1

I am trying to find the height of a drone using the camera only. I can calculate the distance of the object top and bottom. Object is a square platform with width=0.2m. I used the equation provided by this article: https://www.pyimagesearch.com/2015/01/19/find-distance-camera-objectmarker-using-python-opencv/

Now, i am writing a program for a small drone, is there a way to calculate the height of it using the distances shown in the image below? The platform is always sitting straight as shown in the image. FOV of the camera = 82.6 degrees

enter image description here

  • 4
    I’m voting to close this question because it is about using a camera as a measuring device rather than to produce an artistic or documentary photograph as the end result. – Michael C Jun 23 at 16:01
  • Perhaps try at math.stackexchange.com? – Kahovius Jun 23 at 17:19
0

Assuming your distances are accurate, you have two right triangles:

  1. Drone, point on ground below drone (H), bottom corner of platform
  2. Drone, point 20cm above ground below drone(H-h), top corner of platform

Using Pythagoras theorem, with D the distance between ground track of drone and platform:

  1. H²+D²=distance2²
  2. (H-h)²+D²=distance1²

You substract both sides: 2*H*h-h²=distance2²-distance1²

I'll let you extract H from that because it is to complicated to write in markdown :)

But I would be surprised if your distance were accurate enough

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.