Lost child detectors, lost child detection methods, and programs

摘要

PROBLEM TO BE SOLVED: To suppress a processing load when detecting a lost child from an input image composed of a plurality of frame images. SOLUTION: A lost child detection device 12 has a first motion vector detection unit 50 that detects a motion vector with respect to an input image to detect a human region, and a feature point extraction unit that extracts feature points in the human region. 52, a size detection unit 54 that detects the size of a person reflected in an input image from the distribution of feature points, a second motion vector detection unit 56 that detects a motion vector at a feature point, and a feature point. The feature point tracking unit 58 that obtains the locus of the feature point from the motion vector in the above, the behavior detection unit 60 that detects the characteristic behavior of the lost child based on the locus of the feature point, the size detection unit 54, and the behavior detection. A lost child determination unit 62 for determining a lost child from the detection result of the unit 60 is provided. The first motion vector detection unit 50 detects a motion vector for a certain frame image, and the second motion vector detection unit 56 detects a motion vector over a plurality of subsequent frame images. [Selection diagram] Fig. 2