Caption on the first image : >when perturbed by a seemingly random pattern across the entire picture (middle), with the intensity magnified for illustrative pu

Caption on the first image : >when perturbed by a seemingly random pattern across the entire picture (middle), with the intensity magnified for illustrative purposes I don't understand? The pattern is not "seemingly random", it is "seemingly chosen to have subtle cat-features". One sees the ears at the top of them image and face-like features below. So, is it "we perturbed images to overlay cat-like features on a visual level that humans don't generally perceive but ML models were able to perceive; and then ML models perceived them"? Can someone précis the results and why they're interesting because on the face of it this seems like a very obvious outcome? Do I need to make a new year resolution to actually read the articles?