Paper sheet discriminating apparatus and method
US6354507B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Sep 20, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/17
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
To provide a paper sheet discriminating apparatus and method capable of discriminating even a paper sheet such as a US dollar bill, in which the location of a pattern is dislocated from the periphery due to a printing shear or a cutting dislocation, efficiently without any drop of the discrimination percentage by using the image of the paper sheet. A paper sheet discriminating apparatus for deciding at least the kind of a paper sheet on the basis of its pattern by sampling the image of its whole surface. The dislocation of the pattern, as viewed from the contour, is detected on the basis of the marginal length of the paper sheet from the outer periphery to the pattern, thereby to correct a pixel position for providing a base point for the image recognition of the paper sheet, with the detected dislocation. Moreover, the difference of the marginal lengths is determined at the portion, where the channels at the identical position in the transfer direction and the lines in the transfer transverse direction are identical, to prevent an excessive correction by substituting a predetermined maximum when the difference is not less than a predetermined value, and to determine an average val…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.