1. A system for computing one or more calibration parameters of a camera, comprising: a processor configured to: display a first object including first parallel features; shift the first object in a direction transverse to said first parallel features; display a second object after displaying the first object, the second object including second parallel features, such that said first and second features, if they were overlapped, define fiducial points where they would intersect; shift the second object in a direction transverse to said second parallel features; receive one or more first camera images from a first camera viewing the first object and the second object; locate a first set of projections of the first parallel features first object fiducial points and the second parallel features in each of the one or more first camera images; compute a set of 3D positions in a common frame of reference of the first and second features based at least in part on the first set of projections; receive one or more second camera images from a second camera viewing the first object and the second object; locate a second set of projections in each of the one or more second camera images; and compute one or more calibration parameters of the second camera using at least in part the second set of projections and the set of 3D positions of the fiducials in the common reference frame; and a memory coupled to the processor and configured to provide the processor with instructions.