# Getting the essential from the fundamental matrix

Is it possible to get E from F? I suppose that can't work, because then I could calculate the the extrinsic (and maybe also intrinsic?) parameters of the cameras without a calibration object of known size etc. like so:

1. Pick (8) corresponding points in images i1 and i2
2. Calculate F with the eight-point-algorithm
3. Calculate E from F
4. Determine relative position and orientation of cameras from E (and maybe it is also possible to get the intrinsic parameters, K?)