1. Method for identifying an item, comprising the steps of: a) selecting at least one zone of a digital image of said item; and b) for each zone selected at step a), establishing a corresponding histogram of color values of the pixels of said zone, said method further comprising the steps of: c) for each bin of each histogram established at step b), comparing the number of pixels with corresponding minimum and maximum reference values of a reference data set associated to a reference item, and determining whether said number of pixels is comprised between said reference values; and d) identifying 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.