Security Systems

1- Access Control

Biometrics refers to authentication techniques that rely on measurable physical characteristics that can be automatically checked.

There are several types of biometric identification schemes:

• face: the analysis of facial characteristics
• fingerprint: the analysis of an individual's unique fingerprints
• hand geometry: the analysis of the shape of the hand and the length of the fingers

In a biometric security system, the process of comparing a biometric data sample against the system’s entire database reference templates in order to establish the identity of the person trying to gain access to the system.

The process of granting or denying access to a network resource. authorization, allows the user access to various resources based on the user's identity.

2- Surveillance cameras

CCTV: (Closed-circuit television)It is a TV system in which signals are not publicly distributed but are monitored, primarily for surveillance and security purposes.
The definition of CCTV refers to closed-circuit television, or the use of video cameras to transmit images to a specific limited number of televisions on the same network or circuit.

IP camera• Used with NVR
• Assign to it private or public IP address
• Some cameras have external memory card that we can record on it
• Some cameras has built in microphone and speaker and/ or we can attach external microphone and speaker to it

3- DVR

(Digital Video Recorder):A security system device that records the video from up to 32 surveillance cameras on a hard disk. The frame rate can be switched from real time to time lapse in order to save disk space.

Digital video recorders now allow you to access your camera footage remotely over the internet. By connecting your analog cameras to a DVR, you can monitor video feeds in real time from any computer with internet access, and even from compatible cell phones or handheld PDAs.

3- NVR

(Network Video Recording):A security system device that view and records the video up to 32 cameras on a hard disk, USB flash drive or other mass storage device (by connecting it to the network).

Note

in a comparison which to use NVR or DVR, it depends on the overall cost to serve the same quality so it depend on the existing resources (cables….) and also depend on the number and quality of the needed cameras.