The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2008
Filed:
Aug. 10, 2004
Pascal Cathier, Exton, PA (US);
Pascal Cathier, Exton, PA (US);
Siemens Medical Solutions USA, Inc., Malvern, PA (US);
Abstract
A method of identifying spherical objects in a digital image is provided, wherein the image includes a plurality of intensities corresponding to a domain of points in a D-dimensional space. The method includes calculating a local cross-correlation between a point in the domain of the image and a Gaussian kernel about a neighborhood of the point; calculating a local standard deviation of the point in the image; calculating a local standard deviation of the Gaussian kernel; calculating a cross-correlation ratio by dividing the local cross-correlation by the product of the local standard deviation of the image and the local standard deviation of the Gaussian kernel; and analyzing the cross-correlation ratio to determine whether an object about said point is spherical. The cross-correlation ratio can take continuous values from −1 to 1, where a spherically symmetric Gaussian shaped object has a value of 1.