Patent Document ID: 20060066918
Application ID: 11019181
Patent Status: 0

Claim One:
1. An image reading apparatus comprising: a plurality of line sensors mutually spaced in a sub scanning direction to scan an original in the sub scanning direction; a platen arranged between the original and said plurality of line sensors; a mover moving said platen at a rate relative to said plurality of line sensors, said rate being different from that of the original relative to said plurality of line sensors; an extractor extracting a feature pixel having a predetermined feature from each of a plurality of data output from said plurality of line sensors; and a detector comparing said plurality of data corresponding to a single location on the original to detect said feature pixel extracted from one of said plurality of data, as a noise pixel if said feature pixel is not a feature pixel for each of said plurality of data other than said one of said plurality of data, wherein said detector includes a determiner determining that a value of a first pixel of one of said plurality of data and that of a second pixel related to said first pixel has a predetermined relationship, and if said feature pixel extracted from one of said plurality of data further satisfies a condition for determination by said determiner, said feature pixel is detected as a noise pixel.