Work identification device

A work identification device comprising:

• a coordinate acquisition unit configured to acquire a plurality of skeleton point coordinates, the skeleton point coordinates being coordinates of a predetermined plurality of skeleton points of a worker;
• a skeleton model generation unit configured to generate a worker skeleton model that is a skeleton model of the worker by converting each of the skeleton point coordinates into relative coordinates with respect to coordinates of a reference skeleton point that is a predetermined skeleton point among the skeleton point coordinates;
• a work identification unit configured to identify work of the worker by using the worker skeleton model and a reference skeleton model;
• and
• a holding detection unit configured to detect that the worker holds an object by hand,
• wherein the skeleton model generation unit is configured to
• obtain corrected reference coordinates by correcting the coordinates of the reference skeleton point according to a ratio of a reference height that is a height of a reference physique serving as a basis of the reference skeleton model to a height of the worker for hand-related skeleton points related to a hand of the worker among the skeleton points to, and
• generate the worker skeleton model by converting coordinates of the hand-related skeleton points into relative coordinates with respect to the corrected reference coordinates, and converting coordinates of other skeleton points excluding the hand-related skeleton points into relative coordinates with respect to the coordinates of the reference skeleton point
• when a detection is made that the worker holds the object by hand.