I have a course problem that asks to calculate the focal length of a camera with the following specifications:
- Field of view along the horizontal axis (X): 60 deg.
- Field of view along the vertical axis (Y): 45 deg.
- Image plane size: (640) pixels along X-axis and (480) pixels along Y-axis.
and it requires to compute the focal length (in pixels) along X-axis and Y-axis, and I don't know how to start.