Patent ID: 9147127
Filing Date: 2015-09-29
Classification: G06K

Abstract:
1. A computer-implemented method, comprising: receiving, by a processor, a query image; extracting, by a processor, a plurality of query feature points from the query image, wherein each query feature point is a vector comprising an appearance-based descriptor, two spatial coordinates, a scale factor, and an orientation factor; matching, by a processor, the query feature points to one of a plurality of template feature points in a template image; calculating, by a processor, a confidence indicator for each query feature point match; mapping, by a processor, the confidence indicators within a four dimensional space divided into a plurality of bins, a first dimension of the four dimensional space corresponding to a first of the two spatial coordinates, a second dimension of the four dimensional space corresponding to a second of the two spatial coordinates, a third dimension of the four dimensional space corresponding to the scale factor, and a fourth dimension of the four dimensional space corresponding to the orientation factor; and determining, by a processor, that the query image contains a match to the template image when a number of confidence indicators in at least one of the plurality of bins is greater than a threshold value.