@misc{WiebelHegeZiechetal.2011, author = {Wiebel, Alexander and Hege, Hans-Christian and Ziech, Manon and Caan, Matthan and Stoker, Jaap and Vos, Frans}, title = {DCE-MRI-oriented Volume Rendering for Monitoring of Crohn's Disease.}, series = {BioVis 2011 Abstracts, 1st IEEE Symposium on Biological Data Visualization}, journal = {BioVis 2011 Abstracts, 1st IEEE Symposium on Biological Data Visualization}, year = {2011}, language = {en} } @article{WiebelVosFoersteretal.2012, author = {Wiebel, Alexander and Vos, Frans and Foerster, David and Hege, Hans-Christian}, title = {WYSIWYP: What You See Is What You Pick}, series = {IEEE Transactions on Visualization and Computer Graphics}, volume = {18}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = {12}, doi = {10.1109/TVCG.2012.292}, pages = {2236 -- 2244}, year = {2012}, language = {en} } @inproceedings{StoppelHegeWiebel, author = {Stoppel, Sergej and Hege, Hans-Christian and Wiebel, Alexander}, title = {Visibility-driven depth determination of surface patches in direct volume rendering}, series = {EuroVis - Short Papers 2014}, booktitle = {EuroVis - Short Papers 2014}, doi = {10.2312/eurovisshort.20141164}, pages = {97 -- 101}, abstract = {This paper presents an algorithm called surfseek for selecting surfaces on the most visible features in direct volume rendering (DVR). The algorithm is based on a previously published technique (WYSIWYP) for picking 3D locations in DVR. The new algorithm projects a surface patch on the DVR image, consisting of multiple rays. For each ray the algorithm uses WYSIWYP or a variant of it to find the candidates for the most visible locations along the ray. Using these candidates the algorithm constructs a graph and computes a minimum cut on this graph. The minimum cut represents a visible and typically rather smooth surface. In the last step the selected surface is displayed. We provide examples for results using artificially generated and real-world data sets.}, language = {en} } @misc{WiebelVosHege, author = {Wiebel, Alexander and Vos, Frans M. and Hege, Hans-Christian}, title = {Perception-Oriented Picking of Structures in Direct Volumetric Renderings}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-14343}, number = {11-45}, abstract = {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.}, language = {en} }