IMAGE SEARCHING APPARATUS, CLASSIFIER TRAINING METHOD, AND PROGRAM

An objective is to search not only for images classified into a same class but also images that are similar to one another from a predetermined standpoint such as appearance. An image searching apparatus (100) includes a label attacher (13) to attach, to an image with a first correct label attached thereto, a second correct label, the first correct label being a correct label attached to each image included in an image dataset for training for use in supervised training, the second correct label being a correct label based on a degree of similarity from a predetermined standpoint; a main trainer (14) to train a classifier (11) by using the images and one of the first correct label and the second correct label, a fine-tuner (15) to fine-tune a training state of the classifier (11); trained by the main trainer (14), by using the images and the other one of the first correct label and the second correct label; and a searcher (16) to search, by using the classifier (11) that is fine-tuned by the fine-tuner (15), for images similar to a query image.