Method and system for the correction of image defects of a scanner due to the movements of the latter
US5056020A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1989 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Sep 12, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/26
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is a method for the correction, in a scanner, of the defects due to the movements of the scanner. The method consists in having a rod which introduces a major attenuation and causing the scanner to make a full turn around a center of rotation O and obtaining m distinct views of the rod, each corresponding to an angular position .alpha..sub.j. The analysis of the signals of each view enables determining the angle .beta..sub.j of the rod. The knowledge of this angle .beta..sub.j leads to the computation of the coordinates b and c of the rod and the theoretical value .beta..sub.th of the angle .beta. for each view. The difference between the theoretical value .beta..sub.th and the measured value .beta..sub.j is used in the device for processing the scanner image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.