This is the place where you will find news, update information, and research regarding simian and its progeny.



New

Coming soon


Papers


Most direct volume renderings produced today employ one dimensional transfer functions, which assign color and opacity to the volume based solely on the single scalar quantity which comprises the dataset. Though they have not received widespread attention, multi-dimensional transfer functions are a very effective way to extract specific material boundaries and convey subtle surface properties. However, identifying good transfer functions is difficult enough in one dimension, let alone two or three dimensions. This paper demonstrates an important class of three-dimensional transfer functions for scalar data (based on data value, gradient magnitude, and a second directional derivative), and describes a set of direct manipulation widgets which make specifying such transfer functions intuitive and convenient. We also describe how to use modern graphics hardware to interactively render with multi-dimensional transfer functions. The transfer functions, widgets, and hardware combine to form a powerful system for interactive volume exploration.
Interactive Volume Rendering Using Multi-Dimensional Transfer Functions and Direct Manipulation Widgets
Joe Kniss, Gordon Kindlmann, Charles Hansen
Visualization 2001 (Best Paper Award)