18. The non-transitory computer readable media of claim 17 , wherein generating a re-trained image relevance model comprises generating the re-trained image relevance model based on the visual features for the subset of training images and the assigned multiplier value.
17. The non-transitory computer readable media of claim 13 , the operations further comprising assigning a multiplier value to each image in the subset of training images, the multiplier value being greater than one.