Only 5% of adults over 20 years of age engage in daily physical activity for at least 30 minutes, despite overwhelming evidence showing its many physical and mental health benefits. It is clear that incorporating enough physical activity or exercise in daily life is a challenge for most people. Current efforts use social, economic, psychological and/or...

There is great interest in camera-based wearables for monitoring human activity. These devices can be used to monitor activity anywhere and at any time. Much of human activity involves the use of hands and often in conjunction with objects. Certain everyday activities, e.g., taking medication or grabbing keys, can be quite complex. These activities...