| http://www.w3.org/ns/prov#value | - In such readers the size of the detector is typically smaller than the symbol to be read because of the image reduction by the objective lens in front of the CCD. The entire symbol is flooded with light from a light source such as light emitting diodes (LED) in the scanning device, and each CCD cell is sequentially read out to determine the presence of a bar or a space.
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