This thesis analyzes the problem of acquiring stereoscopic images in all gazing directions
around a reference viewpoint in space with the purpose of creating stereoscopic panoramas
of non-static scenes. The generation of immersive stereoscopic imagery suitable to stimulate
human stereopsis requires images from two distinct viewpoints with horizontal parallax in
all gazing directions, or to be able to simulate this situation in the generated imagery. The
available techniques to produce omnistereoscopic imagery for human viewing are not suitable
to capture dynamic scenes stereoscopically. This is a not trivial problem when considering
acquiring the entire scene at once while avoiding self-occlusion between multiple cameras.
In this thesis, the term omnidirectional refers to all possible gazing directions in azimuth
and a limited set of directions in elevation. The acquisition of dynamic scenes restricts the
problem to those techniques suitable for collecting in one simultaneous exposure all the necessary visual information to recreate stereoscopic imagery in arbitrary gazing directions.
The analysis of the problem starts by defining an omnistereoscopic viewing model for
the physical magnitude to be measured by a panoramic image sensor intended to produce
stereoscopic imagery for human viewing. Based on this model, a novel acquisition model is
proposed, which is suitable to describe the omnistereoscopic techniques based on horizontal stereo. From this acquisition model, an acquisition method based on multiple cameras
combined with the rendering by mosaicking of partially overlapped stereoscopic images is
identified as a good candidate to produce omnistereoscopic imagery of dynamic scenes.
Experimental acquisition and rendering tests were performed for different multiple-camera
configurations. Furthermore, a mosaicking criterion between partially overlapped stereoscopic
images based on the continuity of the perceived depth and the prediction of the location and
magnitude of unwanted vertical disparities in the final stereoscopic panorama are two main
contributions of this thesis. In addition, two novel omnistereoscopic acquisition and rendering
techniques were introduced.
The main contributions to this field are to propose a general model for the acquisition of
omnistereoscopic imagery, to devise novel methods to produce omnistereoscopic imagery, and
more importantly, to contribute to the awareness of the problem of acquiring dynamic scenes
within the scope of omnistereoscopic research.
| Identifer | oai:union.ndltd.org:uottawa.ca/oai:ruor.uottawa.ca:10393/30923 |
| Date | January 2014 |
| Creators | Gurrieri, Luis E. |
| Contributors | Dubois, Eric |
| Publisher | Université d'Ottawa / University of Ottawa |
| Source Sets | Université d’Ottawa |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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