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content corrected; marchings cubes is a geometry-generating algorithm; although it uses (tri-linear) interpolation of pixel/voxel values, it is not an "interpolation algorithm" per se. |
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Recently, methods have been developed for thresholding computed tomography (CT) images. The key idea is that, unlike Otsu's method, the thresholds are derived from the radiographs instead of the (reconstructed) image.<ref>{{cite journal |last1 = Batenburg |first1 = K J. |last2 = Sijbers |first2 = J. |year = 2009|title = Adaptive thresholding of tomograms by projection distance minimization |journal = Pattern Recognition |volume = 42 |issue = 10 |pages = 2297–2305 |doi = 10.1016/j.patcog.2008.11.027 |bibcode = 2009PatRe..42.2297B |citeseerx = 10.1.1.182.8483 }}</ref><ref>{{cite journal |first1 = K J. |last1 = Batenburg |first2 = J. |last2 = Sijbers |title = Optimal Threshold Selection for Tomogram Segmentation by Projection Distance Minimization |journal = IEEE Transactions on Medical Imaging |volume = 28 |issue = 5 |pages = 676–686 |date = June 2009 |url = http://www.visielab.ua.ac.be/publications/optimal-threshold-selection-tomogram-segmentation-projection-distance-minimization |format = PDF |doi = 10.1109/tmi.2008.2010437 |pmid = 19272989 |s2cid = 10994501 |access-date = 2012-07-31 |archive-url = https://web.archive.org/web/20130503171943/http://www.visielab.ua.ac.be/publications/optimal-threshold-selection-tomogram-segmentation-projection-distance-minimization |archive-date = 2013-05-03 |url-status = dead }}</ref>
New methods suggested the usage of multi-dimensional fuzzy rule-based non-linear thresholds. In these works decision over each pixel's membership to a segment is based on multi-dimensional rules derived from fuzzy logic and evolutionary algorithms based on image lighting environment and application.<ref>{{cite
== Clustering methods ==
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