| 摘要 |
A device (402) includes a field-detecting component (412), an input component (414), an accessing component (416), a comparing component (418) and an identifying component (420). The field-detecting component (412) can detect a field (406) and generate a detected field signature based thereon. The input component (414) can input (he detected field signature into a database (404). The accessing component (416) can access the detected field signature item the database (404). The comparing component (418) can generate a comparison signal. The identifying component (420) can identify item or location based on the comparison signal. The field-detecting component (412) can further detect a second field and generate a second detected field signature based on the detected second field. The comparing component (418) can generate the comparison signal based on a comparison of the detected field signature and the second detected field signature. |
