DNG Camera Calibration

1

Hello,

I’m trying to build a calibration profile for some RAW DNG files.

I have opencv calibration parameters in the form [k1 k2 p1 p2 k3], for example:
1.85007269038328814e-01 -6.27484109489924613e-01 5.93816334068702329e-04 -1.14584511526930706e-03 6.41327082336750953e-01

but seems that are not compatible with the WarpRectilinear function defined in the DNG specs 1.7 defined in this way (pag. 104)

Screenshot 2023-10-21 015040
Screenshot 2023-10-21 015040753×905 80.8 KB

The result is kind of very strong, do you know if I need to scale any parameter?

Thank you

3

I found out that the DNG Frame Warp is the brown conrady (un)distortion model with a parameter fixed to 1.0 and a tangential parameters switched (p1=t1,p2=t0)