Motion detection device, motion detection system, program, and motion detection method

Abstract

An action detection device (130) comprises: a hand surrounding area image acquisition unit (133) which acquires a first target image that indicates a detection target in a first time and a second target image that indicates the detection target in a second time; an encoding processing unit (137) which extracts a first feature amount and a second feature amount respectively from the first target image and the second target image using an encoder trained by performing training processing involving training an autoencoder including the encoder that encodes one target image included in a plurality of target images, thereby extracting a feature amount and a decoder that decodes the feature amount and that outputs a decoded image, and training processing involving training the encoder such that the total amount of change in a plurality of feature amounts extracted from a plurality of target images becomes smaller; and a component operation detection processing unit (141) which, when the difference between the first feature amount and the second feature amount exceeds a predetermined threshold value, and the detection target is in a predetermined region, detects that a predetermined action is being performed.

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