Patent ID: 8542420
Filing Date: 2013-09-24
Classification: H04N

Abstract:
1. An image reading apparatus comprising: a monochrome CCD sensor provided along a main scanning direction and including a first photo-diode array configured to photoelectrically convert a light image of reflected light reflected from a document surface; plural color CCD sensors each provided along the main scanning direction at a physical interval apart from the monochrome CCD sensor in a sub-scanning direction and including a second photodiode array configured to photoelectrically convert the light image; an AD converter configured to apply analog-to-digital conversion to each of analog outputs from the second photodiode array of each of the color CCD sensors and the first photodiode array of the monochrome CCD sensor; a delay processing unit configured to delay at least one of color image data of plural colors output by the AD converter and interpolate, with delayed any one or more of the color image data, a blank of image data that is to be read on a line in the sub-scanning direction; and an inter-line correction unit configured to correct, by the intervals and a set reduction magnification, a positional deviation in the sub-scanning direction between the monochrome image data and the color image data of the plural colors, respective timings of which are aligned on the line by the delay processing unit.