MESHGRID is a novel, compact, multiscalable and animation-friendly surface representation method, which has been introduced in MPEG-4 [1]. The MESHGRID representation attaches a description of the "global connectivity" between the vertices on the object's surface (i.e., the 3-D connectivity wireframe) to a regular 3-D grid of points (i.e., the reference grid). MESHGRID efficiently encodes the 3-D connectivity wireframe by using a new type of 3-D extension of Freeman chain-code. MESHGRID does not explicitly store the polygons of the surface, since the 3-D connectivity wireframe has particular connectivity properties allowing for the unambiguous derivation of the triangulation. The reference grid is a smooth vector field defined on a regular discrete 3-D space. This grid is efficiently compressed by using an embedded 3-D wavelet-based multiresolution intra-band coding algorithm. MESHGRID can be efficiently exploited for QoS since it allows for three types of scalability in both view-dependent and view-independent scenarios, including: 1) resolution scalability, i.e., the adaptation of the number of transmitted vertices 2) shape precision, i.e., the adaptive reconstruction of the reference grid positions and 3) vertex position scalability, i.e., the change of the precision of known vertex positions with respect to the reference grid. Furthermore, in addition to the classical vertex-based animation, MESHGRID also supports specific animation capabilities, such as: 1) rippling effects by changing the position of the vertices relative to corresponding reference grid points and 2) reshaping on a hierarchical basis of the regular reference grid and its attached vertices.

Salomie Ioan, A , Munteanu, A , Gavrilescu, I , Lafruit, G , Schelkens, P , Deklerck, R & Cornelis, J 2004, ' Meshgrid - A Compact, Multi-scalable and Animation-Friendly Surface Representation ', IEEE Transactions on Circuits and Systems for Video Technology , vol. 14, no. 7, pp. 950-966.

Salomie Ioan, A. , Munteanu, A. , Gavrilescu, I. , Lafruit, G. , Schelkens, P. , Deklerck, R. , & Cornelis, J. (2004). Meshgrid - A Compact, Multi-scalable and Animation-Friendly Surface Representation . IEEE Transactions on Circuits and Systems for Video Technology , 14 (7), 950-966.

@article{25712707381d4b029fc279a267f4cfe5,

title = " Meshgrid - A Compact, Multi-scalable and Animation-Friendly Surface Representation " ,

abstract = " MESHGRID is a novel, compact, multiscalable and animation-friendly surface representation method, which has been introduced in MPEG-4 [1]. The MESHGRID representation attaches a description of the { " }global connectivity{ " } between the vertices on the object's surface (i.e., the 3-D connectivity wireframe) to a regular 3-D grid of points (i.e., the reference grid). MESHGRID efficiently encodes the 3-D connectivity wireframe by using a new type of 3-D extension of Freeman chain-code. MESHGRID does not explicitly store the polygons of the surface, since the 3-D connectivity wireframe has particular connectivity properties allowing for the unambiguous derivation of the triangulation. The reference grid is a smooth vector field defined on a regular discrete 3-D space. This grid is efficiently compressed by using an embedded 3-D wavelet-based multiresolution intra-band coding algorithm. MESHGRID can be efficiently exploited for QoS since it allows for three types of scalability in both view-dependent and view-independent scenarios, including: 1) resolution scalability, i.e., the adaptation of the number of transmitted vertices 2) shape precision, i.e., the adaptive reconstruction of the reference grid positions and 3) vertex position scalability, i.e., the change of the precision of known vertex positions with respect to the reference grid. Furthermore, in addition to the classical vertex-based animation, MESHGRID also supports specific animation capabilities, such as: 1) rippling effects by changing the position of the vertices relative to corresponding reference grid points and 2) reshaping on a hierarchical basis of the regular reference grid and its attached vertices. " ,

keywords = " MeshGrid, scalable mesh coding, animation " ,

author = " {Salomie Ioan}, Alexandru and Adrian Munteanu and Ion Gavrilescu and Gauthier Lafruit and Peter Schelkens and Rudi Deklerck and Jan Cornelis " ,

note = " IEEE Transactions on Circuits and Systems for Video Technology, Vol. 14, Nr. 7, pp. 950-966. " ,

year = " 2004 " ,

month = jul,

language = " English " ,

volume = " 14 " ,

pages = " 950966 " ,

journal = " IEEE Transactions on Circuits and Systems for Video Technology " ,

issn = " 1051-8215 " ,

publisher = " Institute of Electrical and Electronics Engineers Inc. " ,

number = " 7 " ,

}