Image emphasis processing method and apparatus
US5953461A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Aug 18, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A morphology operation is carried out on an original image signal representing a radiation image, and a morphology signal is thereby obtained. An edge signal, which represents a characteristic value with respect to an image edge portion in the radiation image, or a specific image signal, which represents a characteristic value with respect to a specific image portion having a contour of a predetermined size, is obtained from the morphology signal and the original image signal. An emphasis coefficient corresponding to the edge signal or the specific image signal is calculated from a conversion table. The conversion table is set such that the emphasis coefficient may take a positive value when the value of the edge signal or the specific image signal is larger than a predetermined threshold value. The conversion table is corrected such that, as a dose of radiation delivered during an operation for recording the radiation image becomes small, the threshold value may become large.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.