镜面反射
光学
计算机科学
高动态范围
调制(音乐)
漫反射
人工智能
极化(电化学)
校准
结构光三维扫描仪
反射(计算机编程)
计算机视觉
投影(关系代数)
动态范围
物理
算法
声学
化学
扫描仪
物理化学
量子力学
程序设计语言
作者
H. Huang,Fuqian Li,Chenglin Zuo,Yajun Wang
出处
期刊:Optics Express
[The Optical Society]
日期:2023-11-27
卷期号:31 (25): 41582-41582
摘要
Three-dimensional (3D) shape measurement serves an important role in many areas, and fringe projection profilometry (FPP) is a widely used 3D measurement technique due to its non-physical contact and high speed. The real measurement scenarios are often mixtures of specular and diffuse reflections, causing overexposed and underexposed areas to co-exist. Currently, utilizing FPP to simultaneously measure overexposed and underexposed areas remains a challenge. To solve this problem, we propose a mixed reflection model and what we believe to be a novel high dynamic range (HDR) 3D measurement method based on polarization and multispectrum co-modulation. In mixed reflection, the fringe images captured by the polarized color camera can be modulated to different intensities between different channels due to the co-modulation effect. By synthesizing all sub-images, high-modulation fringe images are formed and simultaneous reconstruction of overexposed and underexposed surfaces is finally achieved. Compared to conventional methods, the proposed method is more effective for measuring complex reflection situations, especially when objects with specular and diffuse surfaces simultaneously exist in the scene. And what we believe to be a novel no-registration-error calibration framework for multi-channel cameras has also been proposed, which both acquires a significant amount of information in the region with HDR problems and avoids the registration error due to the physical distances between different channels. Experiments were conducted to verify the effectiveness of the proposed method.
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