Textual description of shapes

– Part-based methods where silhouette is decomposed into parts. Different criterions have been proposed: limb and neck [32], optimization of the convexity of all parts [27] and morphology criteria [21, 26]. In [36] shape is decomposed into union of meaningful convex subparts by a recursive scheme. The shape of each subpart is approximated by a morphological dilatation of basic structuring elements. Constrained morphological which recursively performs decomposition scheme for shapes is used in [14]