RectificationΒΆ
The model of a rectified camera is described with just one value, which is the focal length.
The rc_cube reports a focal length factor via its various interfaces. It
relates to the image width for supporting different image resolutions. The
focal length 
in pixels can be easily obtained by multiplying the
focal length factor by the image width in pixels.
Note
If a blaze camera is used instead of a stereo camera, only
one camera image is provided. However, the image is rectified,
i.e. lens distortion is removed and the principal point is in the
image center.