IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD AND IMAGE PROCESSING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an image processing device capable of extracting the feature point of a maker with high accuracy.SOLUTION: The image processing device includes an acquisition part for acquiring an image including a marker having a plurality of first color regions and a plurality of second color regions different from the first color regions, the plurality of first color regions and the plurality of second color regions individually facing each other. The image processing device further includes: an extraction part for extracting the first color regions or second color regions from the image; a diminishing part for diminishing the first color regions or second color regions until first similarity between the shape of the extracted first color regions or second color regions and the shape of a prescribed ellipse satisfies a first threshold; and a calculation part for calculating second similarity between the first color regions or second color regions having satisfied the first threshold and a prescribed butterfly shape.