Every day, fake pictures are getting more realistic. Today, anyone can access a web-based program like Midjourney or Dall-e and create artificial or manipulated images without much effort. The good news is that humans have a natural instinct for sniffing them out, according to Siwei Lyu, professor of computer science and engineering at the University at Buffalo. Lyu belongs to a group of researchers battling AI with AI—they’ve found the best way to teach an AI to find synthetic images is to show them how humans do it. We’ve been dealing with falsified images for a very long time. Image manipulation has been around just about as long as photography itself. What’s changed is how easy it is for someone without expertise to create something that appears genuine—resulting in an intimidating volume of synthetic images. But Lyu urges us not to panic. Here’s how to use our natural instincts to find things that aren’t quite right—and how to keep up with the lightning speed of AI advancement.
If there is a person in an image, look at their hands and eyes. Current AI programs aren’t good at producing lifelike hands—they may have six fingers, or fingers that are all the same length or in a strange pose. In March, an AI-generated image of Pope Francis wearing a Balenciaga puffer coat went viral. If you look closely at his hand, he’s holding his coffee by the lid’s tab—a strange way to hold it, even if the cup was empty. And why the eyes? Humans are really sensitive to minute characteristics of the face. Humans almost always have circular pupils, but AI often produces strangely shaped shadows in the center of the eye. Light reflecting off the eyes should also be in the same place on each eye, something that current AI struggles with.
Disponível em: https://www.nationalgeographic.com. Acesso em: 22 abr. 2023.
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