Digital image orientation marker
US6354737B1 · kind B1 · utility
50Cited by
14References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Nov 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An orientation marker for a digital radiogram formed by a plurality of pixels arrayed along a plurality of rows and columns. The pixels have densities which represent the radiogram optical density at each pixel point, and the densities are represented by digital values. The marker is made by a number of marker pixels arrayed along at least one row and one column of the radiogram. Each of the pixels forming the marker, have a marker pixel digital value which has been selected to form an asymmetrical marker pixel pattern on the radiogram, replacing the original radiogram pixel values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.