HISTORY IMAGE GENERATING SYSTEM, HISTORY IMAGE GENERATING METHOD, AND RECORDING MEDIUM IN WHICH IS RECORDED A COMPUTER PROGRAM

摘要

A history image generating system and method is configured such that a determining unit determines whether or not an image to be combined with a history image stored as a history is a digital watermark image, and when it has been determined by the determining unit that the image is a digital watermark image, a processing unit performs, with respect to the digital watermark image, processing including enhancement processing such that the visibility of the image is increased, and a generating unit generates an image in which the digital watermark image with respect to which processing has been performed by the processing unit and the history image are combined. Further, a recording medium stores a computer program that causes a computer to execute operation of each unit of this history image generating system.