| 摘要 |
<p>PROBLEM TO BE SOLVED: To generate image data capable of correctly decoding and having a superposed data pattern of suppressed visibility according to the content of the image data.SOLUTION: An output unit 18 outputs image data having a dot pattern superposed thereon, when predetermined information is coincident with dot portion information which is obtained by coding the predetermined information and decoded by a decoding unit 39. When predetermined information is not coincident with dot portion information, obtained by coding the predetermined information and decoded by a decoding unit 39, a concentration adjustment unit 36 performs adjustment to relatively increase the concentration only in the dot position of the dot pattern superposed on the image data. The output unit 18 outputs the adjusted image data.</p> |
