不连续性分类
光学
结构光三维扫描仪
仿形(计算机编程)
轮廓仪
结构光
投影(关系代数)
计算机科学
人工智能
计算机视觉
算法
物理
数学
数学分析
扫描仪
操作系统
表面粗糙度
量子力学
作者
Jagadeesh Mandapalli,Vaishnavi Ravi,Sai Siva Gorthi,Subrahmanyam Gorthi,Rama Krishna Sai Subrahmanyam Gorthi
摘要
Fringe projection profilometry (FPP) is a widely used non-contact optical method for 3D profiling of objects. The commonly used linear fringe pattern in FPP has periodic intensity variations along the lateral direction. As a result, the linear fringe pattern used in FPP cannot uniquely represent the lateral shift induced by the objects having surface discontinuities. Thus, unambiguous surface profiling of objects, especially with surface discontinuities, using a single linear fringe image having a single fringe frequency, is unfeasible. This paper proposes using a radially symmetric circular fringe pattern as the structured light pattern for accurate unambiguous surface profiling of sudden height-discontinuous objects. To the best of our knowledge, this is the only method that can reconstruct discontinuous height profiles with the help of a single fringe image having a single frequency. The performance of the proposed algorithm is evaluated on several synthetic and real objects having smooth variations and discontinuities. Compared to the well-known fringe projection methods, the results depict that for a tolerable range of error, the proposed method can be applied for the reconstruction of objects with 4 times higher dynamic range and even at much lower fringe frequencies.
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