1. An image discrimination apparatus comprising: a feature extracting means for extracting a feature indicating a feature of an image from an image signal; a distance calculating means for calculating a distance between features from a feature currently extracted by said feature extracting means and a feature extracted last time by said feature extracting means; a threshold calculating means for calculating a statistics value of distances between features which have been calculated by said distance calculating means, and for calculating a threshold for determination of cut points from the statistics value; and a cut point determining means for comparing the distance between features calculated by said distance calculating means with the threshold calculated by said threshold calculating means to determine a cut point from a result of the comparison.