Patent ID: 8542878
Filing Date: 2013-09-24
Classification: G06K,G06T

Abstract:
1. Method of controlling a function of a device, including: obtaining a sequence ( selecting at least one measurement zone ( for at least one measurement zone ( obtaining a signal ( determining at least one characteristic of the signal ( (i) determining whether the signal ( 30 ; 41 ; 55 ) has a spectrum with a local maximum at a frequency matching a comparison frequency to a certain accuracy; and (ii) determining whether at least a certain frequency component of the signal ( 30 ; 41 ; 55 ) is in phase with a comparison signal to a certain accuracy; and controlling the function in dependence on whether the determination is positive, wherein the method is unobtrusive to a living being present in a field of view of the camera, and wherein the living being can be in motion.