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. 28, 2009
Filed:
Feb. 08, 2006
Yuhua Ding, Kirkland, WA (US);
Yuhua Ding, Kirkland, WA (US);
Mitutoyo Corporation, Kawasaki-shi, JP;
Abstract
A method for operating a video tool to perform precision edge detection in an image. The method includes determining estimated image intensity values corresponding to positions along a straight line aligned with a defined scan line orientation. The location of an edge point along the straight line is determined based on the estimated intensity values and their positions along the straight line. The method reduces sub-pixel orientation-dependent variations that may otherwise be present in edge measurements. Intensity values may be estimated by interpolating between nearest neighbor image pixel intensity values. When positions along the straight line are chosen to coincide with a pixel row or column, the interpolating may be linear interpolation between the intensities of just two adjacent pixels.