2. TL Calibration

1.Keep the camera in live view mode, click the "Calibration" button at the top of the software interface to open the calibration panel. After setting the calibration parameters in the panel, select "TL Calibration."

2.In the calibration window, "Rod Length" refers to the distance between the reflective markers at both ends of the T-shaped calibration rod. Simply enter the number labeled on the rod. "Duration" refers to the calibration time, typically set between 60 to 120 seconds. After setting these parameters, click the "Next" button. The person handling the rod should hold the T-shaped calibration rod and swing it repeatedly within the capture area to begin data collection.

3.During the calibration process, a progress bar is displayed and gradually advances as the T-rod is swung. When the progress reaches 50%, the background color of the "T Calibration" section changes from orange-yellow to green. Swing the T-shaped calibration rod to cover as much of the camera’s visible area as possible. In the 2D views of all cameras, no more than three markers of the T-rod should be visible (i.e., the number in the lower-left corner of each 2D view should be less than or equal to 3, and ideally equal to 3 in as many views as possible). During calibration, the 2D interface displays the area covered by the rod sweep, showing the amount of usable data and noise in real time. When the dialog indicates the target frame count has been reached, a sound notification will be triggered, and a "Calculate" button will appear at the bottom of the floating window once the progress bar reaches 100%.

4.Click the "Calculate" button to start the computation process. Once the calculation is complete, the software will provide a preliminary calibration result: Poor, Fair, Good, or Excellent. (Note that this is not the final result. The final calibration result will be updated after the L calibration is completed, taking both TL and L calibrations into account.) The 2D residuals for each camera will be displayed in the camera list.During the calculation process, a progress bar will display the current progress. You can also click the "Abort" button at any time to stop the calculation and return to the pre-calculation state.

5.After completing the T calibration, the cameras and extracted points can already be displayed in the 3D view. However, since origin calibration has not yet been performed, the camera positions are still incorrect and need to be adjusted by specifying the origin. Place the L-shaped calibration rod at the center of the capture area and mask out all noise points to ensure that only the four markers on the L-rod are visible in each camera view. Then switch to the 3D view to confirm that only the four points of the L-rod have been reconstructed. Once confirmed, click the “L Calibration” button.

6.After completing the L calibration, save the calibration file. The system is now ready for normal use.

During T-Calibration, a progress bar is displayed that moves forward gradually with the swing of the T-shaped bar. When the progress bar reaches 50%, the T-Calibration background color changes from orange-yellow to green. Swing the T-shaped bar to cover as many corners visible to the lenses as possible. Each 2D view from all lenses should display a maximum of three markers of the T-shaped bar (meaning all 2D views should have a number in the lower left corner that is less than or equal to 3, aiming to have as many lenses as possible display a number of 3). During calibration, the 2D interface shows the areas covered by the calibration bar, displaying real-time available data and impurities. When the dialog indicates the predefined number of frames, there will be a sound prompt, and when the progress bar reaches 100%, a calculation button will appear below the popup window. Click "Calculate" to initiate the calculation process. After completion, the software provides feedback on the calibration result (rated as Poor, Fair, Good, or Excellent). On the right side of the T-Calibration screen, different icons are displayed based on the calibration results. If the calibration result shows "Poor," it is suggested to redo the calibration; otherwise, the file can be saved and used normally. Click "Save Calibration File," input a file name, and click "Finish."During the T calibration swinging process, you can click the 'Terminate' button at any time to stop the swinging. After stopping, you can click 'T Calibration' again to restart the swinging process. If you are not satisfied with the swinging data after completion, you can click the 'Previous' button to return to the state before the T calibration swinging started and restart the swinging operation.

8.2.5

1. During the calculation process, you can click the 'Terminate' button at any time to stop the calculation. If the calculation result is poor or average, you can click the 'Previous Step' button to return to the page before calculation and recalculate the result. Alternatively, you can click the 'Previous' button twice to return to the state before the T calibration swinging started and redo the swinging.
2. Click on "3D Data View" in the toolbar to display the 3D view (8.2.2). This 3D interface can be rotated, panned, and zoomed in using Ctrl/Shift in conjunction with the left/middle/right mouse buttons. Click the play button at the bottom of the interface to put the camera in Live operation mode. In the 3D view, holding down the left mouse button and dragging allows for free rotation of the 3D view. Clicking the right mouse button brings up the function menu. Use of key combinations: Hold down Shift + left mouse button in a non-frozen frame state to select a named point. Hold down the middle mouse button to drag the view, and scroll the middle mouse button to zoom in or out. Ctrl + left mouse button can rotate the view in a fixed direction. The space bar restores the original 3D perspective with one click.

8.2.6

warning

Note: If using the Orbit， you can perform Origin Point Calibration to quickly operate the system.