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Special attention has been drawn to complex natural (indoor and outdoor) sequences, where temporal clutter, abrupt motion and external lighting changes are crucial for the accuracy of the results, also focusing on the ability of the proposed approach to handle specific HCI problems, such as face and facial feature tracking. A variety of image sequences are used to illustrate the method's capability, providing theoretical explanation as well as experimental verification in specific tracking problems. <\/jats:p>","DOI":"10.1142\/s0219467804001518","type":"journal-article","created":{"date-parts":[[2004,7,9]],"date-time":"2004-07-09T08:53:32Z","timestamp":1089363212000},"page":"469-498","source":"Crossref","is-referenced-by-count":5,"title":["PROBABILISTIC BOUNDARY-BASED CONTOUR TRACKING WITH SNAKES IN NATURAL CLUTTERED VIDEO SEQUENCES"],"prefix":"10.1142","volume":"04","author":[{"given":"GABRIEL","family":"TSECHPENAKIS","sequence":"first","affiliation":[{"name":"School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou, 15773 Athens, Greece"}]},{"given":"NICOLAS","family":"TSAPATSOULIS","sequence":"additional","affiliation":[{"name":"School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou, 15773 Athens, Greece"}]},{"given":"STEFANOS","family":"KOLLIAS","sequence":"additional","affiliation":[{"name":"School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou, 15773 Athens, Greece"}]}],"member":"219","published-online":{"date-parts":[[2011,11,20]]},"reference":[{"key":"rf1","doi-asserted-by":"publisher","DOI":"10.1007\/PL00013272"},{"key":"rf3","first-page":"75","volume":"63","author":"Black M. 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