5. The method of claim 1 , wherein determining to add the query image to the corpus of training images comprises: determining that the query image is characterized as a matched image; and in response to determining that the query image is characterized as a matched image, determining to add the query image to the corpus of training images.
6. The method of claim 5 , wherein determining that the query image is characterized as a matched image comprises determining that the similarity score that reflects the level of similarity between the query image and the respective training image exceeds the threshold.