Regarding the rotation angle to find f

[srp-31]

Hello

I hit across your code while looking for a Euler angle based perspective transform. Really nice work. I just had one clarification- According to the tutorial you are referring(https://stackoverflow.com/questions/17087446/how-to-calculate-perspective-transform-for-opencv-from-rotation-angles), shouldn’t you be using the rotation about x axis to find the focal length?