Patent Number: 6,490,375

Title: Methods for finding peaks in a characteristic surface of an image

Abstract: An efficient and reliable method that identifies possible reference sites in an image is disclosed. The method emphasizes customizing the identification of reference sites for each application by providing for initialization of various parameters, such as the size of the reference site. The method then uses a series of measurable parameters to filter possible reference sites in the image and produces and ordered set of possible reference sites. The highest-ranking site of the ordered set is expected to be chosen as the reference site for production. A preferred implementation is disclosed that uses multi-resolution images to enhance efficiency of the identification and that specifically measures the symmetry, orthogonality and uniqueness of the windows.

Inventors: Garakani; Arman (Wellesley, MA), Taycher; Leonid (Brighton, MA)

Assignee: Cognex Corporation

International Classification: G06K 9/46 (20060101); G06K 009/00 (); G06K 009/38 (); H04N 005/232 (); H04N 001/00 (); G06F 007/00 ()

Expiration Date: 12/03/2019