Searching for Pipes

Named Set

A set of named recognition settings that can be quickly switched.

Save Type to Class

Whether to create classes based on the detected feature types (Feature type coloring type):

·         Yes – the command will create new point classes with names corresponding to the recognized feature types and classify the cloud points.

·         No – classes will not be created. Points will not be classified.

Max Pipe Radius

The maximum radius of pipes in the drawing units for which recognition should be performed.

This parameter allows you to exclude flat areas and equipment with a large radius from the recognition process. Any plane with a certain error can be considered a part of a cylinder of a huge radius. The parameter was introduced in order to exclude flat areas of scanned surfaces from the recognition process.

Min Pipe Radius

The minimum radius of pipes in drawing units for which recognition should be performed.

Group Tolerance

The size of the conditional cell. For large clouds, the recognition time can be unacceptably long. To speed it up, the number of points under consideration is reduced by averaging the coordinates and attributes in cubic cells of the specified size. The larger the cell size, the fewer points are taken into consideration and the higher the recognition rate will be.

If value = 0, grouping is not performed (disabled).

Neighbor Count

The number of neighbors for estimating the position of the section when calculating the center point. Typical value is 50-150. The larger the value, the more accurately the position of the axes is calculated, but the longer the calculation time. It is recommended to increase the value for noisy pipes or high density of points on the pipe surface.

Slice Thickness

The thickness of the pipe section to estimate the radius and location of the pipe. Increasing this parameter increases both the accuracy of the determination and the processing time. The value should be comparable to the radius of the pipe, increasing the value too much can degrade accuracy, especially on curved segments.

Local Averaging Count

The number of neighbors specified in this parameter is taken for each point of the axis cloud. The position and direction of the pipe axis are calculated from the adjacent points.

Filtering Distance Threshold

If the potential point of the axis is at a distance greater than this parameter, it is rejected. The higher the parameter value, the more noisy the axes are. However, when this parameter tends to zero, the number of points at the output decreases, which means the probability of successful recognition. The optimal value is determined by trial and error.

Axe Threshold

Accuracy of determining the axes of pipelines. The smaller this parameter, the closer the axes are to the real position, but the larger the number of short sections approximating the real pipeline.

Surface Epsilon

Pipeline surface tolerance, which determines whether a point belongs to a pipe. The more noisy the original data, the higher the tolerance value should be.

Min Axe Size

The minimum number of axis points that make up a piping element, such as a bend or pipe section.

Delete Axis Cloud

Axis clouds are created during pipe recognition. The parameter allows you to leave such clouds in the drawing.

However, you can create pipeline routes in the form of a 3D polyline using the Creating a Pipeline Route command.