METHOD FOR CALIBRATING AN ALTITUDE SENSING STEREO VISION DEVICE OF A UAV

The present invention relates to a method for calibrating an altitude sensing stereo vision device () of an unmanned aerial vehicle (), wherein the method includes: arranging the unmanned aerial vehicle to take off from ground (G) and ascend; deriving at least one first altitude value (-) from the stereo vision device and obtaining at least one corresponding second altitude value (-) from another device () of the unmanned aerial vehicle during the ascent () of the unmanned aerial vehicle; recording the derived at least one first altitude value and the obtained at least one corresponding second altitude value as calibration data; deriving an additional first altitude value from the stereo vision device while the unmanned aerial vehicle flies a route; and adjusting the derived additional first altitude value based on the recorded calibration data.