What Are the Importances of Using Artificial Intelligence to Read Images?

I wonder if screen readers are that sophisticated these days so that when you're browsing a site and it comes across a picture, it could explain in English what is in that picture. I'm not an expert on this point. So I don't think it can, however I could be wrong. A lot of the time what those technologies are missing is it's not actually what's in the picture. What is the intent behind why I've added this picture? And a lot of blog posts talk about describing also the emotion behind the picture.