PDF(Pubmed)
Abstract：
Due to the advantages of simple construction, easy application and good environmental suitability, handheld structured-light measurement systems have broad application prospects in 3D measurements. Here, a monocular-vision-guided line-structured-light measurement system is developed, and the posture of the handheld device can be obtained via a specifically designed target attached to it. No more marker points need to be adhered onto the object under inspection. The key for the system calibration is to obtain the coordinate transformation matrix from the sensor to the featured target coordinate system. The mathematical model of the system is first established. Then, an improved multi-view calibration method is proposed, where a selection process for the image pairs is conducted for accuracy improvement. With this method, the maximum relative error of the measured stair heights can be reduced from 0.48% to 0.16%. The measurement results for the specific parts further verified the effectiveness of the proposed system and the calibration method.
摘要：
由于结构简单的优点，易于应用和良好的环境适应性，手持式结构光测量系统在三维测量中具有广阔的应用前景。这里,开发了单目视觉引导的线结构光测量系统，并且手持设备的姿势可以通过附着在其上的专门设计的目标来获得。不再需要将标记点粘附到被检查的物体上。系统标定的关键是获取传感器到特征目标坐标系的坐标变换矩阵。首先建立了系统的数学模型。然后，提出了一种改进的多视角标定方法,其中进行图像对的选择过程以提高精度。使用这种方法，测量的楼梯高度的最大相对误差可以从0.48%降低到0.16%。具体零件的测量结果进一步验证了所提系统和标定方法的有效性。
