IMAGE-PROCESSING METHOD, IMAGE-PROCESSING DEVICE, AND RECORDING MEDIUM

An image-processing method includes a measurement step, an index calculation step, a comparison step, and a selection step. A processor measures a distance at each of two or more points in one or more images of a subject in the measurement step. The processor calculates a first index or a second index on the basis of the distance in the index calculation step. The processor compares the first index or the second index with a threshold value in the comparison step. The processor selects at least one image included in the one or more images in the selection step when the first index is greater than the threshold value or the second index is less than the threshold value.