Image processing apparatus, method, and medium to perform image smoothing and brightness correction to remove show through
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United States of America Patent
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Feb 7, 2017
Grant Date -
Dec 24, 2015
app pub date -
Jun 19, 2015
filing date -
Jun 23, 2014
priority date (Note) -
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Abstract
An image processing method includes reading a document on which a halftone-processed image is printed, performing smoothing processing on image data acquired by reading the document, setting a target region of a predetermined size to the smoothed image data and then calculating a degree of variation in signal values of a plurality of pixels included in the target region, determining a brightness correction amount for the target region based on the calculated degree of variation and the signal values of the plurality of pixels included in the target region, and performing brightness correction on the target region in the image data acquired by reading the document, based on the determined brightness correction amount.
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