On 02/08/2017 at 01:16, xxxxxxxx wrote:
I am developing a camera-tracking solution for stills in Rhino3D/Grasshopper, which optimizes camera position,rotation,focal lenght and optical distortion through minimizing the deviation of Points in a picture and their projected 3D-counterparts.
So far, it works really well, even with rather imprecise point positioning, but i was wondering wich mathematical model C4D uses to calculate optical distortion, which can be set with two values in the physical camera object.
Now i am using the Brown-Conrady model respectively the definition used in Zhang (https://en.wikipedia.org/wiki/Distortion_(optics)), but as there are different models to describe optical distortion, I would like to know the model C4D uses.
Then i could optimize the solution to fit best with the values i can tweak in C4D.