| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image identification tag for identifying an image without being affected by the photographic situation of an object image by reducing calculation costs by a template matching method and an image identification system equipped with the image identification tag. <P>SOLUTION: In an image identification system, a tag for image identification is provided with a circular luminance change pattern similarly changing to all directions at 360 degrees from a central point O, and the luminance change pattern is encoded and stored as a tag directional code, and the luminance change pattern of a partial image PG of extracted object image data D is encoded as a directional code, and the directional code is compared with the tag directional code so that the tag for image identification can be detected by a tag identifying device 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
