Abstract: 
    
            
                    We present the preliminary results of our proposal: a region-based detection  
and tracking method of arbitrary shapes. The method is designed to be robust  
against orientation and scale changes and also occlusions. In this work, we  
study the effectiveness of sequence of shape descriptors for matching  
purpose. We detect and track surfaces by matching the sequences of descriptor  
so called relevance measures with their correspondences in the database.  
First, we extract stable shapes as the detection target using Maximally  
Stable Extreme Region (MSER) method. The keypoints on the stable shapes are  
then extracted by simplifying the outline of the stable regions. The  
relevance measures that are composed by three keypoints are then computed and  
the sequences of them are composed as descriptors. During runtime, the  
sequences of relevance measures are extracted from the captured image and are  
matched with those in the database. When a particular region is matched with  
one in the database, the orientation of the region is then estimated and  
virtual annotations can be superimposed. We apply this approach in an  
interactive task support system that helps users for creating paper craft  
objects.
        
         
 
  
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