【摘要】 采用十一点法计算轮廓的近似曲率 ,该算法比普通的三点法具有更强的抗噪性 .提出利用曲率差分图进行特征点识别 ,并根据曲率差分图中轮廓特征点所对应的波形特点 ,一次性将特征点识别为角点与切点 .最后 ,对特征点间的线段类型加以识别 ,并进行连接调整和圆弧的分割与融合 ,从而较精确地实现了平面轮廓的分段及识别 .更多还原

【Abstract】 A new eleven point method, which resists noise more effectively than common used three point method, is adopted to calculate the approximate curvature of planar contour. The graph of curvature difference is used to recognize all dominant points. Corner points and tangent points can be differentiated simultaneously because they have different wave shape in the graph of curvature difference. Line type between dominant points is recognized, then joint tuning, splitting and merging for arc segments are carried out. Our approach improved the preciseness in recognition and segmentation for planar contour.更多还原