FBrownConradyUDDistortionParameters

Brown-Conrady U-D lens distortion parameters (polynomial division model), using a polynomial division model: (1 + K1*r^2 + K2*r^4 + K3*r^6) / (1 + K4*r^2 + K5*r^4 + K6*r^6) where the output of that equation represents the distorted image coordinates.