Metric Camera Workbench

Steps to use:

1. Take 10-20 photos of a checkerboard pattern in as many orientations as possible in the most ideal lighting possible.
2. Ensure the checkerboard dimensions and w x h are set correctly (w x h is one less than the number of squares).
3. Press start calibration. If successful, it will give a summary of calibration results and accuracy.
4. You can save and load calibration later instead of doing calibration every time a measurement is needed to be done.
5. There is a drop-down chooser at the top sidebar for choosing measurement mode.
6. The mode "Measurement" is a manual mode with autodetection of the checkerboard pattern.
7. The measurement mode needs reference points that lie in a plane and can only measure in the same plane.
8. The mode "Metric QR" is a fully automated 3D reconstruction based on QR code.
9. Metric QR can be generated given the width, unit, pointer length, etc.
10. Pointer length is the distance from the top left point of the QR to a point diagonal even further left and top. It is intended to be the exact point touching the ground if the QR code is installed on a post.
11. The loaded image will be detected automatically for the QR Code with the correct format and used to reconstruct its position.