Affine Invariant Feature Extraction Based on Affine Geometry
利用仿射几何特性提取图像中的仿射不变特征

A new affine invariant feature extraction method based on the affine geometry property is presented in the paper.New conceptions named Extended Centroid(EC) and Affine Region Cutting(ARC) are firstly introduced.A series of ECs are then extracted by iterative ARC,and invariant features are constructed from the ratio of the area of the triangle which are formed with ECs.Compared with other affine invariant techniques,the ECARC based method shows good performance in computational complexity and stability to the illumination and 3D rotation in certain range.