How it works
An Optical Flow Sensor (OFS) takes multiple scans of the ground, and then compares pixels or features to determine relative motion! Because on optical flow sensor needs to scan the ground for features, there’s a minimum and maximum height that it can be used at! The height depends on the sensor itself, but the range is usually between 0.08-30m!
What do we use it for?
Optical flow sensor on drones allow centimeter level precision when hovering in place, since the system is capable of determining very small movement vectors. This allows the drone to hover in place, or track the ground in a very straight line in autonomous or guided flight modes.