The plain SPAAM algorithm just uses Direct Linear Transform (DLT) to approximate the extrinsic (pose) and intrinsic orientation of the virtual camera (eye-display combination). DLT assumes a pinhole camera model. Hence, it does not consider radial distortion.

SPAAM is simply put just a procedure to collect your 3D-2D point correspondences. Hence, you could also use other models (considering distortion parameters) and estimation methods.

Best,

Jens

Thanks, Jens. Excellent, that's what I assumed, but was uncertain.