Control circuit of image reader, image reader, control method of image reader, and program

摘要

A control circuit of an image reader having at least one light source includes: a light source control portion that controls ON and OFF of the light source by performing current switching for adjusting a value of a current supplied to the light source; a black reference data creating portion that creates black reference data used for shading correction under control of the light source control portion; an image reading portion that reads image data under control of the light source control portion; and a shading correction portion that performs shading correction of the image data using the black reference data. The black reference data creating portion adds a noise, which is equivalent to a noise added to the image data by the current switching, to the black reference data, and the shading correction portion removes the noise added to the image data by performing the shading correction.