1. A monitoring system comprising: a plurality of imaging devices; and a computing device in communication with a first imaging device and a second imaging device, wherein the computing device is configured to implement one or more services, and wherein the one or more services are configured to: receive a first set of imaging data captured using the first imaging device having a first orientation with respect to an environment at a first time; receive a second set of imaging data captured using the second imaging device having a second orientation with respect to the environment at the first time; receive a third set of imaging data captured using the first imaging device having the first orientation with respect to the environment at a second time; receive a fourth set of imaging data captured using the second imaging device having the second orientation with respect to the environment at the second time; identify a first probability that at least one of the first imaging device or the second imaging device captured the environment in a first state at the first time based at least in part on the first set of imaging data and the second set of imaging data; determine, according to an observation probability function, a second probability that at least one of the first imaging device or the second imaging device captured the environment in a second state at the second time based at least in part on the third set of imaging data and the fourth set of imaging data; and select, according to a transition probability function, an interaction associated with a change from the first state to the second state based at least in part on the first probability and the second probability.