US 2006/0066915 A1Published application

Image reading apparatus reading an original while transporting the same

AssigneeKonica Minolta Business Technologies, Inc.

InventorsMasaaki Saka, Kazuhiro Ishiguro, Takayuki Nabeshima

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Abstract

An image reading apparatus includes, with the purpose of accurately correcting noise in an image due to dust on a platen, three line sensors spaced from each other in a sub scanning direction to scan an original in the sub scanning direction, a platen between the original and the three line sensors, a moving mechanism for moving the platen, a noise detection processor detecting a noise pixels from each of multiple data output from the three line sensors, a selector selecting one of a plurality of search ranges defined with reference to the noise pixel, and a corrector extracting a reference pixel for correcting the noise pixel from the selected search range to correct the noise pixel based on the value of the extracted reference pixel.

Claims18

Dependent claims

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;
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;
a detector detecting a noise pixel based on a plurality of data output from said plurality of line sensors;
a selector selecting one of a plurality of search ranges defined with reference to said noise pixel;
a reference pixel extractor extracting, from said selected search range, a reference pixel for correcting said noise pixel;
and
a corrector correcting said noise pixel based on a value of said extracted reference pixel.

5 more elements

Dependencies are inferred from the claim text.