| 摘要 |
2116540 9307006 PCTABS00021 An identification system involves the labeling and then tracking of grouped items such as logs, shipping containers, or packets of mail and reporting the current location of identified items during transport, processing and storage. Machine readable labels (400, 500) are provided, adapted for recognition and reading from within a cluttered scene. These labels (400, 500) have bordering indicia - used for locating purposes - distinguishable from inner informative indicia. Typical bordering indicia include either a series of small, substantially similar marks like filled or hollow ovals or one circle or part of a circle, or a sequence of locating symbols or characters. Typical informative indicia include dots, bars, rings or regional text characters. Multiple coding methods and spatial (e.g. Latin Square) replication of indicia are used to minimize errors.
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