Patent ID: 6276605
Filing Date: 2001-08-21
Classification: G06K,H04N

Abstract:
Apparatus for reading encoded symbols, comprising:an integrated chip fabricated using a CMOS process, said integrated chip comprisingan imaging array including a plurality of photosensitive cells;a clock generator connected to said imaging array;a common output bus connected to said imaging array;an address generator connected to said imaging array, whereby said photosensitive cells are accessed according to a pattern;an amplifier connected to said common output bus, said amplifier outputting an imaging signal comprising a sequence of pixel output values corresponding to an amount of light collected at each photosensitive cell of the imaging array; andan edge detector connected to said amplifier, said edge detector comprising circuitry for detecting transitions between relatively higher and relatively lower amplitudes in said imaging signal corresponding to darker and lighter portions of a symbol being read; anda symbology decoder coupled to said edge detector.