Systems and methods are directed toward occupancy detection in a predefined space including one or more sub-zones. Occupancy of the predefined space can be determined by determining the occupancy of an outer zone comprising the predefined space, and determining the occupancy of individual sub-zones to the outer zone. Occupancy values of the individual sub-zones can be rescaled such that the sum of the individual sub-zones occupancies sum to the already determined outer zone occupancy. The occupancy of the predefined space then may be determined using the rescaled occupancies of the various sub-zones included in the predefined space. Such processes can be repeated for individual sub-zones, which may be treated as a separate outer zone including one or more sub-zones.
