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In this paper a new technique for segmenting and tracking moving objects in a user-defined control area is presented. It is based on an active contours technique called Pixel-Level Snakes (PLS) whose capabilities to manage changes of contour topology and to introduce additional constraints in the contour evolution are used to define a control area as well as to segment and track moving objects. Furthermore, PLS can reach a very high speed of response when they are implemented on adoi:10.1109/iscas.2008.4541739 dblp:conf/iscas/VilarinoDC08 fatcat:rh3w2rn62nby3n5ic577a6ymnm