11. The system of claim 10 , wherein the second program instructions are further to learn the plurality of pair-wise correlations between each pair of the plurality of annotated attributes by reverse learning a mapping of a set of labels of the annotated attributes to the images in the training dataset of images to predict respective sets of the training dataset images that each contain one of the annotated attribute labels.
10. The system of claim 9 , wherein a first of the annotated attributes is more heavily weighted than a second of the annotated attributes; and wherein the fourth program instructions are further to rank the retrieved plurality of images by ranking a one of the results with the more heavily weighted first attribute higher than another of the results that has the second attribute and a same total number of the attributes that are also within the query subset plurality of attributes.