This article is a quick start guide on how to use PIX4Dmatic for the first time. In particular, this page will show how to get from an image dataset captured by a drone or PIX4Dcatch RTK to the creation of accurate 2D and 3D maps and models.
IN THIS ARTICLE
Setting up a project Log in
Create new project
Import Tie points
Coordinate Reference System
Image Coordinate Reference system
GCPs Coordinate Reference System
Project coordinate system
Calibration
Dense point cloud
Planes
Mesh
DSM
Orthomosaic
Setting up a project
The first step in PIX4Dmatic is setting up the project, defining the required parameters, and adding the necessary data before moving on to processing.
Log in
Create new project
For more information: Create a project - PIX4Dmatic
Import Tie points (GCPs and CPs)
Adding and marking Tie points (Ground control points (GCPs) and Checkpoints (CPs)) in a project is optional but it's a method to maintain and verify the absolute accuracy of a project.
For more information on Tie points: Tie points - PIX4Dmatic
For more information on how to mark Tie points: Mark Tie points - PIX4Dmatic
Coordinate Reference System
After importing the images and the Tie points, the Coordinate Reference System (CRS) must be set. PIX4Dmatic allows setting the CRS of the Images, the GCPs, and the Project.
Image coordinate reference system
GCPs coordinate reference system
Project coordinate reference system
The project Coordinate Reference System is derived from the GCPs coordinate system. No GCPs are required to change the coordinate system in a PIX4Dmatic project.
Processing options
After setting up the project, the next step is processing it. From Calibrating the images to generating a Digital Surface Model (DSM) or an Orthomosaic, PIX4Dmatic has plenty of different options in each of the processing steps to choose from, depending on the project's needs. PIX4Dmatic comes with three different preset processing templates:
Processing templates in PIX4Dmatic.
For Custom: By changing any of the processing options at any step during processing, PIX4Dmatic will automatically change the processing template to Custom.
Calibration
PIX4Dmatic Calibration step in PIX4Dmatic.
Calibration is the first step in processing a dataset and lays the foundation for the following steps. Default settings are provided and are generally the best place to start.
For more information: Calibration - PIX4Dmatic
For PIX4Dcatch projects: How to process PIX4Dcatch datasets - PIX4Dmatic
Dense point cloud
Dense point cloud in PIX4Dmatic.
A dense point cloud is a series of dots spread across a volume of 3D space that represents the area of interest. The Dense point cloud step is a 3D representation of reality and it's the basis of the other 2D and 3D representations of reality that can be produced in PIX4Dmatic.
For more information: Dense point cloud - PIX4Dmatic
Planes
Planes in PIX4Dmatic.
The Planes feature has been designed to improve mesh generation for man-made environments, including interior and urban scenes where planar surfaces are common. When added to a project, the surface of the mesh will be constrained to the associated Plane.
For more information: Planes - PIX4Dmatic
Mesh
Mesh in PIX4Dmatic.
The Mesh step is generated directly from the dense point cloud and is not necessary for every project. It is not required to generate a mesh to be able to generate the Digital Surface Model and the Orthomosaic.
For more information: Mesh - PIX4Dmatic
DSM
DSM in PIX4Dmatic.
A Digital Surface Model (DSM) is a 2D representation of the elevation of everything in the area of
interest, both natural and artificial. The DSM step is required to generate the orthomosaic, so any
changes to the processing settings of the DSM will also impact the orthomosaic. The DSM step defines the Resolution, enables the Surface smoothing, and enables Interpolation for the Digital Surface Model (DSM) creation.
For more information: DSM - PIX4Dmatic
Orthomosaic
Orthomosaic in PIX4Dmatic.
An Orthomosaic is a highly detailed and realistic 2D representation of reality generated by combining individual images. The Orthomosaic step is generated directly from the Digital Surface Model (DSM), so any errors or gaps in the DSM will also be present in the orthomosaic.
For more information: Orthomosaic - PIX4Dmatic
Outputs
Export window in PIX4Dmatic.
Once processing is complete, the Exports window in PIX4Dmatic provides the selection of the following outputs:
- Quality Report
- Dense point cloud
- Point cloud from mesh
- Mesh
- Digital Surface Model (DSM)
- Orthomosaic
Locate the export folder
To access the outputs, click on File and then Open project folder. The exported outputs are in the Exports folder.
For more information: Outputs - PIX4Dmatic
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