Getting absolute orientation sensor fusion
Hi, I am using sensor fusion with NDoF setting. I noticed that the absolute orientation quaternions are actually relative orientation. I need the absolute orientation as I need these values to recognise hand gestures. Could you guide me as to how I can calculate the absolute orientation using these values please? Do I just get the initial value when I start recording data and then subtract this value from all the readings? Thanks in advance!
The magnetometer can help give you absolute to an extent. You still need to know something about the starting position of your device. After that, eulers and quaternions are all relative.