Patent ID: 7719731

Claim:
An image reading apparatus comprising: a plurality of line sensors arranged to be mutually spaced in a sub scanning direction to scan an original in the sub scanning direction, wherein signals of the plurality of line sensors are composited together by the image reading apparatus to generate an image corresponding to the original; 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 from data from a first line sensor of said plurality of line sensors a feature pixel having a predetermined feature; a detector comparing pixels from data of said plurality of line sensors corresponding to a single location on the original to one another to identify the feature pixel as a noise pixel if the feature pixel is detected at said single location and no other feature pixel extracted from data of said plurality of line sensors other than said first line sensor data is detected at said single location; a second pixel extractor extracting, based on a value of a first pixel present in data from a second line sensor of said plurality of line sensors and corresponding to the same location on the original as said noise pixel, a second pixel present in data from said first line sensor for correcting said noise pixel; and a corrector correcting said noise pixel based on said extracted second pixel.