1. Method comprising encoding of a mesh representing an image of a moving sequence, wherein said mesh is larger in size than said image, and associating at least one of the following markers with at least certain of the vertices and/or certain of the faces of said mesh: an “internal” marker, one face carrying an “internal” marker if it has a non-vacant intersection with said image, and one vertex carrying an “internal” marker if it belongs to an “internal” face; an “entering” marker, one vertex carrying an “entering” marker if it carries an “internal” marker and if it is external to the image, and one face carrying an “entering” marker if at least one of the three vertices that it connects carries an “entering” marker.