[Python] Calculate the distance between the camera and the detected objects? - YOLOv8

I trained a YOLOv8 small model using my custom dataset, and it successfully detects people, vehicles, and various other objects. To enhance its functionality for downstream processing, I need to calculate the distance to these detected objects.

I have the camera's focal length (in mm) and would like the distance to the object (in feet or meters).

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