Process and apparatus for automatically identifying discount coupons and the like by means of electronic comparison

摘要

A process and apparatus for identifying and separating discount coupons having particular zones of color depths, shades, tonalities or the like in which both sides of the coupons are read by scanning and zones of like tones are summed to mathematically form an algorithmic "word" for comparison with a "sample word" for the identification of valid coupons.