Real-time occluded object matching using the DWT on a BDFA

Matching of occluded objects is a difficult problem. Moreover, the real-time matching problem is considerable. Real-time implementation is very important in industrial automation. In the paper, the authors propose using the discrete wavelet transform (DWT) of a boundary to obtain a reduced resolution representation in real-time with the BDFA paradigm. The existing image representation approaches are not effective for real-time occluded object matching since they use a large number of data points. The authors propose a new boundary representation which is generated by locating zero-crossings of the curvature function of boundaries at only the maximum scales where the number of zero-crossings is consistent with the original scale. The proposed representation reduces the number of points in the boundary representation and is appropriate for real-time matching in the presence of occlusion