Specifications

222
Error correction for 2D symbols
The CMOS Imager is provided with an error correction function that can handle various types of
damage to symbols, such as that caused by dirt and dust, scratches, faintness, etc. However, this
function can only handle damage that appears locally in the symbol area, and is not effective if the
entire symbol is soiled or faint.
Furthermore, it is not possible for the Imager to read symbols if a cutout mark required for
detecting the symbol position is obscured.
Fig. 5.9