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:
Nov. 29, 2016
Filed:
Jul. 07, 2015
Raytheon Company, Waltham, MA (US);
Timothy Edward Caber, Tucson, AZ (US);
Raytheon Company, Waltham, MA (US);
Abstract
It is often desirable to register a first image to a second image, such as to form a panoramic image. The image registration technique discussed herein forms first and second gradients of the first and second images, respectively, then aligns phase vectors of the first and second gradients by estimating the parameters of a projective (homographic) coordinate transformation that can map the first gradient to the second gradient. The estimated parameters can be used to map the first image to the second image. In some examples, each gradient pixel includes a complex number, such as a unit vector, having a normalized amplitude and a phase vector that indicates the direction of greatest change, at that pixel, for the respective image. Aligning the image gradient phase vectors, rather than image intensity values, can align images produced under different lighting conditions, and/or produced in different wavelength regions of the electromagnetic spectrum.