Three-Dimensional Measurement Method for Tube's Endpoints Based on Multi-view Stereovision

In order to achieve the accurate measurement of pipeline's end position, a method based on centerline vector with the help of multi-vision is proposed. This method uses pictures taken by eight industrial cameras to extract the pipeline's centerline. And location of the center of end plane is determined with the aid of two data, the centerline vector and the pipeline's outer diameter. The deep learning method is used for obtaining the camera calibration matrix which is used to reconstruct the space coordinates of endpoints. The relative position of two endpoints is calculated. The measurement experiment shows that the maximum relative deviation between the measured value and the standard value of this method is 0.6%, and the method is simple and measurement efficiency is high.