| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce density unevenness by a pattern image showing identification information without affecting the decoding rate of identification information. <P>SOLUTION: The device comprises an information acquisition part 11 which acquires identification information, X-coordinate information, Y-coordinate information, and expansion information; an identification code generation part 12 which generates an identification code by encoding the identification information; an X-coordinate code generation part 13 which generates an X-coordinate code by encoding the X-coordinate information; a Y-coordinate code generation part 14 which generates a Y-coordinate code by encoding the Y-coordinate information; a pseudo random number code generation part 18 which generates a pseudo random number code from an expansion code obtained by encoding the expansion information, the X-coordinate code and the Y-coordinate code; a code alignment generation part 15 which generates a code alignment in which a code obtained by superimposing the pseudo random number code over the identification code, a synchronous code, the X-coordinate code, and the Y-coordinate code are aligned; and a code image generation part 17 which generates a code image by selectively arranging a pattern image corresponding to each code from a pattern image storage part 16. <P>COPYRIGHT: (C)2009,JPO&INPIT |
