1. A computer-implemented method for detecting a gesture performed by a user in connection with a user interface comprising a plurality of sensor blobs, the method being performed in a computerized system comprising a central processing unit, a camera and a memory, the computer-implemented method comprising: a. acquiring a plurality of images of the plurality of sensor blobs using the camera; b. using the central processing unit to identify occlusion of at least some of the plurality of sensor blobs by the user in the acquired plurality of images of the plurality of sensor blobs; and c. using the central processing unit to detect the gesture performed by the user based on the identified occlusion of at least some of the plurality of sensor blobs in the acquired plurality of images.