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《Journal of Data Acquisition & Processing》 2005-01
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Polygonal Approximation of Digitized Curves Based on Uniqueness Wavelet Descriptor

ZHOU Zheng-dong, ZHANG Pin-zheng, SHU Hua-zhong ZHOU Wei-ping, LI Song-yi, YU Wen-xue (Department of Bimedical Engineering, Southeast University, Nanjing 210096, China)  
A new polygonal approximation method based on the uniqueness wavelet descriptor (UWD) is studied. Firstly, the 1-D periodic signal function of the polygon is obtained, then the differences are calculated between the UWD of the initial contour and those of the approximated polygons with one less vertice, the one with minimum difference is chosen as the appro-ximated polygon, thus a sequence of polygons with different number of vertices is output. By applying the procedure to some digital curves promising results are obtained. Compared with the known methods, such as area based method and Legendre moment based method, experimental results demonstrate that the UWD based algorithm gives better results.
【CateGory Index】: TP391.4
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