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2. Basic Calibration

  1. Keep the camera in Live playback mode, click the "Calibration" button in the toolbar above the software to open the calibration panel, and select "Initial Calibration" in the calibration window. Click on the gear button on the right to open the calibration settings, select the calibration axis (Z/Y) in the "Frame, " select the L calibration rod you are using (L-600/L-450/L-240) in the "L-Type, " and "Manual" for the custom L-shaped rod type.
  2. Next, perform L calibration by placing the L-shaped rod, selected in step 1, in the center of the field. Confirm the coordinate orientation: when the Z-axis is upward, the long side of the L-rod points in the positive X-axis direction, and the short side points in the positive Y-axis direction. When the Y-axis is upward, the long side points in the positive Z-axis direction, and the short side points in the positive X-axis direction. Before performing L calibration, ensure that the number in the bottom left parentheses of all 2D views is stable at 4. Click "L Calibration" at the bottom of the panel. If L calibration is successful, the window will become a T calibration window, and the "Next" button will be clickable. If L calibration fails, a prompt "L Calibration Field" will appear, and the "Next" button will be gray and non-clickable, possibly due to the presence of extraneous points in the calibration site. Repeat the impurity removal operation until L calibration is successful.
  • All Passed: All lenses pass calibration, and the calibration result graph displays in green.
  • The calibration result graph displays in yellow.
  • L Calibration Failure: The calibration result graph displays in red.
  • T calibration can only proceed when all lenses pass or partially pass the L calibration; otherwise, continue L calibration until successful.

T-Calibration Swing

  1. Swing the club at a slower speed to ensure a distinct up-and-down motion, with each swing taking at least 6 seconds to complete.
  2. Start by slowly moving around a 3x3 range for two rounds with the golf swing, then narrow the range and move around a 2x2 and 1x1 area slowly. Finally, focus on intensifying the golf swing for the central area.
  3. Calibration time is recommended to be at least 100 seconds.
  4. During the T-Calibration swing process, you can click the "Abort" button at any time to stop the swinging process. After stopping, you can click "T-Calibration" again to start the swing process. Once the swing is completed, if you are not satisfied with the swing data, you can click the "Previous Step" button to return to before the start of the T-Calibration swing action and begin the swinging operation again.
  5. During T-Calibration, a progress bar is displayed, moving forward gradually with the swing time. When the progress bar reaches 50%, the T-Calibration background color changes from orange-yellow to green. Swing the T-shaped bar, covering as many corners visible to the lenses as possible. Each lens's 2D view should show a maximum of three markers of the T-shaped bar (meaning all lenses' 2D views should have a number in the lower left corner that is less than or equal to 3; aim to have as many lenses as possible display a number equal to 3). During calibration, the 2D interface displays the areas covered by the calibration bar, showing real-time available data and impurities. When the dialog shows the designated frame count, i.e., when the progress bar reaches 100%, a calculation button appears below the popup. Clicking "Calculate" triggers the software to enter the calculation process. After completion, the software will provide feedback on the calibration result (rated as Poor, Fair, Good, or Excellent).

Calibration Results

  1. Set the computation level to 40 during calibration.
  2. Ensure that during calibration calculation, the 2D residual is under 1, the 3D residual is under 3, and the deviation is under 2.0 to avoid affecting the human body capture effect.