1. A method comprising the steps of: training, using a first process running on at least one computing device, a first classifier using a first set of training images relating to a class of images; selecting, using the first classifier on the at least one computing device, a set of additional images from a source of additional images accessible to the at least one computing device; merging, using the at least one computing device, the first set of training images and the set of additional images to create a second set of training images; training, using a second process running on the at least one computing device, a second classifier using the second set of training images; classifying, using the second server, a set of unclassified images, using the second classifier thereby creating a set of classified images.