Method and apparatus for providing sensor compensation in a document scanner.

摘要

A document scanner (10) is disclosed wherein means (32,53,54) are provided to compensate for sensitivity nonuniformity that may exist between the individual sensor cells (22) of the sensor array (21) that is used to sense light that is reflected from the document (11) being scanned. The compensation method and apparatus compensates for both dark (i.e. unilluminated) sensitivity variation (51) and light (i.e. illuminated) sensitivity variation (52) that may exist in the individual sensor cells of the sensor array. <IMAGE>