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首页> 外文期刊>Measurement Science & Technology >High-speed 3D surface profilometry employing trapezoidal phase-shifting method with multi-band calibration for colour surface reconstruction
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High-speed 3D surface profilometry employing trapezoidal phase-shifting method with multi-band calibration for colour surface reconstruction

机译：采用梯形相移方法和多波段校准的高速3D表面轮廓仪，用于彩色表面重建

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摘要

This paper presents a new optical measurement method employing a HSI (hue, saturation and intensity) colour model to form trapezoidal structured patterns for morphology reconstruction of a measured object at high speed. Profilometry on objects having non-monochromatic surfaces is considered as one of the remaining challenges most faced by the currently existing structured-light projection methods since the surface reflectivity to red, green and blue light may vary significantly. To address this, an innovative colour calibration method for a hue component is developed to determine the accurate reflectivity response of the measured surface. The trapezoidal colour pattern is calibrated to compensate the hue-shifted quantity induced by the reflective characteristics of the object's surface. The developed method can reconstruct precise 3D surface models from objects by acquiring a single-shot image, which can achieve high-speed profilometry and avoid in situ potential measurement disturbances such as environmental vibration. To verify the feasibility of the developed methodology, some experiments were conducted to confirm that the measurement accuracy can be controlled within 2.5percent of the overall measurement range and the repeatability of 3.0percent within +-3sigma can be achieved.
机译：本文提出了一种新的光学测量方法，该方法采用HSI（色相，饱和度和强度）颜色模型来形成梯形结构的图案，用于高速地重建被测物体。具有非单色表面的物体上的轮廓测量法被认为是当前存在的结构化光投影方法最面临的剩余挑战之一，因为对红，绿和蓝光的表面反射率可能发生很大变化。为了解决这个问题，开发了一种针对色相成分的创新色彩校准方法，以确定被测表面的准确反射率响应。梯形颜色图案经过校准以补偿由物体表面的反射特性引起的色相偏移量。所开发的方法可以通过获取单次图像来从对象重建精确的3D表面模型，从而可以实现高速轮廓测量并避免原位潜在的测量干扰（例如环境振动）。为了验证所开发方法的可行性，进行了一些实验以确认测量精度可以控制在整个测量范围的2.5％之内，并且可以在+ -3sigma之内实现3.0％的可重复性。

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