摘要
为了提高基于光度立体法的物体三维表面重建精度,研究了几种常用三维表面重建算法的适用范围。介绍了几种常用重建算法(变分法、金字塔法、代数法)的基本原理及求解方法,指出了表面方向梯度的求解准确度是三维表面重建过程中的难点。在此基础上建立了朗伯半球体模型和实际拍摄的玻璃灯罩,从重建速度、重建精度等方面对几种算法进行了比较和评价。最后通过实验模拟和算法性能评价,表明了常用算法的重建精确度有限,并且对三维重建今后的研究进行了展望。
To improve the reconstruction accuracy of 3D surface based on photometric stereo,the applicability of some general reconstruction algorithms is studied.Firstly,some general reconstruction algorithms including variational method,pyramid method and algebraic method with an emphasis on their principles and implementation are reviewed.It is pointed out that the difficulty in 3D surface reconstruction is to solve the surface orientation accurately,and the lambertian hemisphere model and glass lampshade are constructed.Then these reconstruction algorithms are evaluated in terms of reconstruction effectiveness and accuracy.Finally by the simulation experiment and performance evaluation about reconstruction algorithms,the limited reconstruction accuracy of these reconstruction algorithms is demonstrated and the future work is pointed out correspondingly.
出处
《计算机工程与设计》
CSCD
北大核心
2010年第16期3635-3639,共5页
Computer Engineering and Design
基金
国家自然科学基金项目(60872116)
关键词
光度立体技术
变分法
金字塔法
代数法
重建精度
表面方向梯度
photometric stereo
variational method
pyramid method
algebraic method
reconstruction accuracy
surface orientation
