Calculate the distance from the camera to a person based on their size in the footage.
Note: Real-world testing shows that facial features can be discerned in a 48 MP Apple ProRAW photo taken with the iPhone 16 Pro Max’s main camera at approximately 20 meters in good lighting conditions, with a practical limit of 26 meters. This corresponds to a face height of ~17 cm occupying ~29–38 pixels, made feasible by ProRAW’s detail retention and post-processing. This estimate is based on the camera’s 6.86 mm focal length, 9.21 mm sensor height, and 6048-pixel vertical resolution.