Meta AI image detector fails to identify some of its own cropped AI images, Reuters analysis finds

Reuters quoted Siwei Lyu about a Reuters analysis that found that Meta’s AI image detector failed to identify some of its own AI-generated images once they were cropped. Lyu had not evaluated Meta's tool but said that invisible watermark-based systems like Meta’s have limitations. “Watermark-based methods can be highly effective when the watermark remains intact, but any modification ​that removes or weakens the embedded signal — such as cropping, resizing, heavy compression, or ​editing — may reduce ⁠their effectiveness, depending on how the watermark is designed,” Lyu said.