An efficient perspective projection using VolumePro(TM) hardware

초록

VolumePro is a real-time volume rendering hardware for consumer PCs. It cannot be used for the applications requiring perspective projection such as virtual endoscopy since it provides only orthographic projection. Several methods have been proposed to approximate perspective projection by decomposing a volume into slabs and applying successive orthographic projection to them. However it takes a lot of time since entire region of every slab should be processed, which does not contribute to final image. In this paper, we propose an efficient perspective projection method that makes the use of several subvolumes with cropping feature of VolumePro. It reduces the rendering time in comparison to slab-based method without image quality deterioration since it processes only the parts contained in the view frustum.