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I am working on a small project wherein I am estimating the distance to an object of a known size, both physical and pixel dimensions.

So far I have used a triangle similarity approach and I have measured the distance down to a few millimeters in deviation from the actual distance. With that approach, I calculated a focal length of my camera using the specific pixel height of the object at a known distance. However, that was before I tilted the camera.

What approach can I take now that the camera is tilted?

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  • $\begingroup$ Do you know the angle of the object relative to the camera’s line of sight? $\endgroup$ – amd Dec 12 '17 at 19:13
  • $\begingroup$ Yes that angle is known. $\endgroup$ – user1245704 Dec 12 '17 at 20:04

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