This paper proposes a new fringe projection scanner that uses a dual pattern to prevent phase retrieval errors or complications. The pattern comprises two horizontal and vertical patterns, however, just one of them is involved in computing the coordinates of an object point. To define the pattern, a photometric stereo component is used to extract the geometric properties of the object. The extracted data is employed to form a decision mask, each pixel of which defines the best pattern (horizontal, vertical or both) related to one of the object points. In this way, the scanner determines which pattern to use to obtain the most accurate results. Experiments suggest not only the avoidance of phase retrieval problems, but also an increase in the accuracy of the measurements (by 56% in this test).

中文翻译：

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研发新型双图案条纹投影扫描仪

本文提出了一种新的条纹投影扫描仪，该扫描仪使用双重图案来防止相位检索错误或复杂化。该图案包括水平和垂直两个图案，但是，在计算对象点的坐标时只涉及其中之一。为了定义图案，使用光度学立体组件提取对象的几何特性。所提取的数据用于形成决策掩码，决策掩码的每个像素定义与一个目标点有关的最佳模式（水平，垂直或两者）。以这种方式，扫描仪确定使用哪种图案以获得最准确的结果。实验表明，不仅避免了相位恢复问题，而且还提高了测量精度（在该测试中提高了56 ％）。