最佳视角3-D激光扫描路径的自动确定方法

在3-D激光自动扫描测量中,传感器测量视角的选择直接影响测量数据的完整性和准确性。该文提出了背影轮廓法和凸包法相结合的最佳视角确定方法。利用背光板得到不同角度被测物的背影轮廓图像,根据背影轮廓法得到被测物体的粗略表面数据。以表面数据的凸包多边形作为线结构光传感器的扫描路径,改变传感器的测量视角,完成对被测物的自动扫描。实验结果表明:该方法适用于复杂外形表面的扫描,能够得到完整准确的表面3-D数据。

Automatic best viewpoint determination method for 3-D laser scanning

A next best view(NBV) determination method was developed based on the combination of the shape from the silhouette method and the convex hull algorithm to ensure integrated and accurate results in 3-D laser scanning.A backlight board was used to illuminate the scene to acquire silhouettes in various directions to measure the model.The scanning path is determined by the convex hull of the model to provide automatic scanning while changing the sensor viewpoint.Experimental results show that the method can be used to scan an object with complex surfaces to provide accurate 3-D surface data.