What is fx, fy, cx, cy of IMX219 160FOV CSI Camera?

I am two CSI IMX219 160FOV cameras. I want to know that what is fx, fy, cx, cy of this camera?
fx - x-axis focal length of camera in pixels
fy - y a-axis focal length of camera in pixels
cx - x-axis optical center of camera in pixels
cy - y-axis optical center of camera in pixels

What is formula you are using to calculate it ?
How do I can calculate it?
Please do tell me the exact values.

please do answer me as soon as possible, I will be very thankful to you.

Suppose consult with the module vendor would get much detail information.

You may check this. It was for opencv3, but you would get most of it.
Once you have the correction matrix, you may try this for GPU remapping.