About examples“Create 360° Bird's-Eye-View Image Around a Vehicle”

Hello, officials and community partners.：

I want to ask a question about the example of "Create 360 ° Bird's Eye-View Image Around a Vehicle". The address is：https://ww2.mathworks.cn/help/driving/ug/create-360-birds-eye-view-image.html

I hope you can get help or relevant information. I want to convert the 8 cameras in the example into 4 fisheye cameras. Where should I modify them? What should I do to calibrate these four fish-eye cameras?

There is also a focus on image stitching and distortion correction. How to modify it? What is the impact on code generation? Hope to get help, thank you!