IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD

PROBLEM TO BE SOLVED: To provide an image forming apparatus in which the productivity and the printing quality are improved. SOLUTION: An image forming apparatus comprises: an automatic document feeder (ADF) for carrying an original document; a scanner unit that includes a carriage having a light source unit for exposing and scanning the original document and is capable of operating in a first reading mode for reading image information of the original document carried by the ADF with the carriage fixed and a second reading mode for reading the image information of the original document by moving the carriage; a printer unit that processes the image information read by the scanner unit to form an image on a paper sheet; and a controller which controls the scanning velocity of scanning the original document at the time of reading, and differentiating the reading resolution of the original document in the first reading mode from the resolution of image formation by the printer unit to thereby make the reading resolution of the original document in the second reading mode substantially equal to the resolution of image formation by the printer unit. COPYRIGHT: (C)2008,JPO&INPIT