A dual-projector three-dimensional measurement model for shading problem of micro-scale object complex surface

IF 1.2 4区 物理与天体物理 Q4 OPTICS
Cheng Gui, Huikai Zhong, Yanjun Fu, Kejun Zhong, Baiheng Ma, Zhanjun Yan
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引用次数: 0

Abstract

Considering the inherent defects of the traditional triangulation method, always a shadow area is produced in the image collected by the camera. In this work, based on the traditional monocular vision measurement system, an auxiliary light source was added to alleviate the shadow problem. Two symmetrical digital light processing (DLP) projectors were also employed to project the modulated monochrome red fringe patterns and the monochrome blue fringe patterns onto the object, whereas the distorted fringe patterns were captured by the colour camera. The image collected by the colour camera was separated, whereas the deformation fringe information of the measured object was obtained in the red channel and blue channel, respectively. Fusion of red and blue channels information to eliminate measurement shadows. From the experimental results, the root mean square error (RMSE) of the system was about 6µm, and this method can effectively solve the shadow problem in small object measurement.
微尺度物体复杂表面阴影问题的双投影三维测量模型
由于传统三角剖分方法存在固有缺陷,相机采集到的图像中总会产生阴影区域。在传统的单目视觉测量系统的基础上,增加了辅助光源来缓解阴影问题。利用两个对称的数字光处理(DLP)投影仪将调制后的单色红色条纹和单色蓝色条纹投影到物体上,而扭曲的条纹则由彩色相机捕捉。对彩色相机采集的图像进行分离,在红色通道和蓝色通道中分别获得被测物体的变形条纹信息。融合红蓝通道信息,消除测量阴影。从实验结果来看,系统的均方根误差(RMSE)约为6µm,该方法可以有效地解决小物体测量中的阴影问题。
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来源期刊
Journal of Modern Optics
Journal of Modern Optics 物理-光学
CiteScore
2.90
自引率
0.00%
发文量
90
审稿时长
2.6 months
期刊介绍: The journal (under its former title Optica Acta) was founded in 1953 - some years before the advent of the laser - as an international journal of optics. Since then optical research has changed greatly; fresh areas of inquiry have been explored, different techniques have been employed and the range of application has greatly increased. The journal has continued to reflect these advances as part of its steadily widening scope. Journal of Modern Optics aims to publish original and timely contributions to optical knowledge from educational institutions, government establishments and industrial R&D groups world-wide. The whole field of classical and quantum optics is covered. Papers may deal with the applications of fundamentals of modern optics, considering both experimental and theoretical aspects of contemporary research. In addition to regular papers, there are topical and tutorial reviews, and special issues on highlighted areas. All manuscript submissions are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. General topics covered include: • Optical and photonic materials (inc. metamaterials) • Plasmonics and nanophotonics • Quantum optics (inc. quantum information) • Optical instrumentation and technology (inc. detectors, metrology, sensors, lasers) • Coherence, propagation, polarization and manipulation (classical optics) • Scattering and holography (diffractive optics) • Optical fibres and optical communications (inc. integrated optics, amplifiers) • Vision science and applications • Medical and biomedical optics • Nonlinear and ultrafast optics (inc. harmonic generation, multiphoton spectroscopy) • Imaging and Image processing
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