Automatic registration - PIX4Dsurvey

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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 AutomaticRegistrationSmall.png Register in the Content panel on the left of the PIX4Dsurvey window.
 
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 project

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

Project to register

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

 
Information: If a point cloud that comes from a project is selected as project 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 project and project 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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