Before revision:  Considering the expansion of robot applications in more complex and dynamic environments,it is evident that it is impossible to pre-program all possible object categories . Robots will have to be able to learn new object categories in the field.
After revision:  Considering the expansion of robot applications in more complex and dynamic environments,it is evident that it is not possible to pre-program all possible object categories . Robots will have to be able to learn new object categories in the field.