A Novel Human Computer Interaction Paradigm for Volume Visualization in Projection-Based Virtual Environments

摘要

We propose a novel Human Computer Interaction (HCI) paradigm for volume visualization in projection-based immersive virtual environments (Ves). This paradigm is intuitive, highly efficient and allows accurate control over the virtual objects. A fine control mode for direct manipulation is proposed to address the low accuracy problem of virtual object manipulation in Ves. An agent object interaction method is proposed to provide more flexibility in manipulating the volume objects. A two-handed scaling method is proposed to conveniently scale the volume object along one, two, or three axes. Finally, a ghost object paradigm is proposed to address the motion constraint problem for virtual objects. An implementation using a 3-state tracked glove setup as the input interface is discussed. How basic functionality for volume visualization can be transferred from the 2D WIMP (Window, Icon, Menu, and Pointer) interface to a 3D VR interface is also systematically discussed.