000086957 001__ 86957
000086957 005__ 20190316233744.0
000086957 037__ $$aREP_WORK
000086957 245__ $$aThe Snake Origin
000086957 269__ $$a2003
000086957 260__ $$aEcublens$$c2003
000086957 336__ $$aReports
000086957 520__ $$aActive contours (snakes) provide a unified account of a number of visual problems, including detection of edges, lines and subjective contours as well as motion tracking and stereo matching. Since their first apparition the researchers of the image processing community have simply applied this model to their problems without explaining where its parameters come from nor how to obtain its motion equations. To get a reality-based interpretation of the classic snake parameters (i.e. elasticity and bending) we propose an approach originates from the theory of the elasticity. Then we derive the motion equations from the variational method and we finally give some examples of segmentation. An alternative way of computing the external force field which increases the performance of snakes in presence of concavities is studied. We finally propose a new approach based on the dynamic modification of fi that improves the snake behavior at corners.
000086957 6531_ $$aLTS5
000086957 700__ $$aEcabert, O.
000086957 8564_ $$s326164$$uhttps://infoscience.epfl.ch/record/86957/files/Ecabert2003_1234.pdf$$zn/a
000086957 909C0 $$0252394$$pLTS5$$xU10954
000086957 909CO $$ooai:infoscience.tind.io:86957$$pSTI$$preport$$qGLOBAL_SET
000086957 937__ $$aEPFL-REPORT-86957
000086957 970__ $$aEcabert2003_1234/LTS
000086957 973__ $$aEPFL$$sPUBLISHED
000086957 980__ $$aREPORT