Image search device, image search method, electronic device and control method therefor

An image search device comprising a processor configured with a program to perform operations comprising:

• operation as a search request receiving unit for receiving an image search request;
• operation as a first selection unit for selecting from a plurality of images a first group of images that matches a search condition that is based on the search request;
• operation as a second selection unit for selecting from the first group of images a second group of images on the basis of a score calculated by a predetermined evaluation formula;
• and
• operation as a result output unit for outputting information about the second group of images as a search result;
• wherein
• each of the plurality of images comprises an image capable of being subjected to evaluative engagement through a predetermined internet service;
• and
• the predetermined evaluation formula is configured to increase the score for an image in the first group of images to the extent of positive engagement through the predetermined internet service and to increase the score to the extent that the image is less similar to other images in the first group of images.