Patent ID: 9697233
Date: 2017-07-04
CPC Classifications: G06F,G06K

Claim:
1. An image-processing method comprising: by operation of one or more processors, generating a first index that correlates first clusters of local feature descriptors with reference images among a set of reference images, the local feature descriptors being generated based on the set of reference images; by operation of one or more processors, generating a second index that correlates second clusters of local color descriptors with reference images among the set of reference images, the local color descriptors being generated based on the set of reference images, one of the local color descriptors being generated from a reference image among the set of reference images by concatenating color histograms generated from multiple regions of a mask that corresponds to a key point within the reference image; by operation of one or more processors, generating a third index that correlates descriptor pairs with reference images among the set of reference images, the descriptor pairs each representing a co-occurrence of a first cluster of local feature descriptors among the first clusters of local feature descriptors with a second cluster of local color descriptors among the second clusters of local color descriptors, wherein a descriptor pair includes local feature descriptor and a corresponding local color descriptor; by operation of one or more processors, determining that a query image matches the reference image based on the third index correlating a descriptor pair among the descriptor pairs with the reference image; and by operation of one or more processors, presenting the reference image determined to match the query image.