TY - GEN A1 - Wiebel, Alexander A1 - Hege, Hans-Christian A1 - Ziech, Manon A1 - Caan, Matthan A1 - Stoker, Jaap A1 - Vos, Frans T1 - DCE-MRI-oriented Volume Rendering for Monitoring of Crohn’s Disease. T2 - BioVis 2011 Abstracts, 1st IEEE Symposium on Biological Data Visualization Y1 - 2011 ER - TY - CHAP A1 - Wiebel, Alexander A1 - Preis, Philipp A1 - Vos, Frans A1 - Hege, Hans-Christian ED - Hlawitschka, Mario ED - Weinkauf, Tino T1 - 3D Strokes on Visible Structures in Direct Volume Rendering T2 - EuroVis - Short Papers Y1 - 2013 U6 - https://doi.org/10.2312/PE.EuroVisShort.EuroVisShort2013.091-095 SP - 91 EP - 95 PB - Eurographics Association ER - TY - JOUR A1 - Wiebel, Alexander A1 - Vos, Frans A1 - Foerster, David A1 - Hege, Hans-Christian T1 - WYSIWYP: What You See Is What You Pick JF - IEEE Transactions on Visualization and Computer Graphics Y1 - 2012 U6 - https://doi.org/10.1109/TVCG.2012.292 VL - 18 IS - 12 SP - 2236 EP - 2244 ER - TY - GEN A1 - Wiebel, Alexander A1 - Vos, Frans M. A1 - Hege, Hans-Christian T1 - Perception-Oriented Picking of Structures in Direct Volumetric Renderings N2 - Radiologists from all application areas are trained to read slice-based visualizations of 3D medical image data. Despite the numerous examples of sophisticated three-dimensional renderings, especially all variants of direct volume rendering, such methods are often considered not very useful by radiologists who prefer slice-based visualization. Just recently there have been attempts to bridge this gap between 2D and 3D renderings. These attempts include specialized techniques for volume picking that result in repositioning slices. In this paper, we present a new volume picking technique that, in contrast to previous work, does not require pre-segmented data or metadata. The positions picked by our method are solely based on the data itself, the transfer function and, most importantly, on the way the volumetric rendering is perceived by viewers. To demonstrate the usefulness of the proposed method we apply it for automatically repositioning slices in an abdominal MRI scan, a data set from a flow simulation and a number of other volumetric scalar fields. Furthermore we discuss how the method can be implemented in combination with various different volumetric rendering techniques. T3 - ZIB-Report - 11-45 KW - DVR KW - picking KW - pointing KW - direct volume rendering Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-14343 SN - 1438-0064 ER - TY - GEN A1 - Wiebel, Alexander A1 - Preis, Philipp A1 - Vos, Frans M. A1 - Hege, Hans-Christian T1 - Computation and Application of 3D Strokes on Visible Structures in Direct Volume Rendering N2 - In this paper we describe VisiTrace, a novel technique to draw 3D lines in 3D volume rendered images. It allows to draw strokes in the 2D space of the screen to produce 3D lines that run on top or in the center of structures actually visible in the volume rendering. It can handle structures that only shortly occlude the structure that has been visible at the starting point of the stroke and is able to ignore such structures. For this purpose a shortest path algorithm finding the optimal curve in a specially designed graph data structure is employed. We demonstrate the usefulness of the technique by applying it to MRI data from medicine and engineering, and show how the method can be used to mark or analyze structures in the example data sets, and to automatically obtain good views toward the selected structures. T3 - ZIB-Report - 13-20 KW - DVR KW - interaction Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-18070 SN - 1438-0064 ER -