| US 7,590,271 B2 | ||
| System and method for automatic detection and localization of 3D bumps in medical images | ||
| Benjamin L. Odry, West New York, N.J. (US) | ||
| Assigned to Siemens Medical Solutions USA, Inc., Malvern, Pa. (US) | ||
| Filed on Oct. 14, 2005, as Appl. No. 11/250,227. | ||
| Claims priority of provisional application 60/622972, filed on Oct. 28, 2004. | ||
| Prior Publication US 2006/0093196 A1, May 04, 2006 | ||
| Int. Cl. G06K 9/00 (2006.01) | ||
| U.S. Cl. 382—128 [382/131] | 20 Claims |
| 1. A computer implemented method of detecting irregularities in a digitized image, the method performed by said computer comprising
the steps of:
providing a digitized image comprising a plurality of intensities corresponding to a domain of points on a 3-dimensional grid;
selecting a sub-volume of interest in said image;
growing a surface from a point in said volume of interest;
determining the local gradient of each point on said surface, and applying a local filter to said gradient;
determining a histogram of filtered gradients, and
detecting an irregularity by selecting those points corresponding to gradient histogram values above a threshold value.
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