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. 12, 2005
Filed:
Jul. 16, 2001
Michael Elad, Haifa, IL;
Doron Shaked, Haifa, IL;
Michael Elad, Haifa, IL;
Doron Shaked, Haifa, IL;
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A method and apparatus for processing an image are disclosed. For edge detection, the zero crossing pixel location, n, within the image is identified. Then, a sub-pixel position offset, a, is determined. The offset is a relationship between interpolated image and an interpolated kernel at the zero crossing pixel location. Finally, the interpolated position for the edge location, t, is determined from the pixel location, n, and the sub-pixel position offset, a. For matching the detected edges of an object to edges of a model object, translation [v, v] between a detected edge of an object in the image and the corresponding edge of a model object is first determined. Next, cross correlation between the detected edge and the corresponding model edge is calculated. Then, translation error [e, e] is determined. Finally, the translation is updated.