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| 一种从混合表面的明暗变化恢复形状的新算法 | |
| 引用本文： | 王国珲,韩九强,张新曼,倪晋平. 一种从混合表面的明暗变化恢复形状的新算法[J]. 宇航学报, 2011, 32(5). DOI: 10.3873/j.issn.1000-1328.2011.05.023 |
| 作者姓名： | 王国珲 韩九强 张新曼 倪晋平 |
| 作者单位： | 1. 西安工业大学光电工程学院,西安,710032 2. 西安交通大学电子与信息工程学院,西安,710049 |
| 基金项目： | 国家自然科学基金，陕西省教育厅科研计划项目 |
| 摘 要： | 针对传统的混合表面形状恢复算法存在较大误差的问题,提出了一种基于透视投影的从混合表面的明暗变化恢复形状的新算法.首先,建立了一种改进的Ward反射模型来描述混合表面的反射特性,其次,采用更接近摄像机实际拍摄的透视投影方式,并且假定光源位于摄像机的光心处,构造了新模型下的图像辐照度方程,然后将该方程转化为包含物体表面深度信息的Hamilton-Jacobi偏微分方程,使用Fixed-point Iterative Sweeping方法和2D Central Hamiltonian函数逼近该微分方程的黏性解,进而得到物体表面的三维形状.与同类算法相比,新算法恢复的结果更加准确有效.合成花瓶图像的实验结果表明,与基于正交投影的算法相比,新算法恢复三维形状高度的平均误差和均方根误差均有较大幅度减少. |
| 关 键 词： | 从明暗恢复形状 混合表面 透视投影 黏性解 |
A New Shape from Shading Algorithm for Hybrid Surfaces |
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| WANG Guo-hui,HAN Jiu-qiang,ZHANG Xin-man,NI Jin -ping. A New Shape from Shading Algorithm for Hybrid Surfaces[J]. Journal of Astronautics, 2011, 32(5). DOI: 10.3873/j.issn.1000-1328.2011.05.023 | |
| Authors: | WANG Guo-hui HAN Jiu-qiang ZHANG Xin-man NI Jin -ping |
| Affiliation: | WANG Guo-hui1,HAN Jiu-qiang2,ZHANG Xin-man2,NI Jin-ping1(1.School of Optoelectronic Engineering,Xi'an Technological University,Xi'an 710032,China,2.School of Electronics and Information Engineering,Xi'an Jiaotong University,Xi'an 710049,China) |
| Abstract: | In the light of the high error of traditional shape from shading(SFS) algorithms of hybrid surfaces,a new SFS algorithm for hybrid surfaces based on perspective projection is proposed.First,an improved Ward reflectance model is applied to describe the hybrid surfaces and the perspective projection is used to model the camera.Assuming that the light source is located at the optical center of the camera,the image irradiance equation is established for this model.Then the equation is transformed into the Hamil... |
| Keywords: | Shape from shading Hybrid surfaces Perspective projection Viscosity solution |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |