Current Help System: PC-DMIS Laser (View Core Help)

### Pointcloud/CAD Alignment Dialog Box Description

Pointcloud/CAD Alignment dialog box

ID: This displays the identification label for the alignment.

COP: This list lets you choose the cloud of points to use in the alignment.

Auto: This area lets you automatically align the CAD with the cloud of points by using the Compute button.

Pointcloud/CAD Pairs: This area lets you create a rough alignment based on selected points from the CAD that correspond to selected points from the pointcloud. Once you have the needed pairs selected, you can use the Compute button to perform the rough alignment.

Refine Alignment: This area allows for a more refined alignment. It consists of the following items:

Total points: This box defines the number of random sampled points used to refine the alignment. This number must be a value of at least 3. A good number is around 200 points.

Maximum Iterations: This box defines the number of repetitions the process will make in order to refine the alignment.

Compute: This button begins the refined alignment process. A progress bar on the status bar shows the progress as the process moves through the alignment iterations.

Deviation: This area contains the following items:

Information boxes showing the Average, Maximum, and Standard deviations of the cloud of points in relation to the CAD model.

Histogram: This button takes a random sample of points from the point cloud, projects them onto the CAD, and then shows the deviations for that sample in the the Pointcloud Alignment Histogram dialog box. and then shows the deviations for that sample.

Sample Pointcloud Alignment Histogram dialog box

Matrix: This button displays the Pointcloud Alignment Matrices dialog box. This displays the numerical values of the alignment: the offset and the rotation matrix.

Pointcloud Alignment Matrices dialog box