Detecting unauthorized visitors

A computerized method for detecting unauthorized visitors, the method implemented by one or more processors and comprising:

• receiving, from one or more 3D motion sensors, an image of a visitor within an area to be monitored;
• receive a plurality of registered reference points on faces of registered visitors from a remote database;
• assigning a plurality of reference points on the face of the visitor in the image from the one or more 3D motion sensors;
• determining whether the visitor is an unauthorized visitor by comparing positions, distances between, sizes, or shapes of the reference points to positions, distances between, sizes, or shapes of the reference points of the plurality of registered reference points on faces of registered visitors;
• and
• initiating an alert being sent to one or more designated recipients.

Non-transitory computer-readable storage media having embodied thereon instructions that, when executed by one or more computer processors, cause the one or more computer processors to:

• receive, from one or more 3D motion sensors, images of a visitor within an area having an individual to be monitored;
• assign a plurality of reference points on the face of the visitor in one or more images received from the one or more 3D motion sensors;
• receive a plurality of registered reference points on faces of registered visitors from a remote database;
• determine whether the visitor is an unauthorized visitor by comparing positions, distances between, sizes, or shapes of the reference points to positions, distances between, sizes, or shapes of the reference points of the plurality of registered reference points on faces of registered visitors;
• and
• initiate an alert being sent to one or more designated recipients.