1. System for identifying an item, comprising a digital image processing unit including a memory and operable to: select at least one zone of a digital image of said item; establish, for each selected zone, a corresponding histogram of color values of the pixels of said zone, said digital image processing unit being further operable to: compare, for each bin of each established histogram, the number of pixels with corresponding minimum and maximum reference values of a reference data set stored in the memory and associated to a reference item, and determine whether said number of pixels is comprised between said reference values; and identify the item as corresponding to said reference item if said number of pixels is comprised between said reference values for at least N of said bins, with N≧1, of at least one zone.