I am pretty certain at this point that I want to do something food and image processing related. This evolved out of my first idea (MyOrder), but is not quite the same.
I want to do some sort of auto image processing to make food look better, and provide an interface/API to use the service. I have found a very large dataset that could help with that, albeit unlabeled. There also is research done on labeling food images as good-loking/not-good-lookingm, which I could use to label the food.
I have two other ideas I will consider (as long as I am still allowed to consider). The first is an app that can tell the ingredients of food and/or some kind of shazaam for food that tells what dish a certain dish is. The other is an app that counts calories by looking at pictures of the food you eat.