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《Geotechnical Investigation & Surveying》 2015-11
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Analysis of the smoothness of Vondrak filter

Chen Qing;Wu Yunyun;Xingzi County Land Resources Bureau;Xingzi County Construction Planning Bureau;  
This paper studies the smoothness of the criteria functions for Vondrak filter. The reason of using the square sum of the third-order finite difference as the smoothness is explained. Curvature of the filter curve is continuous in low smoothness and without breakpoint and sharp point. At last,real examples are given to demonstrate that Vondrak filter can be used as a good digital filter to separate the signal and noise successfully.
【CateGory Index】: P207
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