Retouched or not? Tool spots photos' too-flawless features

The detector tool developed by Dartmouth College scientists measures geometric changes to a person's face and body - such as larger breasts, smaller hips, slimmer necks - as well as color and texture changes - like blurring and sharpening. Researchers wanted to find out just how much a model or celebrity has "strayed from reality."

Credit: Dr. Hany Farid