Arrangement for checking documents
US5020110A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1989 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Jan 24, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/17
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An arrangement for checking or examining bank-notes or similar documents include a detector, such as a CCD array of, for example, 256 photocell devices. The documents are scanned by the photocell devices transversely of their longitudinal extent. The signals are digitized by an analogue/digital converter (2), such that the output of each photocell device is represented only by one digital bit. The analogue/digital converter (2) further defines horizontal and vertical edges of the documents and of printed images thereon, and passes the digitized signals including that of the defined edges to a position detector (6) and to a memory (4). The position detector (6) delimits the signals digitized by the analog/digital converter (2) and filtered by a filter (3) by admitting into the memory (4) for storage sixty four picture elements of selected document information with respect to vertical and horizontal outer edges as a window of 64 by 64 picture elements. A side detector (8) is coupled to and receive scanned information from the position detector (6) makes a preliminary determination as to the denomination of the document and as to which side of the document has been read. This prelimin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.