Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Inverse Projection Problem

  1. Apr 28, 2008 #1
    Image a kite (1 m wide, 3 m high, both crossing at a third of the height).
    Also imagine a digital camera (800x600 pixel with a horizontal field of view of 45°).

    After launching the kite a photo is taken with the camera.

    How can I easily calculate the exact position *and* rotation of the kite in a vectorspace defined by the camera at the moment the picture was taken?
    I tried with trigonometry but failed. I assume there is an easier way with matrices but i don't know how. I appreciate any help.

  2. jcsd
  3. Apr 28, 2008 #2


    User Avatar
    Science Advisor

    ??Given what information?
  4. Apr 28, 2008 #3
    there are four corners of the kite with precise pixel values in the picture.

    and of course, the dimensions of the kite and the specifications of the camera is known.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook