Aha! I wonder if Apple uses this for their “create sticker” feature, where you press a subject on an image and can extract it to a sticker, or copy it to another image.
Definitely not, that works on any image no matter the source. Also depth probably wouldn't help you that much, practically everything would include the floor or table it was sitting on in that case.
That would be a machine-learning only approach, semantic segmentation.
