Adaptive Design of a Global Opacity Transfer Function for Direct Volume Rendering of Ultrasound Data. - Dieter Hönigmann; Johannes Ruisz; Christoph Haider (IEEE Visualization, 2003)

The Isophotic Metric and Its Application to Feature Sensitive Morphology on Surfaces. - Helmut Pottmann; Tibor Steiner; Michael Hofer; Christoph Haider; Allan Hanbury (ECCV (4), 2004)