Continual Egocentric Object Recognition

We present a framework capable of tackilng the problem of continual object recognition in a setting which resembles that under which humans see and learn. This setting has a set of unique characteristics: it assumes an egocentric point-of-view bound to the needs of a single person, which implies a relatively low diversity of data and a cold start with no data; it requires to operate in an open world, where new objects can be encountered at any time; supervision is scarce and has to be solicited to the user, and completely unsupervised recognition of new objects should be possible. Note that this setting differs from the one addressed in the open world recognition literature, where supervised feedback is always requested to be able to incorporate new objects. We propose a first solution to this problem in the form of a memory-based incremental framework that is capable of storing information of each and any object it encounters, while using the supervision of the user to learn to discriminate between known and unknown objects. Our approach is based on four main features: the use of time and space persistence (i.e., the appearance of objects changes relatively slowly), the use of similarity as the main driving principle for object recognition and novelty detection, the progressive introduction of new objects in a developmental fashion and the selective elicitation of user feedback in an online active learning fashion. Experimental results show the feasibility of open world, generic object recognition, the ability to recognize, memorize and re-identify new objects even in complete absence of user supervision, and the utility of persistence and incrementality in boosting performance.