Method of removing moiré in fluoroscopic X-ray image and X-ray imaging equipment using the same
US8538118B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2009 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Oct 18, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30004
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Provided is a method of removing a moiré in a fluoroscopic X-ray image that preliminarily complements a defective pixel with no disturbance in regularity of a moiré pattern to ensure that no trace of the defective pixel and no ghost thereof create even when the fluoroscopic X-ray image contains the defective pixel. A moiré frequency derivation section determines frequency of the moiré that appears in the fluoroscopic X-ray image, a defective pixel preliminary complement section forms a preliminary complement image, a moiré removal section conducts frequency analysis of the preliminary complement image to form a moiré removed image, an image smoothing section performs an image smoothing process to the preliminary complement image to form a smoothed image suitable for complement of the defective pixel, and a first defective pixel recomplement section recomplements the defective pixel by superimposing the moiré removed image on the smoothed image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.