| 摘要 |
Additional information, composed of characters, images, voice, etc., is converted into two-dimensional codes (step S104) and then converted into a visible additional image to be embedded (step S105). The additional image is embedded in a full-color main image in a state of invisibility to produce a composite image (step S106). The composite image is recorded on a non-electronic medium such as paper or on an electronic medium, such as a memory on a personal computer, over the Internet (step S108). The embedded additional image is extracted from the composite image recorded on the recording medium and the additional information is reproduced (steps S109, S113). <IMAGE> |
