Efficient real-time contour matching

In this paper we present certain shape descriptors from the literature that enable real-time contour matching. We propose slight modifications to these descriptors and more importantly provide fast and efficient matching techniques that return distances between shapes in the order of milliseconds. We show that applying these instead of more time consuming matching algorithms matching accuracy remains the same but the speed is at least 10 times faster. We show results on the MPEG7 benchmark. Using our matching we improve some scores from the literature, this is mainly due to the aligning of the shapes and the usage of the L1 metric.