A method for correcting image rendering data includes preparing image rendering data having position coordinates that determine an image rendering region and base position coordinates that show the position of a base point arranged in the image rendering region; obtaining a displacement state of position coordinates on an image rendering object; based on the obtained displacement state of position coordinates on the image rendering object, correcting the base position coordinates; and based on the corrected base position coordinates, correcting the position coordinates of the image rendering region while the shape of the image rendering region is maintained.