Patent ID: 8310733
Filing Date: 2012-11-13
Classification: H04N

Abstract:
1. An image reading apparatus, comprising: an illumination unit that illuminates a reading position; a color reading unit that includes a plurality of line sensors corresponding to respectively differing color components, the reading unit receiving reflected light from an original on the reading position and outputting a plurality of color component data; a monochrome reading unit that receives reflected light from an original on the reading position and outputs monochrome data, wherein an image transfer frequency of the monochrome reading unit is higher than an image transfer frequency of the color reading unit a determining unit that determines a mode for reading the original, wherein the mode includes a color mode for reading the original and for outputting the plurality of color component data, and a monochrome mode for reading the original and for outputting the monochrome data; and a reading control unit that controls reading of the original in accordance with the mode determined by the determining unit, wherein responsive to the color mode, the reading control unit reads the original using the color reading unit and outputs the plurality of color component data, wherein responsive to the monochrome mode and a determination that light amount of the illumination unit satisfies a threshold value, the reading control unit reads the original using the monochrome reading unit and outputs the monochrome data, and wherein responsive to the monochrome mode and a determination that light amount of the illumination unit does not satisfy the threshold value, the reading control unit reads the original using the color reading unit and outputs the monochrome data.