Patent ID: 6028964
Filing Date: 2000-02-22
Classification: G06T,H04N

Abstract:
A method for encoding an image frame including L objects in an input image signal, L being a non-negative integer, comprising the steps of:(a) extracting L contours of the L objects;(b) selecting a set of vertices which fits each contour;(c) determining an initial vertex of each contour in said set of vertices;(d) grouping the L contours into at most L groups of contours according to a predetermined criterion;(e) selecting a first initial vertex among the initial vertices of the contours included in each group of contours;(f) encoding absolute addresses of the first initial vertices of all the groups of contours, the absolute address of a vertex representing position of the vertex in the image frame;(g) encoding displacements of the rest of the initial vertices for all the group of contours, wherein a displacement of an initial vertex is calculated with respect to a preceding initial vertex; and(h) rendering the encoded absolute addresses and the displacements as encoded initial vertex data.