In his dissertation, Tim Dolereit addressed the topic of underwater stereo camera calibration. When two cameras take pictures from different angles at the same time, they can be used afterward to obtain valuable 3D information from the captured scene. This requires all necessary parameters to be defined exactly. This calibration is especially important for underwater cameras: Underwater housings protect the camera’s sensitive technology, which means additional housing parameters need to be calibrated in addition to configuring the camera itself. When an underwater stereo camera is calibrated exactly, the incoming light can be calculated precisely to take refraction into account and obtain 3D data. Dolereit‘s work forms the basis for a variety of potential uses involving generating 3D models or estimating distances. The obtained 3D data can, for example, make it possible to digitize archeological sites, measure undersea creatures or identify biomass, or even for the navigation of autonomous underwater vehicles. Dolereit used both actual and simulated test data to evaluate his results.
The public defense of Dolereit’s dissertation, “A Virtual Object Point Model for the Calibration of Underwater Stereo Cameras to Recover Accurate 3D Information”, took place on September 26, 2018 at Fraunhofer IGD in Rostock. His advisers were Prof. Bodo Urban and Prof. Uwe Freiherr von Lukas from the University of Rostock as well as Prof. Reinhard Koch from Kiel University.