Described herein are techniques for initiating an action upon detecting an object within a custom intrusion zone. In embodiments, such techniques may comprise storing first data defining an intrusion zone, the first data indicating, for each of a plurality of boundary points, a respective position relative to the electronic device, receiving radar data generated by one or more radar sensors, detecting, based on the radar data, an object within a radar zone associated with the one or more radar sensors, determining, based on the radar data, an object position represented by an angle of the object relative to and a distance of the object from the electronic device, determining, based on the first data defining the intrusion zone, that the object position is within the intrusion zone, and based at least in part on determining that the object position is within the intrusion zone, initiating an action.

Some embodiments provide a method for separating the motion detection zone(s) of an A/V recording and communication device from the motion alert zone(s) of the A/V recording and communication device. For example, an A/V recording and communication device may be configured to generate motion alerts, and to record audio and video footage, when an event is detected within a selected motion alert zone (e.g., within a defined radius around the A/V recording and communication device). However, the A/V recording and communication device may not generate a motion alert for an event detected outside of the selected motion alert zone, even though the device may still record audio and video footage for the detected event (e.g., when the event is within a selected motion detection zone).

Systems, methods, and software to process tiered motion detection for video surveillance are provided herein. In one implementation, a video processing computing system is configured to identify a request for an object to enter a physical area and select a portion of the physical area available to the object based on the request. The video processing computing system is further configured to monitor movement of the object in the physical area using one or more video streams from one or more cameras and determine that the object moved outside the portion of the physical area available to the object based on the monitored movement. The computing system also generates an alert in response to the determination that the object moved outside the portion of the physical area available to the object.