Servicenavigation

Project Details

Back

Projekt Print View

Towards Standards for Three-dimensional Non-invasive Digitisation of Manuscripts

Subject Area Image and Language Processing, Computer Graphics and Visualisation, Human Computer Interaction, Ubiquitous and Wearable Computing
Measurement Systems
Term from 2020 to 2023
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 433501541
 
Final Report Year 2023

Final Report Abstract

In the course of digitization, large part of libraries’ archived documents are currently being converted into electronic formats. However, digitization is also reaching its limits. Scanning robots cannot digitize documents whose condition due to external influences prohibit a conventional, optical based processing. Our own preliminary work has shown that the three imaging techniques X-ray Computed Tomography, Phase Contrast X-ray Computed Tomography and Terahertz Imaging are suitable for providing non-invasive insights into such documents, allow the acquisition of digital imaging information and are capable to re-enable an efficient automated process to digitalize documents. In this research project, these three methods were used combinedly for the first time to examine a document and to test the feasibility of noninvasive imaging. For this purpose, a phantom consisting of realistic materials was designed. In the next step, the individual measurement methods were applied and the measurement methods were refined. X-ray CT imaging has shown to be the method of choice for 3-dimensional imaging of objects, which mainly contain metal-based inks. Investigations of the ionizing radiation did not reveal any significant aging effects on the objects-of-interest. Image processing and pattern recognition algorithms can be used to process the depth information and display the books’ sections separately so that it can be virtually browsed and read. In the field of 3D terahertz imaging, the terahertz short-pulse system in transmission configuration has shown the best characteristics. With cellulose as paper, it was even possible to make the inscription of a multi-layered book visible, which was not possible with the other papers. Therefore, the measurement method is usually limited to 2-dimensional imaging. Phase contrast or dark field imaging, on the other hand, has the potential to image inks that have no metallic constituents, where the dyes are no longer present or never were.

Publications

 
 

Additional Information

© 2025 DFG Disclaimer / Copyright / Privacy Policy

Textvergrößerung und Kontrastanpassung