Exceleent library. But how does this differ from PoseNet and other libraries that pinpoint eyes, feet and other key points? I guess what I am really missing is

Exceleent library. But how does this differ from PoseNet and other libraries that pinpoint eyes, feet and other key points? I guess what I am really missing is a tensorflow library that can show me how far the body part is from the camera as well, that way I can have multiple people in front of the camera and can judge distances too