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2020-09-05 11:27:03 -0500 received badge  Popular Question (source)
2013-04-26 10:16:49 -0500 commented answer Get top-down view

Hello Rogeeeer, first link, as you wrote, doesn't help to anything, because methods doesn't accept angle of camera. Unfortunately i am not able to solve it neither with the second hint. Believe me pls, I have read about it a lot.

2013-04-26 04:31:48 -0500 asked a question Get top-down view

Hi guys, I need your help with next task:

  1. how to get top-down view from camera view.
  2. measuring real world distances in the picture (just on surface).

What i know or have:

  1. camera field of view (vertical, horizontal)
  2. camera picture resolution (vertical, horizontal)
  3. angle of camera view
  4. height of camera
  5. picture with compensated lens distortion.

I know, everything is about using next methods: warpPerspective(), getPerpectiveTransform, or similarly with affine transform.

But I really don't know how to correctly use it.

Thanks in advance David.