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Issue No.06 - November/December (2010 vol.16)
pp: 1358-1365
Jörg-Stefan Praßni , University of Münster
Timo Ropinski , University of Münster
Klaus Hinrichs , University of Münster
Although direct volume rendering is established as a powerful tool for the visualization of volumetric data, efficient and reliable feature detection is still an open topic. Usually, a tradeoff between fast but imprecise classification schemes and accurate but time-consuming segmentation techniques has to be made. Furthermore, the issue of uncertainty introduced with the feature detection process is completely neglected by the majority of existing approaches.In this paper we propose a guided probabilistic volume segmentation approach that focuses on the minimization of uncertainty. In an iterative process, our system continuously assesses uncertainty of a random walker-based segmentation in order to detect regions with high ambiguity, to which the user's attention is directed to support the correction of potential misclassifications. This reduces the risk of critical segmentation errors and ensures that information about the segmentation's reliability is conveyed to the user in a dependable way. In order to improve the efficiency of the segmentation process, our technique does not only take into account the volume data to be segmented, but also enables the user to incorporate classification information. An interactive workflow has been achieved by implementing the presented system on the GPU using the OpenCL API. Our results obtained for several medical data sets of different modalities, including brain MRI and abdominal CT, demonstrate the reliability and efficiency of our approach.
volume segmentation, uncertainty, classification, random walker
Jörg-Stefan Praßni, Timo Ropinski, Klaus Hinrichs, "Uncertainty-Aware Guided Volume Segmentation", IEEE Transactions on Visualization & Computer Graphics, vol.16, no. 6, pp. 1358-1365, November/December 2010, doi:10.1109/TVCG.2010.208
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