PIX4Dmatic generates a quality report that can be used to get an overview of the project and assess its accuracy and quality.
The following is available:
- General report is generated after running the Calibrate or Reoptimize cameras step:
- Click the Report
panel.
- Click the Report
- Detailed quality report (.txt). To export the detailed quality report:
- In the Report panel, Click
- On the Menu bar > File, click Export quality report...
- In the Report panel, Click
IN THIS ARTICLE
Project summary
Project details
Calibration
Tie points
Densification
Digital Surface Model (DSM)
Orthomosaic
The following table describes the content of the quality report:
| Project summary | |
|---|---|
| Version | The version of the software used to process the project. |
| Project name | The name of the project. |
| Date | The date the project was processed. |
| Project details | |
| Average GSD (units) | The average ground sampling distance of the original images. For more information, see Ground sampling distance (GSD). |
| Project coordinate reference system |
The horizontal and vertical coordinate system used for processing. When the vertical coordinate reference system is not specified, the base ellipsoid of the horizontal coordinate is used. |
| Camera name(s) | The name of the camera model(s) used to capture the images. |
| Number of images | The total number of images. |
| Calibration | |
| Image scale | The value of the image scale used for keypoints extraction.
For more information, see Processing options - Image Scale. |
| Maximum extracted key point |
For more information, see Processing options - Keypoints. |
| Reoptimize |
For more information, see Processing options - Reoptimize cameras. |
| Duration | The time needed for processing the Calibrate step.
When Reoptimize cameras option is used, the time corresponds only to the Reoptimize camera pipeline and not to the whole Calibrate step. |
| Completed (%) | The percentage of images that have been calibrated, i.e., the number of images that will be used or have been used for the reconstruction. |
| Calibrated images | The number of calibrated images. |
| Uncalibrated images | The number of uncalibrated images. |
| Camera optimization (%) | The percentage of the difference between initial and optimized focal length of the camera. |
| Median number of matches per camera | The median of keypoints per image. Keypoints are characteristic points or unique combinations of pixels that are detected in an image. |
| Tie points | |
| Number of Tie Points | The total number of Tie Points (GCPs, MTPs, and checkpoints). |
| GCP coordinate reference system | The coordinate system of the ground control points.
When the vertical coordinate reference system is not specified, the base ellipsoid of the horizontal coordinate is used. |
| Mean position error X/Y/Z (unit) | The average error in each direction, i.e., XYZ, of the ground control points. For more information, see How are the GCP Errors defined in the Quality Report?. |
| Sigma position error X/Y/Z (unit) | The standard deviation of the error in each direction, i.e., XYZ, of the ground control points. For more information, see How are the GCP Errors defined in the Quality Report?. |
|
RMS position error X/ Y/Z (unit) |
The root mean square error in each direction, i.e., XYZ, of the ground control points. For more information, see How are the GCP Errors defined in the Quality Report?. |
| Tie Point name | The name of the Tie Point. |
| Type | The type of the Tie Point:
|
| Accuracy X/Y (unit) | The horizontal accuracy of the initial position of the ground control point. |
| Accuracy Z (unit) | The vertical accuracy of the initial position of the ground control point. |
| Position error X (unit) | The difference between the computed and the initial position of the ground control point in the X-axis, i.e., initial position - computed position. |
| Position error Y (unit) | The difference between the computed and the initial position of the ground control point in the Y-axis, i.e., initial position - computed position. |
| Position error Z (unit) | The difference between the computed and the initial position of the ground control point in the Z-axis, i.e., initial position - computed position. |
| Reprojection error min (px) | The minimum reprojection error of the Tie Point on images. |
| Reprojection error max (px) | The maximum reprojection error of the Tie Point on images. |
| Reprojection error mean (px) | The average distance between where the ground control point was marked in an image and the reprojection of the computed position of the ground control point in the same image. |
| Marks | The ratio between the number of marks and the number of valid reprojections. |
| Densification | |
| Density | Defines the density of the point cloud:
For more information, see Processing options - Density. |
| Minimum matches | Minimum Number of Matches (2-6, 3 default) represents the minimum number of valid re-projections of this 3D point to the images.
For more information, see Processing options - Minumum matches. |
| Duration | The time needed for processing the Densify step. |
| Number of points | The total number of points generated in the dense point cloud. |
| Digital Surface Model (DSM) | |
| Resolution | The resolution used to generate the DSM. If the mean GSD computed at the Calibrate step is used, its value is displayed. |
| Surface smoothing | The radius of the median filter used for surface smoothing of the DSM (0 - 5, 2 - default).
For more information, see Processing options - Surface smoothing. |
| Interpolation | The Interpolation parameters affect the completeness of the generated DSM:
For more information, see Processing options - Interpolation . |
| Duration | The time needed for processing the Digital Surface Model (DSM) step. |
| Image resolution (px) | The resolution of the generated DSM. |
| Orthomosaic | |
| Resolution | The resolution used to generate the Orthomosaic. If the mean GSD computed at the Calibrate step is used, its value is displayed. |
| Duration | The time needed for processing the Orthomosaic step. |
| Image resolution (px) | The resolution of the generated Orthomosaic. |
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