An algorithm of extracting feature points in curve based on the curvature
Donghai Zhang · Cehui kexue · 2013
This paper proposed to organize the curves by bend tree,select bends through the level of the bend tree,and detect the feature points in the corresponding selected bends.On the one hand,the macro-curvature which is calculated by the macroscopic camber of the curve was used as the criterion to evaluate the feature points roughly.On the other hand,the micro-curvature was used to determine the exact feature points around the rough ones.Comparison experiments showed that some of the feature points extracted by Douglas-Peucker algorithm were not the real feature points,and a number of the feature points extracted by traditional curvature algorithms were unwanted,and may cause unnecessary trembles in the curve,while the feature points extracted by the proposed algorithm could avoid those above defects.