Patent ID: 8085451
Filing Date: 2011-12-27
Classification: H04N

Abstract:
1. An image reading apparatus comprising (i) a capturing device operable to capture an original image carried on a source document and (ii) a moving device operable to move at least one of said capturing device and the source document relative to the other in a movement direction, such that an image reading routine is carried out by repeating an capturing operation and a moving operation that are performed by said capturing device and said moving device, respectively, said image reading apparatus further comprising a controller that includes: (a) a first region processing portion configured to cause said moving device to position said capturing device in a first capturing position relative to the source document, so as to obtain a first pixel-related data relating to pixels present in a first region of the source document that is located on a side of one of opposite ends of the source document; (b) a background-color-basis correcting-value determining portion configured to determine a background-color-basis correcting value, based on the first pixel-related data; and (c) a second region processing portion configured, after the first pixel-related data has been obtained by said first region processing portion, to cause said moving device to position said capturing device in a second capturing position relative to the source document, so as to obtain a second pixel-related data relating to pixels present in a second region of the source document that is located between the first region and the other of the opposite ends of the source document, wherein said second region processing portion is configured to correct the second pixel-related data, for reducing influence on the second pixel-related data by a background color of the source document, such that the second pixel-related data is corrected, by said second region processing portion, based on the background-color-basis correcting determined based on the first pixel-related data that has been obtained by said first region processing portion.