insidecity_art1363.jpgspatial_envelope_256x256_static_8outdoorcategoriesAude Oliva and Antonio Torralba, IJCV 2001, vol 42(3).LabelMe Webtoolbuilding0020-Nov-2006 18:41:570anonymous2256212561256256door0020-Nov-2006 18:41:571anonymous8210220810520725578255