Patent ID: 9665790
Date: 2017-05-30
CPC Classifications: G06F,G06K,G06T

Claim:
1. A method of analyzing a digital image to determine a descriptor describing the digital image, the method comprising: creating a plurality of scaled octave versions of the digital image; selecting a subset of feature points within multiple local extrema, wherein each feature point is selected from the plurality of scaled octave versions of the digital image and has an associated scale octave; creating a vector for each of the feature points, each feature point vector based on the normalized intensity values of a patch around the feature point, generating, for a particular feature point, a concatenated vector based on a plurality of feature point vectors, wherein the patches associated with each of the plurality of feature point vectors overlap the particular feature point; and creating a descriptor for the digital image based on the concatenated vector, wherein the descriptor is a compact representation of feature points defining the digital image.