First, connect the camera and place the software in playback mode. Switch to 2D view, confirm that the L-shaped
calibration rod is in the center of the field, and block or remove other reflective markers within the field.
Click the "Show all cameras" button above the 2D view to observe all shots simultaneously, or double-click each shot
in the 2D view to observe only the specified shots. The number in parentheses at the bottom left corner of each
camera represents the number of reflective marker points that the camera can detect, ensuring that only the four
reflective marker points on the L-shaped pole are visible in the 2D view of each camera.
Verify the presence of clutter in each camera's view by subtracting the number in parentheses from the actual number
of reflective marker points in the scene (4 points on the L-shaped calibration pole) to obtain the number of clutter
points.
Remove extraneous points from the site, which often occur due to:
Bright sunlight;
Reflective surfaces on metal tables, chairs, shelves, and flooring
Reflective stickers/logos, jewelry on clothing, shoes, and hats
Stray reflective markers scattered in the captured scene.
Common methods for removing clutter:
Close the curtains to block out sunlight
Remove reflective objects from the scene
Adjust the camera's aperture
Adjust the device's threshold parameters in the software's 2D view (usually between 200 and 600)
Adjust the camera's brightness in the software's 2D view
Use software for mask processing.
The maximum and minimum values can be set in the "Minimum Point Diameter/Maximum Point Diameter" section below the
device panel to filter the diameter range of the "marker" in the 2D view.
Mask Processing
Manual Mode: Double-click the cameras to be processed in the 2D view to zoom in on a single screen. Press and hold
the mouse wheel in the 2D view to drag and drop, frame the area with impurities, and the impurities will be
removed. You can repeatedly select boxes until all the miscellaneous points in the view are removed.
Automatic Mode: Click the automatic masking button in the toolbar above the 2D view, and all 2D points in the view
will be masked. Click "Clear Mask" to delete all masks. Using "Clear Mask" in a single view will only clear the
mask in the current view (as shown in the figure). When selecting an automatic mask, it is necessary to clear
useful and real reflective markers within the venue.
To delete a specific area in the mask box caused by incorrect operation, click the left mouse button to select the
area, and then click the right mouse button.
After the above operations are completed, the calibration personnel should hold the T-shaped calibration rod and
swing it in the field. Another person can observe whether there is a number greater than 3 in the bracket at the
bottom left corner of the 2D view. If so, it indicates that there are impurities in the camera's field of view. Steps
5 and 7 can be repeated for processing until the cameras reach the optimal calibration state.