1. A method of detecting local features of video comprising the steps of: extracting a first static image and a second static image from a video made up of a plurality of static images; calculating a feature quantity of the first static image and a feature quantity of the second static image; detecting the second static image having a feature quantity such that a difference in feature quantity between the first static image and the second static image satisfies a predetermined condition; and displaying the detected second static image and the feature quantity difference in one-to-one correspondence.