1. An image processing method comprising the steps of: generating background image data of a background image; extracting part image data from the background image data, which corresponds to a part of the background image; generating base character image data of a desired character image including at least one reflection portion; generating composite character image data of the character image in which the part of the background image is pasted on the at least one reflection portion, using the base character image data and the extracted part image data; and generating dynamic image data according to the background image data and the composite character image data in order to display a dynamic image of the background image and the desired character image on a preset display.