FAQs | NOKOV

Calibration failed multiple times?

First, confirm whether the configuration file has been loaded, and then verify if the T-bar length setting for calibration is correct. If these two steps have been correctly completed, further confirm whether any noise points in the scene have been removed during calibration.

How to create a coordinate system?

The coordinate system is created during calibration, and the geodetic coordinate system cannot be arbitrarily changed later.

After calibration, why do many noise points appear in the field?

One possibility is that noise was not completely removed during the T-bar calibration, and calibration passed just at the critical condition. Noise points appeared during the calibration process, and it is natural for noise points to appear during subsequent data collection. Another situation is the presence of reflective phenomena from equipment in the field. The equipment might have been removed from the field during calibration and brought back afterward, causing reflections.

Why is the ground in the software oriented vertically?

Because the previous settings file was set with the Z-axis or Y-axis pointing upwards, changing the position of the coordinate axis now will alter the geodetic coordinate system. You only need to recalibrate.

During calibration, why does one camera's 2D view have little or no gray coverage, preventing calibration?

Check the numbers in parentheses at the bottom left corner of the 2D view to see if there are any noise points other than the T-bar in the camera's field of view. If there are, they need to be removed or masked in the software.

Why are the window and button layouts abnormal in the software, with incomplete text display?

This is related to the Windows operating system's scaling settings. There are two solutions: 1. Right-click on the Windows desktop — Display Settings — Scaling, set to 100%. 2. Right-click on the XINGYING software icon — Properties — Compatibility — Change high DPI settings — Check "Override high DPI scaling behavior" and set the scaling performed by "System."

Calibration failed with the message "Wand calibration failed, please recalibrate"?

After confirming that the camera position, angle, aperture, and focus have been adjusted, the following causes need to be investigated: 1. The physical size of the L-shaped calibration frame matches the settings in the software. According to the software settings menu — Calibration — Calibration Frame — Calibration Rod Type, select the corresponding calibration rod type based on the distance between Marker1-Marker3 on the physical L-shaped calibration frame. 2. Check if there are any extraneous noise points in the 2D view, especially checking if there are any reflections on the person swinging the T-bar calibration rod to avoid noise points other than the T-bar during the swinging process.

Error message "Failed to connect camera" when connecting the camera?

You can gradually analyze the following situations: 1. Hardware analysis: Check whether the switch is powered properly and whether the network cables at both ends of the computer and switch are loose; 2. Software analysis: Check whether the network card IP connected to the switch is 10.1.1.198, and whether the firewall and antivirus software are disabled.

After connecting the cameras, what to do if the number of cameras detected does not match the actual number used?

After connecting the cameras, in the 2D view, select "Settings" - "2D View" - "Display IP" to show the 2D view of all cameras and check the continuity of IP addresses to see which camera is not connected; or visually inspect if the camera's digital display is off, which may indicate a loose network cable or POE. Reconnect the network cable and POE splitter.

Is there a more convenient way to mask noise points in the field instead of masking them one by one?

You can remove the markers and calibration tools from the field and use the "Calibration" window's "Start Occlusion" function to automatically occlude any noise points present in the current field with one click. After completion, manually check each camera to ensure complete occlusion.

During calibration, what to do if one camera's 2D view has little or no gray coverage, preventing calibration?

Check the number in brackets at the bottom left corner of the 2D view to determine if there are any noise points in the camera's field of view other than the T-bar. If there are, they need to be removed or occluded in the software.

When viewing the camera grayscale image, why do some cameras show horizontal or vertical lines, obscuring the image?

Check whether the camera network cables are securely connected, restart the switch, or change the switch's network cable interface.

When viewing the camera grayscale image, why is the image still not bright enough even with the aperture set to maximum?

Calibration is not affected as long as you can see bright reflective markers in the camera's 2D view.

Calibration results are often not satisfactory, frequently showing as Normal or Poor?

1. Increase the swing time, and ensure the swing motion is not too fast, so that the gray area in the camera view is as deep as possible, thereby increasing the effective data volume. 2. Contact sales or engineers in the group to confirm whether the software or camera firmware is the latest version.

In the 3D view, why do white marker points appear fragmented?

The camera in the system may have been touched/moved in position or angle, or the system has not been calibrated for a long time; recalibration will suffice.

In the 3D view, why is there incorrect recognition of marker points in the rigid body, or incorrect recognition of the rigid body's axis?

This is mostly due to a high degree of symmetry in the arrangement of multiple markers on the object being measured. It is recommended to arrange them in an irregular, asymmetrical structure. You can refer to the video at https://www.bilibili.com/video/BV1Rr4y1c7Yp.

During L-shaped calibration, what to do if some cameras in the software's 2D view show a red square in the top right corner instead of all turning green when clicking next?

Some cameras have not turned white because they have not completely recognized the four points of the L-shaped calibration. You can proceed with T-shaped calibration, and subsequent calculations will be performed using the calibration data.

When collecting data in the 3D view, rigid bodies and points can be seen, but the screen remains static when objects move. What is the reason?

Check whether the "Unfreeze" button has not been clicked.

How to display the trajectory information of markers?

Supports displaying the trajectory information of markers in post-processing mode. Right-click with the mouse, check "Trajectory" in the 3D view display settings, and then select the marker point for which you need trajectory information to display it.

Does the created rigid body support axial modification?

In post-processing mode, load motion capture data and manually create a markerset to adjust the position and angle of the rigid body. Rigid bodies created with one click cannot be modified in real-time; modifications can be made in post-processing using collected data. In post-processing, select the rigid body and modify its axis in the "Bone Axis" field on the right-side properties panel.

What to do if there is an error message about marker points when establishing a human skeleton?

Check if the number of markers is 53 points. If fewer than 53, verify if any markers are missing or obstructed. If more than 53, check for extra markers or noise points in the environment.

Why can't the human skeleton template be recognized after a period of time, even though it was initially set up correctly?

Verify if the number and position of human markers have changed. Click "Reset Recognition."