【作者】 李莉； 吕广庶； 焦永和； 董国耀；

【Author】 Li Li Lv Guang-shu Jiao Yong-he Dong Guo-yao Beijing Institute of technology

【机构】 北京理工大学；

【摘要】 金属断口表面体视图对同名点获取之后,由于所得点为一系列离散的点,需进行插值计算,从而获得更多的点信息。但经一次插值之后,直接采用这些点进行表面重构,所获表面存在尖点。为解决这一问题,采用了非均匀有理B 样条(NURBS)对曲面加以平滑逼近,获得了理想的效果。非均匀有理B 样条的几何特性具有无可比拟的优越性,当前已被广泛应用,但将之应用于金属断口的三维重建中,尚属首次。更多还原

【Abstract】 Non-Uniform Rational B-Splines(NURBS) is provided to remove the peaks existed on the surface reconstructed with the data obtained by the first interpolation. The first interpolation is applied to get more information of continuous points from the discrete matched points obtained from the pair of stereo photos of metal fracture. NURBS provide a powerful tool in Geometric modeling and have been applied widely. It is the first time that NURBS is applied in 3D reconstructing metal fracture fractal.更多还原