Calibration

Go to Menu > Layout > Calibrate to see all necessary calibration tools.

Calibration Layout

Preparation

Check in the Devices pane that all cameras are set to Enabled and LED are On.

Switch cameras to video mode by selecting all cameras in the Device pane and then pressing the crosshair symbol to identify reflections in an area.

Devices Pane in Object Mode Video Mode of a Camera

Make sure no reflective objects are visible to the system. Remove all all reflective objects from the space or cover them. Many shoes have actually reflective surfaces, so make sure to either tape them or take them off for the following processes.

Reflections can be seen in the Camera Preview pane, which can be zoomed with the mouse wheel. Some small reflections on the floor can not be avoided and should not influence the tracking.

Switch back cameras to object mode by selecting all cameras in the Device pane and pressing the grayscale symbol to continue calibration.

Devices Pane in Video Mode Object Mode of a Camera

Ideally, the space should look like this (minor reflections):

Object Mode reduced reflections

Camera Settings

Place a marker inside the tracking space as a reference. Select all cameras in the Devices Pane and adjust camera the following camera settings only if reference marker just placed is not clearly visible and/or there are a lot of false marker detections caused by reflections.

Gain

Set Gain to the highest valueif you use the whole motion capture space.

Recommended Gain Value: 8: High (Long Range)

Exposure

Longer (high) exposure values makes small markers more visible, but high values can introduce false markers. It is best to minimize the exposure setting as much as the markers are clearly visible in the captured images and that there are as less false markes as possible. Set the exposure to the lowest possible value that the marker is still visible and false markers are reduced to a minimum.

Recommended Exposure Value: 100

Threshold

Keep the threshold as high as possible to remove false reflection but keeping markers still visible.

Recommended Threshold Value: 220

check the Tracking Parameters

Tested settings are:

Camera Frame Rate: 100 Hz

Exposure: 120

Threshold: 210

Gain: 8: High (Long Range)

adjust this values until the reflections from the floor are acceptable.

LED

Set LED

Exposure

Longer (high) exposure values makes small markers more visible, but high values can introduce false markers. It is best to minimize the exposure setting as much as the markers are clearly visible in the captured images and that there are as less false markes as possible.

Threshold

Keep the threshold as high as possible to remove false reflection but keeping markers still visible.

Calibration with Passive Wand

Once all the reflections are removed, clear the previously set masks by pressing Clear Mask in the Calibration pane:

Calibration with Active Wand

then set the masks again (press “Mask visible”). it is important that nobody is inside the space at this moment.

once the masks are set, the space is ready for wanding. make sure you are using the correct wand (500mm)

keep on wanding until each camera has at least 1500 Samples:

press calcualate:

once the result looks like this:

confirm to apply:

and as the last step set the ground plane. The ground plane L has a defect waterbalance, so please do not adjust the leveling screws, it should be ok the way it is now.

Vertical Offset is the distance from the ground to the center of the reflectors.

the ground plane Z-Axis should point towards the computers. there are three markers on the trackingspace that indicate the position. If you plan to use the tracking system with projections, take special care to position the groundplane as precise as possible over the markers.

save the callibration file inside your session folder.