1. A patient monitoring system for monitoring a patient area, the system comprising: a sensor configured to output a plurality of frames, the plurality of frames containing three dimensional information of the patient area; a user interface; and control circuitry configured to: receive the three dimensional information of the plurality of frames; identify a location of a patient support surface based on the three dimensional information; set at least one threshold, each of the at least one threshold comprising a two dimensional plane, each of the at least one threshold set at a respective location based on the location of the patient support surface; identify one or more patient locations based on the three dimensional information; compare the one or more patient locations to the at least one threshold; and generate an output with the user interface based on the one or more patient locations traversing the at least one threshold.