Embodiments may include a reception processor that receives image data corresponding to an image including a plurality of image objects. A controller may determine whether image objects are in contact with a boundary of a printing area of medium, and, based on a result of the determination, may perform expansion processing on one of the plurality of image objects that is in contact with the boundary of the printing area of the medium to expand image objects in contact with the boundary of the printing area and does not perform expansion processing on image objects not in contact with the boundary of the printing area of the medium such image objects not in contact with the boundary of the printing area are not expanded. Expansion image data including the expanded image objects and image objects on which expansion processing is not performed may be generated and output.