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How to predict the shape of the circle from any point of view?

  1. Apr 24, 2012 #1
    As we know a circle view at an angle appears as an ellipse,
    as you see in the picture, the center of the camera aim to the center of the circle ,
    the angle between the circle axis and the camera is ө,
    the azimuth between mojor axis(a) and the camera is ∞,
    the rotation of the camera is €,

    1. How to predict an orientation of major and minor axis and the ratio of its axes(b/a)?? ,if we only know these ө,∞,€ angle, regardless of size of ellipses.

    2. Is there any theory to apply this example?


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    Last edited: Apr 24, 2012
  2. jcsd
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