1. An image processing method, in which a direction transforming process is performed on an image signal representing an image and in accordance with information giving specifics about an image recording technique, and in which a marker pattern represented by a marker signal is appended to the image represented by the image signal, the method comprising the steps of: i) determining a direction of the marker signal and an appending position of the marker signal in accordance with the information giving specifics about the image recording technique, and ii) appending the marker signal to the image signal in accordance with the thus determined direction of the marker signal and the thus determined appending position of the marker signal.