the idea of using a wearable camera to gather visual data from a first-person perspective dates back to the 70s, when steve mann invented "eye glass", a device that, when worn, causes the human eye itself to effectively become both an electronic camera and a television display. but it was only after the introduction to the market of the microsoft sensecam in 2006 that wearable cameras were used for the first time in large scale experimental health research works. the interest of the computer vision community into the egocentric paradigm has been arising slowly entering the 2010s and it is rapidly growing in recent years, boosted by both the impressive advanced in the field of wearable technology and by the increasingly number of potential applications.