1 research outputs found
Perceptually driven stereoscopic camera control in 3D virtual environments
Ankara : The Department of Computer Engineering and the Graduate School of Engineering and Science of Bilkent University, 2013.Thesis (Master's) -- Bilkent University, 2013.Includes bibliographical references leaves 56-59.Depth notion and how to perceive depth have long been studied in the eld
of psychology, physiology, and even art. Human visual perception enables to
perceive spatial layout of the outside world by using visual depth cues. Binocular
disparity among these depth cues, is based on the separation between two di erent
views that are observed by two eyes. Disparity concept constitutes the base of
the construction of the stereoscopic vision.
Emerging technologies try to replicate binocular disparity principles in order
to provide 3D illusion and stereoscopic vision. However, the complexity of
applying the underlying principles of 3D perception, confronted researchers the
problem of wrongly produced stereoscopic contents. It is still a great challenge
to give realistic but also comfortable 3D experience.
In this work, we present a camera control mechanism: a novel approach for disparity
control and a model for path generation. We try to address the challenges of
stereoscopic 3D production by presenting comfortable viewing experience to users.
Therefore, our disparity system approaches the accommodation/convergence con-
ict problem, which is the most known issue that causes visual fatigue in stereo
systems, by taking objects' importance into consideration. Stereo camera parameters
are calculated automatically with an optimization process. In the second
part of our control mechanism, the camera path is constructed for a given 3D
environment and scene elements. Moving around important regions of objects is
a desired scene exploration task. In this respect, object saliencies are used for
viewpoint selection around scene elements. Path structure is generated by using
linked B ezier curves which assures to pass through pre-determined viewpoints.
Though there is considerable amount of research found in the eld of stereo
creation, we believe that approaching this problem from scene content aspect provides a uniquely promising experience. We validate our assumption with user
studies in which our method and existing two other disparity control models are
compared. The study results show that our method shows superior results in
quality, depth, and comfort.Kevinç, Elif BengüM.S