I&#x27;m not sure on the implementation details of this particular method, and not really qualified to score anyone&#x27;s understanding of anything in this field :-) but the shape of what you say is correct - you&#x27;re modelling the physics of what happens in a lens system X (X can be a range of systems of course, not necessarily one particular system, but you get the idea), and in an alternate system Y (in this case Y is no lens, but a coded aperture used to add extra contextual information to the captured light) so you can use software to do a virtualised mapping of what your light captured from the scene via system Y would have looked like if had instead passed through system X - in other words, estimating virtually what a photo of the scene would have looked like if you&#x27;d used a lens, even though you&#x27;ve actually got no lens. Very clever application indeed!