AI generative tools are based on machine learning techniques that can learn from data and produce outputs that are not explicitly programmed. Some of the common techniques used by AI generative tools are:
All AI detection tools perform imperfectly, and may make mistakes. It can often be a good idea to test a suspicious image on multiple platforms, to see if there is consensus. Even this can sometimes be misleading. It is important to bring in context and other evidence when making such judgements.
Images from DALL-E 2, Time Magazine's Best Inventions of 2022, Artificial Imagination, OpenAI DALL-E 2