Image forming apparatus and control method thereof

Abstract

An image forming apparatus and a control method thereof are disclosed. The disclosed image forming apparatus includes a white reference sheet provided at one side of a flat bed, for scanning an object, an image sensor module including an image sensor to detect light reflected from the white reference sheet in a scanning operation for the white reference sheet and light reflected from an image on the object in a scanning operation for the object, and to output analog image signals respectively corresponding to the reflected lights, an analog front end (AFE) to convert each analog image signal output from the image sensor to a digital image signal, a shading memory to store shading data obtained in the scanning operation for the white reference sheet, and a controller to calculate differences among outputs from R, G, and B channels of the image sensor, using the stored shading data, to correct the stored shading data, based on the calculated output differences, and to correct image data outputs generated from the R, G, and B channels in the scanning operation for the object, based on the calculated output differences. The image forming apparatus can correct different physical offset values possibly present at different color channels in a color scanning operation. Accordingly, it is possible to adjust the color balance of a scanned image, and thus to achieve an enhancement in the color quality of the image.