WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the process of translating photographs into a digital form that can be recognized by a computer
noun.
the act of systematically moving a finely focused beam of light or electrons over a surface in order to produce an image of it for analysis or transmission
Word Usage
"To analyze that data, officials are doing what one described as scanning the treetops for the most immediate intelligence'' that points to possible imminent threats."