Patent Document ID: 20130028519
Application ID: 13193988
Patent Status: 0

Claim One:
1. A method for registering a first image and a second image, comprising: generating a blurred first image; applying a coarse grid to the blurred first image; computing a determinant of a Hessian matrix at predetermined points of the coarse grid on the blurred first image; determining low resolution feature points in the blurred first image; determining high resolution feature points in the blurred first image; creating a first set of blurred first image key points; extracting a first feature descriptor for each of the blurred first image key points; generating a blurred second image; applying the coarse grid to the blurred second image; computing a determinant of a Hessian matrix at predetermined points of the coarse grid on the blurred second image; determining low resolution feature points in the blurred second image; determining high resolution feature points in the blurred second image; creating a second set of blurred second image key points extracting a second feature descriptor for each of the blurred second image key points; selecting blurred first image key points and blurred second image key points for matching based on a measure of closeness of the first feature descriptors and the second feature descriptors; and mapping the first image into the second image based on matching pairs of blurred first image key points and blurred second image key points.