“…This process is known as the analysis-by-synthesis (AbS) approach. The type of data used in the matching differ between systems, but usually it is: edges (Sminchisescu, 2002); (Wu et al, 2003), texture (Sidenbladh et al, 2000); (Ben-Arie et al, 2002), contours (Ong & Gong, 1999); (Delamarre & Faugeras, 2001), silhouettes (Moeslund & Granum, 2000); (Ogaki et al, 2001), or motion (Bregler & Malik, 1998); (Howe et al, 2000). The framework used to decide which synthesised data to match with the current image data also differ.…”