Image reading device generating black correction data for shade correction based on intermediate data acquired at different positions in the sub-scanning direction
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United States of America Patent
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Mar 27, 2018
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N/A
app pub date -
Nov 8, 2016
filing date -
Mar 27, 2015
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Abstract
An image reading device has an image processor that generates correction data to be used for shading correction and performs the shading correction using the correction data. The image processor generates intermediate data with a predetermined density level, generates intermediate data in different positions in the sub-scanning direction based on image signals of a first reference plate and a second reference plate disposed in the different positions, generates first and second black correction data based on the respective intermediate data, generates black correction data according to the sub-scanning direction based on both the black correction data, and performs the shading correction using the black correction data in the respective positions in the sub-scanning direction.
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Cited Art Landscape
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