Patent ID: 6236827
Filing Date: 2001-05-22
Classification: G03G,H04N

Abstract:
An image forming apparatus which includes an image writing unit and forms an image on a recording medium carried on a conveyer that is being transported using the image writing unit, the image forming apparatus comprising;a controller which controls the image writing unit to form a registration mark at not less than two different positions in a main scanning direction perpendicular to a transporting direction in which the conveyer is transported;a detecting unit which detects each registration mark formed by the image writing unit;a deviation obtaining unit which obtains a deviation for each registration mark with respect to a reference position, in accordance with a detection result given by the detecting unit;a function formulating unit which formulates a correction approximation function from the deviation obtained by the deviation obtaining unit, the correction approximation function being used for determining individually image writing positions for each individual pixel of an image by the image writing unit;a writing operation correcting unit which controls the image writing unit to perform an image writing operation in accordance with the correction approximation function.