This extension uses Microsoft Cognitive Services to scan images on a webpage and put a description in the alt-text, if it is empty.…This extension uses Microsoft Cognitive Services to scan images on a webpage and put a description in the alt-text, if it is empty. Users can choose which details they desire from gender, age, glasses, facial hair, and emotion. These values are guesses made by Microsoft, so please do not be offended if any attributes are incorrect.