The 3D Auto Filter option can be used to perform feature extraction based upon proximity using geometry relationships with a nominal feature defined. Selecting this option will bring up the following dialog:
It provides a means to select a list relationships you would like to detect and a list of point clouds to filter from. It then will search through each relationship and all the clouds and populate all of them with the results at one time.
It can be used “Live” as part of the Nominal Geometry Relationship build process. With the dialog open and the Live Auto Detect check boxes checked. Any newly built compare to nominal geometry relationship will be automatically analyzed and features extracted as part of the build process.
Alternatively the same filter controls can be accessed for points well as clouds. See more on points Points Here.
The Nominal Geometry Auto Filter dialog offers the following options:
Relationship and Point Clouds Selection.
Add Relationships. Provides the ability to select a set of predefined Geometry Relationships
Remove Relationships. Allows the user to remove the currently selected relationship from the list to consider.
Add Input Clouds. Provides the ability to select a set of point clouds to use for the filter process.
Remove Input Clouds. Allows the user to remove the currently selected point cloud from the list to consider.
Auto Detect. This check box comes into play when building geometry from CAD using the Live Auto-filter function.
Cloud Thinning Controls
Count Based - Cloud Thinning Options. This selection mode and control provides access to standard cloud thinning controls including Nth point decimation and limit selection.
Spatial Based - Voxel Size. This thinning options provides a more advanced volume processing approach to thinning. The Spatial Filtering size designation defines the size of the volume to be processed to return a single point, and the Minimum points designation provides a means to exclude outliers and ignore volumes without a sufficient point count.
Settings. The settings button provides direct access to a set of generic filter controls that can be used if feature specific settings were not set in advance.
Use Filter Settings. With this option enabled the specific settings for cloud filtering set in each included feature will be used for the filter process.
Auto Filter. The auto Filter button triggers the extraction process.