We then add a double mirror system in order to create similar geometry for both X-ray and optical imaging systems. This introduces a new visualization tool and reduces the X-ray exposure to both patient and physician. In particular, we present a software called CyliCon for 3D reconstruction and AR applications in industrial environment. Proceeding of the Second International Conference on Medical Image Computing and Computer-Assisted Intervention, Cambridge, England, September 1999. IEEE International Workshop on Augmented Reality, San Francisco, CA, USA, October 1999.
Visibility problems are central to many computer graphics applications.
The most common examples include hidden-part removal for view computation, shadow boundaries, mutual visibility of pairs of points, etc. In this document, we first present a theoretical study of 3D visibility properties in the space of light rays. We simplify this structure into a graph in line-space which we call the visibility skeleton. Visual events are the arcs of this graph, and our construction algorithm avoids the intricate treatment of the corresponding 1D sets of lines. Our implementation shows that the skeleton is more general, more efficient and more robust than previous techniques.