentation / Conference Contribution

The 1961 Census of England and Wales was the first UK census to make use of computers. However, only bound volumes and microfilm copies of printouts remain, locking a wealth of information in a form that is practically unusable for research. In this... Read More about Creating a complete workflow for digitising historical census documents : considerations and evaluation.

Unearthing the recent past : digitising and understanding statistical information from census tables (2017)
Presentation / Conference Contribution

Censuses comprise a wealth of information at a large (national) scale that allow governments (who commission them) and the public to have a detailed snapshot of how people live (geographical distribution and characteristics). In addition to underpinn... Read More about Unearthing the recent past : digitising and understanding statistical information from census tables.

Quality prediction system for large-scale digitisation workflows (2016)
Presentation / Conference Contribution

The feasibility of large-scale OCR projects can so far only be assessed by running pilot studies on subsets of the target document collections and measuring the success of different workflows based on precise ground truth, which can be very costly to... Read More about Quality prediction system for large-scale digitisation workflows.

Europeana newspapers OCR workflow evaluation (2015)
Presentation / Conference Contribution

This paper summarises the final performance evaluation results of the OCR workflow which was employed for large-scale production in the Europeana Newspapers project. It gives a detailed overview of how the involved software performed... Read More about Europeana newspapers OCR workflow evaluation.

Document representation refinement for precise region description (2014)
Presentation / Conference Contribution

Precise description of layout entities (content regions on a page) is crucial for all but the most trivial document analysis and recognition applications. The output of layout analysis methods and state-of-the-art OCR systems varies significantly, fr... Read More about Document representation refinement for precise region description.

The significance of reading order in document recognition and its evaluation (2013)
Presentation / Conference Contribution

Reading order detection and representation is an important task in many digitisation scenarios involving the preservation of the logical structure of a document. The corresponding need for the evaluation of reading order results generated by layout a... Read More about The significance of reading order in document recognition and its evaluation.

Aletheia - An advanced document layout and text ground-truthing system for production environments (2011)
Presentation / Conference Contribution

Large-scale digitisation has led to a number of new possibilities with regard to adaptive and learning based methods in the field of Document Image Analysis and OCR. For ground truth production of large corpora, however, there is still a gap in terms... Read More about Aletheia - An advanced document layout and text ground-truthing system for production environments.

Restoration of arbitrarily warped historical document images using flow lines (2011)
Presentation / Conference Contribution

Historical documents frequently suffer from
arbitrary geometric distortions (warping and folds) due to
storage conditions, use and to, some extent, the printing
process of the time. In addition, page curl can be
prominent due to the scanning tech... Read More about Restoration of arbitrarily warped historical document images using flow lines.

The PAGE (Page Analysis and Ground-Truth Elements) format framework (2010)
Presentation / Conference Contribution

There is a plethora of established and proposed document representation formats but none that can adequately support individual stages within an entire sequence of document image analysis methods (from document image enhancement to layout analysis to... Read More about The PAGE (Page Analysis and Ground-Truth Elements) format framework.

Word-Based adaptive OCR for historical books (2009)
Presentation / Conference Contribution

The aim of this work is to propose a new approach to the recognition of historical texts by providing an adaptive mechanism that automatically tunes itself to a specific book. The system is based on clustering together all the similar words in a book... Read More about Word-Based adaptive OCR for historical books.

Flexible text recovery from degraded typewritten historical documents (2006)
Presentation / Conference Contribution

Two approaches for text segmentation in web images (2003)
Presentation / Conference Contribution