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Biomedical Engineering and Bioengineering Commons™
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Full-Text Articles in Biomedical Engineering and Bioengineering
Shape Complexes: The Intersection Of Label Orderings And Star Convexity Constraints In Continuous Max-Flow Medical Image Segmentation., John S H Baxter, Jiro Inoue, Maria Drangova, Terry M Peters
Shape Complexes: The Intersection Of Label Orderings And Star Convexity Constraints In Continuous Max-Flow Medical Image Segmentation., John S H Baxter, Jiro Inoue, Maria Drangova, Terry M Peters
Robarts Imaging Publications
Optimization-based segmentation approaches deriving from discrete graph-cuts and continuous max-flow have become increasingly nuanced, allowing for topological and geometric constraints on the resulting segmentation while retaining global optimality. However, these two considerations, topological and geometric, have yet to be combined in a unified manner. The concept of "shape complexes," which combine geodesic star convexity with extendable continuous max-flow solvers, is presented. These shape complexes allow more complicated shapes to be created through the use of multiple labels and super-labels, with geodesic star convexity governed by a topological ordering. These problems can be optimized using extendable continuous max-flow solvers. Previous approaches …
Optimization-Based Interactive Segmentation Interface For Multiregion Problems., John S H Baxter, Martin Rajchl, Terry M Peters, Elvis C S Chen
Optimization-Based Interactive Segmentation Interface For Multiregion Problems., John S H Baxter, Martin Rajchl, Terry M Peters, Elvis C S Chen
Robarts Imaging Publications
Interactive segmentation is becoming of increasing interest to the medical imaging community in that it combines the positive aspects of both manual and automated segmentation. However, general-purpose tools have been lacking in terms of segmenting multiple regions simultaneously with a high degree of coupling between groups of labels. Hierarchical max-flow segmentation has taken advantage of this coupling for individual applications, but until recently, these algorithms were constrained to a particular hierarchy and could not be considered general-purpose. In a generalized form, the hierarchy for any given segmentation problem is specified in run-time, allowing different hierarchies to be quickly explored. We …