Blickbasierte Interaktion mit 3D-Displays : Entwicklung eines Prototyps zur Evaluierung blickbasierter Interaktion

Maus und Tastatur sind die Eingabegeräte am Computer schlechthin. Doch es gibt noch eine Reihe weiterer Methoden, wie Menschen mit Computern interagieren können. In dieser Arbeit sollen blickbasierte Interaktionsmethoden auf 3D-Bildschirmen untersucht werden. Mithilfe eines Eyetrackers und eines 3D-Bildschirms sollen von einer Beispielapplikation bereitgestellte Aufgaben gelöst und die Performanz der unterschiedlichen Lösungsansätze gemessen und diskutiert werden. Das Konzept, die Entwicklung der Applikation, die durchgeführte Studie und die dazugehörige Evaluierung werden in dieser Arbeit besprochen. Zuletzt werden Ansätze vorgestellt, welche in Zukunft die Leistung solcher Systeme möglicherweise noch erhöhen könnten.The mouse and the keyboard are traditionally used as input devices. However, there are more methods how people can interact with computers. In this thesis, methods for gaze based interaction with 3D displays are investigated. Utilizing an eye tracker and a stereoscopic display, different tasks should be solved and the performance of the interaction methods within a prototypical application is measured. The concept, the development of the prototyp, and the evaluation are part of this thesis. Finally, some approaches are discussed that could improve the performace of such systems in the future

Capturing Culture: The Practical Application of Holographic Recording for Artefacts Selected from the Heritage and Museums of the Arabian Peninsula

Recording cultural heritage is one of the most important issues for consideration in the twenty- first century. Safeguarding, protecting and preserving heritage, through effective mechanism, is of crucial importance. Holographic technology has the potential to offer an appropriate solution to solve issues in documenting, cataloguing and replaying the original optical information of the artefact in three-dimensional imaging. This thesis investigates the relationship between art and technology through holograms recorded as part of a practice-based research programme. It questions whether the holographic medium can be used to capture and disseminate information for use in audience interaction, and therefore raise public awareness, by solving the problem of displaying the original artefacts outside the museum context. Using holographic records of such valuable items has the potential to save them from being lost or destroyed, and opens up the prospect of a new form of virtual museum. This research examines the possibility of recording valuable and priceless artefacts using a mobile holographic recording system designed for museums. To this end, historical, traditional and cultural artefacts on display in Saudi heritage museums have been selected. This project involves the recording of ancient Arabian Peninsula cultural heritage, and in particular jewellery artefacts that we perceive as three-dimensional images created, using holographic wavefront information. The research adopts both qualitative and quantitative research methods and critical review of relevant literature on the holographic medium to determine how it might provide an innovative method of engaging museums in Saudi Arabia. The findings of this research offer an original contribution to knowledge and understanding for scholars concerned with conservation of Saudi Arabia’s cultural heritage

Neuroinformatics in Functional Neuroimaging

This Ph.D. thesis proposes methods for information retrieval in functional neuroimaging through automatic computerized authority identification, and searching and cleaning in a neuroscience database. Authorities are found through cocitation analysis of the citation pattern among scientific articles. Based on data from a single scientific journal it is shown that multivariate analyses are able to determine group structure that is interpretable as particular “known ” subgroups in functional neuroimaging. Methods for text analysis are suggested that use a combination of content and links, in the form of the terms in scientific documents and scientific citations, respectively. These included context sensitive author ranking and automatic labeling of axes and groups in connection with multivariate analyses of link data. Talairach foci from the BrainMap ™ database are modeled with conditional probability density models useful for exploratory functional volumes modeling. A further application is shown with conditional outlier detection where abnormal entries in the BrainMap ™ database are spotted using kernel density modeling and the redundancy between anatomical labels and spatial Talairach coordinates. This represents a combination of simple term and spatial modeling. The specific outliers that were found in the BrainMap ™ database constituted among others: Entry errors, errors in the article and unusual terminology