Crowd counting

Embodiments of the present invention describe receiving, by a first device, an information vector over a short-range communication network established between the first device and a second device. Additionally, embodiments comprise determining the first identifier does not match the second identifier, merging one or more smart maps from the two or more computing devices together, comparing a first set of devices represented in the first set of participants and a second set of devices represented in the second set of participants, identifying pairs of matching devices in the first set of devices and the second set of devices, generating a set of unique devices by discarding one device for each pair of matching devices identified, and outputting a smart map comprising a count of participants equal to the sum of participants associated with the set of unique devices.