机构地区: 汕头大学工学院机械电子工程系
出 处: 《机械工程学报》 2000年第8期74-79,共6页
摘 要: 以特征点对应技术为基础的摄影测量术有着广泛应用,但存在着测量数据稀疏的缺陷,对此提出了SFS(Shape from shading)与特征点技术相结合的方法,加密插值点,解决复杂表面形状测量问题。首先设计了用于测量的摄像系统,然后讨论了图像平面的剖分算法,最后给出SFS与特征点技术结合的有限单元形式,并设计了多重网格加速求解算法。算例表明,该方法效果令人满意。 Measuring 3D coordinates based on poin tcorrespond ences from a set of images is useful in many fields,but it only provides a coars e depth map of the object.To obtain a dense depth map, it's a feasible way to com bine shape from shading and point correspondences.Correspondences technique is f irst used to get a coarse depth map ;then a constrained triangulation method is used to insert interpolation points in the image plane;at last,a triangle elemen t formulation is used to integrate information from SFS(shape from shading)with that from point correspondences.A multi-grid finite element method is also put forward to solve the formulation.Example shows that the method is satisfied.