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For example, in this tutorial, I have some problems in understanding the cv2.getOptimalNewMatrix. Already read the documentation and made some search, but I still can't understand it. I don't get the meaning of the return of this function:

Returns the new camera matrix based on the free scaling parameter

What does "free scaling parameter" means?

I hope someone can give explanation and maybe some examples on this. Thanks.

For example, in this tutorial, I have some problems in understanding the cv2.getOptimalNewMatrixcv2.getOptimalNewCameraMatrix. Already read the documentation and made some search, but I still can't understand it. I don't get the meaning of the return of this function:

Returns the new camera matrix based on the free scaling parameter

What does "free scaling parameter" means?

I hope someone can give explanation and maybe some examples on this. Thanks.