very low and it clearly yeah they're basically learned features so essentially it's based on the appearance of an instance of an object and there's pretty solid body of literature about how to have to try to learn those things but you tend to have learned through examples of people that look there's different constraints based on what type of like use you want to do but typically it's like you have similar instances you have the same instance of a person but from many different views and poses and and lighting and all that and then you