Image reading device generating black correction data for shade correction determined at positions in the sub-scanning direction based on intermediate data and stored reference black correction data
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United States of America Patent
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Mar 27, 2018
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app pub date -
Nov 29, 2016
filing date -
Mar 27, 2015
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Abstract
An image reading device includes an image processor that generates correction data to be used for shading correction and perform the shading correction using the correction data, and a memory that stores first black correction data to be used for the shading correction in a main scanning direction in a predetermined first position in a predetermined sub-scanning direction. The image processor generates third black data based on an image signal of a second reference plate extending in the sub-scanning direction in a predetermined second position in the main scanning direction, generates black correction data according to the sub-scanning direction based on the first black correction data and the third black data, and performs the shading correction using the black correction data so as to correct density unevenness in the main scanning direction and the sub-scanning direction caused by an interference between image signals from a plurality of sensors.
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