1. An image quality adjustment information generation method that generates image quality adjustment information with regard to objective image data, which is laid out on ornamental image data, said image quality adjustment information generation method comprising: obtaining the ornamental image data; analyzing the obtained ornamental image data to acquire an image quality characteristic of the ornamental image data; and writing the acquired image quality characteristic into layout control information, which is related to the ornamental image data and specifies a layout location and layout dimensions of the objective image data to be laid out on the ornamental image data.