A Cardiopulmonary resuscitation assistance device is used by a Rescuer when administering Cardiopulmonary resuscitation to a patient. Using the rescuer vital signs, image subsection from a patient facing camera can be identified that comprise the rescuer's hands. Having correctly identified the image subsections comprising the rescuer's hands the chest compression depth and frequency can be derived from the patient facing camera by tracking the distance between the patient facing camera and the rescuer's hands.