Direct Feature Extraction of Sectional Curve Based on a Discrete Curvature Arithmetic
Xinli Chen · Journal of China University of Mining and Technology · 2009
The process of feature points extracted is important in the reverse engineering,in which the crucial question about weak feature points extracted of sectional curve needs to be solved.The discrete curvature arithmetic was used to extract feature points,which the curvature expression contains Gaussian nuclear function and chooses appropriate discrete scale factor.Based on the local extremum of one order and two orders discrete curvature,the feature points collection of sectional curve was determined and the feature points was fused.Then the final feature points collection was output.Compared with the feature point output of relevant literature,this method is not prone to slip and miss point features,and can guarantee the consistence between feature extraction results and original model feature element from the experiments.The applicability and validity of this arithmetic was validated through the results of emulation and output of an example.