3D positioning method for underground pipelines based on multi-point spatial line fitting and image threshold segmentation
In order to accurately grasp the distribution status and shape of underground pipelines,a three-dimensional (3D) positioning method for underground pipelines based on multi-point spatial line fitting and image threshold segmentation was studied. By using the maximum method,the transmitter was placed on a known mapping base point and connected to the pipeline,so as to perform threshold segmentation on the underground pipeline image. The underground pipeline was separated from the surrounding environment,and the image data was fitted with multi-point spatial straight lines. By fitting the direction of the underground pipeline,the pipeline direction information was obtained. Based on the position and shape of the underground pipeline,the 3D positioning of the underground pipeline was completed. The test results show that after the application of the studied method,the planar measurement errors of 10 measurement points are all less than 50 mm,and the errors in elevation (burial depth) measurement are all less than 30 mm. The accuracy of the 3D positioning method for underground pipelines based on multi-point spatial line fitting and image threshold segmentation is relatively high,and the method can accurately and efficiently obtain the location information of underground pipelines.
multi-point spatial line fittingimage threshold segmentationunderground pipelines3D positioning method
万方数据
维普
