Patent ID: 8019245

Claim:
An image forming device, comprising: an image forming unit including a sheet carrying body and an image transfer unit configured to form the image on the sheet carrying body; a detection unit configured to detect a correction pattern formed on the sheet carrying body; a storage unit configured to store a result of detection by the detection unit; and a correcting unit configured to cause the image forming unit to form the correction pattern and configured to perform a correction process for correcting an offset of a position where the image is formed by the image forming unit by detecting the correction pattern with the detection unit, wherein the correcting unit divides a peripheral surface of the sheet carrying body into a plurality of regions in a circumferential direction, causes the image forming unit to form a correction pattern on a first region of the plurality of regions, the first region being different from a second region of the plurality of regions, on which a correction pattern has been formed in a previous correction process, and corrects in the correction process an offset of a position where an image is formed by the image forming unit, based on a detection result obtained by detecting the correction pattern formed on the first region and a detection result obtained by detecting the correction pattern which has been formed on the second region in the previous correction process.