1. A method for correcting image rendering data, comprising: preparing image rendering data having position coordinates that determine an image rendering region on an image rendering object, and having base position coordinates that show a position of a base point arranged in the image rendering region on the image rendering object; after a physical deformation of the image rendering object, using a CPU to perform obtaining a displacement state of the position coordinates on the image rendering object; correcting the base position coordinates based on the displacement state of the position coordinates on the image rendering object; and correcting the position coordinates of the image rendering region based on the base position coordinates, while maintaining a shape of the image rendering region.