An Improved Model of Snakes for Model-Based Segmentation

The main advantage of segmentation by snakes consists in its ability to incorporate smoothness constraints on the detected shapes that can occur. Likewise, we propose to model snakes with other properties that reeect the information provided about the object of interest in a diierent extent. We consider diierent kinds of snakes, those searching for contours with a certain direction, those preserving an object's model, those seeking for symmetry, those expanding open, etc. The availability of such a collection of snakes allows not only the more complete use of the knowledge about the segmented object, but also to solve some problems of the existing snakes. Our experiments on segmentation of facial features justify the usefulness of snakes with diierent properties.