Patent ID: 7493072

Claim:
An image forming device which transfers a developed electrostatic latent image formed on a photoconductor according to input image information, to an intermediate transfer body, and forms an output image, the image forming device comprising: a correction unit configured to correct an image formation operation based on a plurality of correction patterns: a pattern creation unit configured to form a developed electrostatic latent image of the correction patterns on the photoconductor and to transfer the developed electrostatic latent image of the correction patterns, to the intermediate transfer body to form the correction patterns thereon; a pattern detecting unit configured to detect the correction patterns formed on the intermediate transfer body by the pattern creation unit; a speed detecting unit configured to detect a movement speed at which the correction patterns formed on the intermediate transfer body are moved; and a timing holding unit configured to compute a set value of detection start timing for starting detection of each of the correction patterns by the pattern detecting unit, to hold the computed set value, wherein the correction unit is configured to determine, in advance of correcting the image formation operation based on the correction patterns, a detection start timing based on the movement speed detected by the speed detecting unit and the set value held by the timing holding unit.