MATLAB: True angle of view of a calibrated camera

Question

Is there anyway to determine or approximate the true angle of view of a calibrated camera using the matlab camera calibration app?

Answer 1

In case the app uses some kind of pin-hole camera model the relation between radial distance from the image centre (assuming that's where the optical axis is projected) is:

(u^2+v^2)^(1/2) = f*tan(theta)

Here the focal length f is expressed in pixel. From there you get the edge-to-edge or diagonal field-of-view whichever you want.

HTH