1. A method employing one or more computer processors to perform acts including: storing, within an object registry, model data and object metadata corresponding to a plurality of physical reference objects, the model data for each physical reference object including data characterizing plural non-coplanar surface regions of different extents and locations, and hybrid-P feature data, the model data also including, for each of several different physical reference objects, multiple sets of feature information, each set of feature information being associated with a particular viewpoint towards a physical reference object; obtaining query data representing a physical object-of-interest, wherein generation of the query data is initiated by a user, and said query data includes object profile data representing an edge of a silhouette of the physical object-of-interest; performing an object recognition process on the query data, the object recognition process including processing the query data, in conjunction with the stored model data, to determine whether the object-of-interest corresponds to any of the plurality of physical reference objects, said object recognition process including identifying plural sets of said feature information that may correspond to the query data, thereby identifying a first candidate set of plural physical reference objects that possibly match said physical object-of-interest, and performing a clustering operation on viewpoints associated with said identified plural sets of feature information, to determine a preliminary candidate viewpoint towards a matching physical reference object; the object recognition process further including, for each of said first candidate set of physical reference objects, obtaining reference object profile data corresponding to said preliminary candidate viewpoint, and for one or more additional viewpoints; and performing a profile matching operation to identify certain of said obtained reference object profile data that correspond to the object profile data representing the physical object-of-interest, thereby identifying a second candidate set of physical reference objects that possibly match said physical object-of-interest, said second candidate set being smaller than said first candidate set; and upon determining that the object-of-interest corresponds to at least one of the physical reference objects, transmitting a result to a user device associated with the user, the result including object metadata associated with the at least one of the physical reference objects determined to correspond to the object-of-interest; wherein the hybrid-P feature data is based on an accumulation of multiple profiles of the reference object from multiple viewpoints.