Conventionally, it is impossible to securely and efficiently implement the judgment of specific images. In order to solve this task, an image processing apparatus according to the present invention is characterized in including an input unit (in these embodiments, this corresponds to, for example, the interface unit in FIG. 1) for inputting color image data, an judging unit (this corresponds to, or example, the forgery judging unit in FIG. 1) for judging whether the judgment of whether a color image composed of the color image data is a specific image has been already performed, and an image judging unit (this corresponds to, for example, the forgery judging unit in FIG. 1) for judging whether the color image include the specific image if the judgment has not been performed yet.