DaZaun

Chair for Computer Aided Medical Procedures & Augmented Reality
Lehrstuhl für Informatikanwendungen in der Medizin & Augmented Reality

Calibration of Virtual Cameras for Augmented Reality

Bearbeiter: Bernhard Zaun
Aufgabensteller: Prof. Gudrun Klinker Ph.D.
Betreuer: Martin Bauer
Abgabedatum: 15.07.2003

Abstract

AugmentedReality (AR) is an emerging technology which superimposes the view of the real world by additional virtual computer generated objects. Usually this is done by visual enhancement of the real world screened onto a head mounted display (HMD). In contrast to virtual reality (VR), where the user acts in an entirely virtual world, AugmentedReality merges the real and virtual objects simultaneously in real time. Therefore, the virtual environment has to be exactly mapped onto the real world and thus specific parameters for this mapping need to be estimated. This process is referred to as calibration.

In this thesis different calibration techniques for AugmentedReality applications are evaluated. Hence techniques for spatial registration of visual output devices, the tracking system, and tracked objects are considered. This work focuses on the calibration of output devices. An AugmentedReality system should be designed as a dynamically configurable system i.e. a system which is able to connect new objects such as output devices on demand. Thus new user friendly methods need to be developed to achieve satisfiable calibration results instantly in an intuitive way. In this thesis, methods allowing any user without knowledge about calibration procedures to perform the calibration task without imposing a great burden on him or her have been evaluated and integrated. I developed a calibration component integrated in the DWARF framework and demonstrated it within the ProjectArchie. The ProjectArchie project's goal was to evaluate the possibilities of AugmentedReality for architectural planning. The resulting calibration method provides a recalibration possibility for the output devices of multiple users for any application based on DWARF.

More Information


ProjectForm
Title: Calibration of Virtual Cameras for Augmented Reality
Abstract: In this thesis different calibration techniques for AugmentedReality applications are evaluated. Hence techniques for spatial registration of visual output devices, the tracking system, and tracked objects are considered. This work focuses on the calibration of output devices. An AugmentedReality system should be designed as a dynamically configurable system i.e. a system which is able to connect new objects such as output devices on demand. Thus new user friendly methods need to be developed to achieve satisfiable calibration results instantly in an intuitive way. In this thesis, methods allowing any user without knowledge about calibration procedures to perform the calibration task without imposing a great burden on him or her have been evaluated and integrated. I developed a calibration component integrated in the DWARF framework and demonstrated it within the ProjectArchie. The ProjectArchie project's goal was to evaluate the possibilities of AugmentedReality for architectural planning. The resulting calibration method provides a recalibration possibility for the output devices of multiple users for any application based on DWARF.
Student: Bernhard Zaun
Director: Gudrun Klinker
Supervisor: Martin Bauer
Type: Diploma Thesis
Status: finished
Start: 2003/01/15
Finish: 2003/07/15


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