Filter approach to catheter electrode detection and tracking
US8831309B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2012 |
| Grant date | Sep 9, 2014 |
| Priority date | — |
| Expiry date | Feb 21, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/443
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method including receiving a first two-dimensional (2D) image; and applying a filter to the 2D image to produce a filtered image that identifies a circular object of interest, wherein the filter is based on the integral sum of the function S, where the filter output at point x iswhich is obtained from the 2D image, the function S is represented by S(m,θ,r,y)=S1(m)S2(θ,r), where m is a magnitude of a gradient at location y, r is a radial distance from y to x, and θ is an angle between the gradient at location y and the radial distance from y to x,C1 depends on a gray-level value of the object, C2 and σ depend on a size of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.