I have a million images that are supposed to each show one person.
Problem: A few bogus images show nobody. A few other bogus images show several people without it being clear who the real subject is.
Question: Is there a tool or library or web service that can tell me whether an image shows mainly one person?
Examples of "good" pictures:
Note the before-last image: It contains other persons, but it is clear to a human eye who the main topic of the image is. But solutions that are not that smart are OK too.
Also note the engraving of a person on a horse: While the person's face and body are barely visible, a human easily understands that the image represents a person. False positives are excusable here, but a tool that understands that would be wonderful.
Examples of "bad" pictures:
Any operating system, any technology.