Vertex Chain Code

    In this section we present a new chain code for shapes composed of regular cells. This chain code is called a vertex chain code (VCC) and was deduced by E. Bribiesca [72].

    Definition: An element ai, of a chain indicates the number of cell vertices, that are in touch with the bounding contour of the shape in that element position.

    Fig. 5.11a presents a discrete shape composed of pixels. Fig. 5.11b shows the elements of the shape presented in Fig. 5.11a. It should be noticed that when we are using pixels, there will be only three different numbers of cell vertices for the bounding contour: 1, 2, and 3 [72].