Abstract. It is critical to accurately obtain a phase position in a digital fringe projection system. Due to stray light in a complex environment, when projecting an image of a code fringe, the projected light intensity can be influenced. As a result, the intensity of fringe light captured with the camera may be defective, resulting in the decline of measurement precision. Hence, we propose a strong suppression technology for stray light based on polarization. Through processing fringe images in the frequency domain, this technology can effectively suppress interference of stray light on the three-dimensional (3D) imaging system. This method is verified in the experiment. The results show that the method can accurately capture the 3D profile of real-world targets under the interference of stray light.

中文翻译：

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结构光3D成像系统杂散光强干扰抑制方法

摘要。在数字条纹投影系统中准确获得相位位置至关重要。由于复杂环境中的杂散光，在投影码边图像时，会影响投影光强。因此，相机捕捉到的条纹光强度可能存在缺陷，从而导致测量精度下降。因此，我们提出了一种基于偏振的杂散光强抑制技术。该技术通过在频域处理条纹图像，可以有效抑制杂散光对三维（3D）成像系统的干扰。该方法在实验中得到验证。结果表明，该方法能够准确捕捉到杂散光干扰下真实世界目标的3D轮廓。