Quality report - Pix4Dmatic

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:
    • On the right bar, click Report Pix4Dmatic_report_panel.png
      Pix4Dmatic_quality_report.jpg
  • Detailed quality report (.txt). To export the detailed quality report:
    • In the Report panel, Click exportButton.png
    • On the Menu bar > File, click Export quality report...

The following table describes the content of the quality report:

Project summary
Version The version of the software used to process the project.
Project 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 system The projected coordinate system used for processing. 
Camera Model Name(s) The name of the camera model(s) used to capture the images.
Number of images The total number of images.
Processing settings
Image scale The value of the image scale used for keypoints extraction.
  • 1: Original image size.
  • 1/2: Half image size.
  • 1/4: Quarter image size.
  • 1/8: Eighth image size.

For more information, see Processing options - Image Scale.

Maximum extracted key point
  • AutomaticKeypoints parameter set to Auto.
  • Value: The value of Keypoints > Custom parameter set for processing.

For more information, see Processing options - Keypoints.

Reoptimize
  • True - Reoptimize cameras option was enabled.
  • False - Reoptimize cameras option was disabled.

For more information, see Processing options - Reoptimize cameras.

Initial quality check
Completeness (%) 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.
Calibration time 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.

Ground Control Points 
Number of GCPs The total number of ground control points.
GCP coordinate system The coordinate system of the ground control points.
Units The unit of measurement of the coordinate system of the ground control points.
 
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?.
 
GCP name The name of the ground control point.
Accuracy XY [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.
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.
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.
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.
Mean projection error [pixel] 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.
Number of valid reprojections The number of images, on which the ground control point is marked, that are taken into account for the reconstruction.
Number of image marks The number of images on which the ground control point or check point is marked.

 

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