Image reading apparatus creating shade correction data based on intermediate shade data and sensing a reference member a plurality of times
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United States of America Patent
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Mar 13, 2018
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N/A
app pub date -
Dec 12, 2016
filing date -
Mar 26, 2015
priority date (Note) -
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Abstract
An image reading apparatus includes: a sensor module which includes a light source and sensors; a reference member for creating black correction data and white correction data; and an image processor. The image processor corrects uneven density of an image resulting from interference of image signals from the sensors, by performing, on the image signals obtained by the sensors, shading correction using black correction data and white correction data. The image processor obtains causes the sensors to obtain image signals of the reference member, and creates the white correction data based on white data, and the black correction data based on intermediate data. At least one of when creating the white correction data and when creating the black correction data, the image processor causes the sensors to obtain image signals of the reference member a plurality of times.
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