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（Ⅰ）MarkerlessCalibration

  1. When calibrating with Astra Professional software and loading the calibration file after calibration is completed, please turn off all the input methods downloaded on your computer and use the Microsoft input method that comes with the system.
  2. When entering the model's height, note that the unit in the input box is millimeters. You need to convert the height to millimeters and fill it in. Otherwise, an incorrect height value will affect the human body effect.
  3. The color of clothes will affect the calibration effect to a certain extent. During calibration, the more consistent the colors of the upper and lower body clothes are, the better the calibrated human body effect will be.
  4. During calibration, the model's feet should be naturally spread apart, and try not to bring the two feet too close together.
  5. Since the Astra Professional system relies on the spatial coordinates of the lens for 3D reconstruction, do not move the position and angle of the lens once the calibration is completed, otherwise it will cause reconstruction abnormalities.
  6. Open the Astra Live software, go to Settings, In the Intelligent Settings, turn on the "Markerless" switch;
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  1. Open the reference video view, click View - Reference Video Calibration, and select 6 - point calibration;
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  1. The calibration personnel enter the venue, click the "Start Calibration" button at the bottom of the calibration panel, enter the height of the calibration personnel in the pop-up window (the unit in the height input box is mm), click the Calculate button after entering, and then click the Save button;
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  1. The calibration personnel stand in the APOSE position, click the "Freeze Frame" button, then click the "Add Frame" button. After adding a frame of calibration data, the calibration personnel adjust their positions again and repeat the above operations to add sample frames until the calibration result is obtained. It is recommended that the calibration result be "Good" or above. If the result is "Poor", we suggest you recalibrate. During the calibration process, the current calibration status and the number of added sample frames will be printed on the panel.
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  1. After the calibration is completed, the calibration file for this time will be automatically saved in the current working directory, and the default file name is "video.mcal";
  2. Switch the view to the 3D view, have the model stand within the visible area of the AI camera, and 22 Marker points of the Markerless human body will be displayed on the 3D view. At this point, you can create a Markerless human body and start using the software.
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Precautions for calibration:

  • The calibration personnel should stand in the venue, observe the images of each camera before clicking "Freeze Frame", and ensure that the full body of the model can be captured and displayed in the view of each camera.
  • When adding frames at different positions, do not calibrate near the same position. Instead, change to multiple different positions for calibration.
  • It is recommended to stand and calibrate in front of, behind, to the left and right, and at the side of the camera, so that the software can collect sample frames with sufficiently high precision for calculation, achieving a better calibration effect.