Radiographic marker location
AssigneeCanon Kabushiki Kaisha
InventorsSrinivasan Gopalasamy, Alexander Berestov
Life of this patent
Estimating the term…
Abstract
One or more fiducial marker projections are located in a radiographic image, where the radiographic image is stored as digital image data. The digital image data is filtered with a grayscale morphological filter to enhance potential fiducial marker projections. The filtered digital image data is segmented into one or more seed regions, where each of the one or more seed regions contains a potential fiducial marker projection. The potential fiducial marker projection within each of the one or more seed regions is analyzed and verified and a location of a fiducial marker projection within the radiographic image is determined for each verified potential fiducial marker projection.
Claims16
A method for locating one or more fiducial marker projections in a radiographic image, the radiographic image being stored as digital image data, the method comprising the steps of:
- filtering the digital image data with a grayscale morphological filter to enhance potential fiducial marker projections;
- segmenting the filtered digital image data into one or more seed regions, each of the one or more seed regions containing a potential fiducial marker projection;
- analyzing the potential fiducial marker projection within each of the one or more seed regions to verify the potential fiducial marker projection;
- and
- determining a location of a fiducial marker projection within the radiographic image for each potential fiducial marker projection verified in said analyzing step.
Dependencies are inferred from the claim text.