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see corresponding video (earlier version but similar)
Posted on Dec 5 2013
Updated March 25 2016
Blade 3.1 / 3.3.1 Calibrating CamerasConnect the cameras
At the top left side - make sure you click Connect - you will see the cameras respond by lighting up bright red leds, with a blue and a green light. The blue light indicates that cameras are connected. Once we finish the wand wave the green lights will stop blinking and be on solid.
The gearbox icon above the plug icon will turn red when connected.
Calibrate the cameras
There are 4 steps we will follow to calibrate the cameras. Note that if your overall error is > .4, you should try another calibration. Anything under .3 is excellent.
Note about mouse controls: When moving in the Vicon Blade window, RMB forward and backward is an in and out motion with the mouse. Hold both right and left mouse keys down to move around.
|Click the Camera Layout
button (under Studio Activities) to reconfigure
Make sure the menu below Connect is set to CIRCLE FIT (this will only be set to CIRCLE FIT for calibration and RECONSTRUCT or SOLVE for capture).
The process of calibrating the cameras involves the following:
In rare cases you may find the need to adjust the camera settings individually, however since our equipment is monitored closely there is no need - the steps are described in Advanced Camera Adjustments and are included for completeness.
Why calibrate the cameras each capture day?
Running the calibration ensures that Blade software knows the precise location of the cameras to construct 3D points in space from the 3D camera data. This calibration will ensure a clean capture. You may save settings for another session, however keep in mind that changes from movement of any kind (trains, people walking on the floor above, etc.) can affect the cameras. It is good practice to calibrate each capture session.
The goal is to build your cameras data up as evenly and quickly as possible.
What is a good wand wave?
Walk around the perimeter of the capture volume waving the wand up and down and in circular motions. The cameras should reach a value of > 3000 to 5000 in the status report window. The green lights on the cameras will light solid green to indicate sufficient data (as well as the font color of the number in the lower right window). The values of projError are low - this is good. Expect an error with the new wand below .2.
Where way should the wand be placed to set the origin?
Place the wand with the handle pointed to the back of the room. This will define the orientation of the space. Be sure Combined Wand (last entry in the selection menu on the Start Wand Wave options). It should be placed in the center of the volume, parallel to the front of the volume and set level so the bubbles are level. After Set Origin the ring of cameras should be parallel to the floor.
Now the cameras are calibrated, it's time to capture a Range Of Motion (ROM) for your actor.