I was involved in a project, and later a startup that looked at the process of 'captioning', or selectively describing what is on an image. A difficult problem. Microsoft is providing a camera app to this that would be interesting to test. I previously commented on their work in captioning, see the tag link, which also points to related methods in Open Source TensorFlow.
Microsoft launches Sprinkles, a silly camera app powered by machine learning by Sarah Perez
Microsoft is getting into the “fun camera app” game with a new iOS application called Sprinkles, which has now earned a featured spot in the “New apps we love” section of the App Store. The gist with Sprinkles, clearly aimed at a teen audience, is to offer a variety of traditional photo decorating tools like stickers, emoji and captions, but leverages Microsoft’s machine learning and A.I. capabilities to do things like detect faces, determine the photo subject’s age and emotion, figure out your celebrity look-a-like, suggest captions, and more. ... "