Image search device, image search method, and image search program

An image search method comprising:

• receiving an input of finding information indicating at least one finding, which is desired to be searched for, on a query base image, which includes a part desired to be searched for and is a source of a query image, to derive the query image to which the finding has been added;
• deriving at least one added finding feature amount indicating an image feature for the abnormality of the finding added to the query base image;
• deriving at least one query normal feature amount indicating an image feature for a normal region included in the part in the query base image;
• deriving, with reference to an image database in which a plurality of reference images which include findings and in which at least one reference finding feature amount indicating an image feature for the abnormality of the finding included in each of the reference images and at least one reference normal feature amount indicating an image feature for a reference image in which the finding included in each of the reference images is a normal region are associated with each other have been registered, a similarity between the query image and each of the plurality of reference images on the basis of comparisons between the added finding feature amount and the query normal feature amount, and the reference finding feature amount and the reference normal feature amount;
• and
• extracting the reference image that is similar to the query image as a similar image from the image database on the basis of the similarity.

A non-transitory computer-readable storage medium that stores an image search program causing a computer to execute:

• a procedure of receiving an input of finding information indicating at least one finding, which is desired to be searched for, on a query base image, which includes a part desired to be searched for and is a source of a query image, to derive the query image to which the finding has been added;
• a procedure of deriving at least one added finding feature amount indicating an image feature for abnormality of the finding added to the query base image;
• a procedure of deriving at least one query normal feature amount indicating an image feature for a normal region included in the part in the query base image;
• a procedure of deriving, with reference to an image database in which a plurality of reference images which include findings and in which at least one reference finding feature amount indicating an image feature for the abnormality of the finding included in each of the reference images and at least one reference normal feature amount indicating an image feature for a reference image in which the finding included in each of the reference images is a normal region are associated with each other have been registered, a similarity between the query image and each of the plurality of reference images on the basis of comparisons between the added finding feature amount and the query normal feature amount, and the reference finding feature amount and the reference normal feature amount;
• and
• a procedure of extracting the reference image that is similar to the query image as a similar image from the image database on the basis of the similarity.