24. The mobile device of claim 23 , wherein calculating the rank includes: determining that a location of the first entity remains constant across images; and downgrading the rank in response to the determining.
23. The mobile device of claim 16 , wherein the instructions further include instructions that, when executed by the at least one processor, cause the mobile device to: calculate a rank for a first entity of the entities identified in the first portion based on an amount of time the first entity appears in the images.