1. An image processing device comprising: an imaging unit configured to output an image generated by imaging a real space; a generating unit configured to generate an environment map representing a position of one or more objects existing in the real space based on the image and a feature data indicating a feature of appearance of each object; and a selecting unit configured to select at least one operable object recognized as being operable based on the object identification data as a candidate object being a possible operation target by a user.