Patent ID: 6885755
Filing Date: 2005-04-26
Classification: G06T

Abstract:
1. An information processing method for embedding a pattern image in a main image in such a state that is not recognizable to the naked eye of a human being, comprising: preparing main image information that is recognizable to the naked eye of a human being; preparing pattern image information; executing color difference modulation processing for the pattern image information in accordance with a color modulation amount, such that a first color alternates with a second color complementary thereto; superimposing the pattern image information modulated in color difference by the color difference modulation processing on the main image information, thereby preparing synthetic image information such that a synthesized state is not recognizable to the naked eye of the human being; and recording the synthetic image information on a recording medium as a visible image; wherein existence of the pattern image in the recording medium becomes recognizable to the naked eye of a human being when the synthetic image information recorded on the recording medium is physically superimposed with and moved relative to a mask sheet having the same pattern of light transmission distribution ratio as the pattern image information.