Techniques are described for controlling communication devices using image analysis. For instance, when a communication is received by a communication device, the communication device outputs an alert to notify users of the received communication and accesses one or more images of an area proximate to the communication device. The one or more images cover an area proximate to the communication device at a time during which the communication device is outputting the alert. The communication device analyzes the one or more images to determine whether a user is present in the one or more images and in a position to perceive the received communication. The communication device handles at least one aspect of the received communication based on the determination of whether a user is in a position to perceive the received communication.