| 摘要 |
A certain amount of unique data of a target is extracted from image information that was read, and it is determined whether or not the target is valid on the basis of the extracted unique data. Processes are executed by means of an image reading unit (201) which extracts an image by scanning a target, an individual difference data calculating unit (202) which calculates individual difference data from the obtained image, an individual difference data comparing unit (203) which compares the calculated individual difference data, and a determination unit (204) which determines whether or not to grant validation. |
