An operation-correctness determining apparatus capable of determining whether a predetermined operation has been performed correctly includes a wearable camera, a target object detector, a hand skeleton detector, a motion detector, and an operation-correctness determiner. The wearable camera captures a region larger than or substantially equal to an operator's field of view. The target object detector detects a target object within a captured region captured by the wearable camera. The hand skeleton detector detects an operator's hand skeleton within the captured region. The motion detector detects an operator's hand behavior from time series variation of the detected target object and from time series variation of the detected operator's hand skeleton. The operation-correctness determiner determines whether at least the detected target object and the detected operator's hand behavior substantially match a pre-learned target object and a pre-learned operator's hand behavior, and if so, determines that the predetermined operation has been performed correctly.
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