| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect the angle of a code pattern image even if the code pattern image used for acquisition of information embedded by forming a unit image on a recording medium rotates. <P>SOLUTION: This image processor has: an image acquisition part 20 acquiring the code pattern image; a noise removal part 21 removing noise from the code pattern image; a dot position detection part 22 detecting a dot position from the code pattern image; a reference dot pair detection part 23 detecting a dot pair having an especially short inter-dot distance as a reference dot pair; an angle detection part 26 detecting the rotation angle of the code pattern image on the basis of a tilt of the reference dot pair; and a decoding part 27 decoding the code pattern image on the basis of information such as the detected dot position or rotation angle, and outputting prescribed information. <P>COPYRIGHT: (C)2008,JPO&INPIT |
