Automatic registration - PIX4Dsurvey

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Automatic registration

Pix4Dsurvey distant outlier filter icon

Outlier Filter

Pix4Dsurvey terrain filter feature icon

Terrain filter

Pix4Dsurvey grid of points feature icon

Grid of points

Pix4Dsurvey TIN feature icon

TIN

PIX4Dsurvey contour lines icon

Contour lines

PIX4Dsurvey allows for the automatic registration of imported data (point cloud or photogrammetry project in the form of point clouds and calibrated images) to an existing PIX4Dsurvey project. Any data can be taken as a reference. This processing is optional but needs to be performed as the first step before proceeding with other processing (filters, grid of points, ...).

 
Access:
  • Click Process Pix4Dsurvey process icon or,
  • On the Menu bar, click Process > Automatic project alignment.
 
Warning: Automatic registration relies on well-calibrated projects for success. Poorly calibrated projects are not guaranteed to succeed. In general, aerial photogrammetry projects and Lidar/laser scans are well-calibrated, and their registration is mostly successful.

Reference point cloud

Choose a reference point cloud from the drop-down list of available point clouds. The automatic registration will be based on this reference point cloud.

Point cloud to register

Choose a point cloud to register from the drop-down list of available point clouds. The point cloud chosen as a reference will not be available from this list.

 
Information: If a point cloud that comes from a project is selected as point cloud to register, all the point clouds and images from the same project will be affected.
 
Warning: Vectorized data (such as polylines, polygons, volumes, ...) based on the point cloud to register will not be registered. Proceed with the vectorization only after registering all the point clouds that need this process.
 
Important: The reference point cloud and point cloud to register must have common features. All associated point clouds and images will be affected.
 
Tip: PIX4Dcatch projects processed using the PIX4Dcatch template in PIX4Dmatic are more likely to be successfully aligned.
 
Tip: Registering projects in EPSG coordinate systems to point clouds in arbitrary coordinate systems will work better if the X and Y values are closer.
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