PROBLEM TO BE SOLVED: To provide a gait analyzer capable of reducing an affection of a person who is made a background and a background which is made a person, and capable of accurately analyzing gait of a person.
SOLUTION: There is provided a gait analyzer for analyzing a gait of a person. The gait analyzer comprises: a GEI generation part; a derivation image generation part; a movement amount calculation part; and a feature amount calculation part. The GEI generation part overlaps plural first frames included in a first moving image in which a gait is captured, so that areas corresponding to a person are overlapped, for generating a first GEI (gait energy image). The derivation image generation part generates a first derivation image in which the first GEI is derived. The movement amount calculation part performs matching of contours of the first derivation image and an area corresponding to the person on each first frame, and calculates a first movement amount which is a movement amount of each first frame to the first derivation image by the matching. The feature amount calculation part calculates a first feature amount which is a feature amount of the gait based on the first movement amount.
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