Findout the direction of fan rotation

I’m new to OpenMV. I would like to know whether I can somehow measure the directiion of an object rotating fast eg- a computer fan. Will any of the optical Flow algorithms work ?
Thank you
Bitto Joseph

Depends on if the camera can actually see the blades spinning. The optical flow method using patches could see this however. But, the camera has to be fast enough to get a non-blurry shot of the blades. If you want get that then yes. I don’t know if this is possible.