Doorbell, security system including doorbell apparatus, and method of operating the same

An apparatus comprising:

• a camera to acquire a first image of an object entering a first region at a first distance from the camera at a first time and a second image of the object entering a second region at a second distance from the camera at a second time, the second region being disposed closer to the camera than the first region such that the object is closer to the camera at the second time than at the first time;
• an image processor having a first image processor to detect without identifying the object in the first image by applying an object detection algorithm and a second image processor to identify the same object in the second image that was detected in the first image by applying an object identification algorithm different from the object detection algorithm;
• a storage device to store the second image corresponding to the identified object;
• and
• an alarm to activate an alarm signal depending on whether the identified object corresponds to a predetermined object.

A method of operating a security system, the method comprising the steps of:

• capturing a first image of an object entering a first region at a first distance from a camera at a first time;
• detecting without identifying the object in the first image by applying an object detection algorithm;
• capturing a second image of the object entering a second region at a second distance from the camera at a second time, the second region being disposed closer to the camera than the first region such that the object is closer to the camera at the second time than at the first time;
• identifying the same object from the second image that was detected in the first image by applying an object identification algorithm different from the object detection algorithm;
• storing the second image corresponding to the identified object;
• and
• transmitting information corresponding the identified object to a user terminal.