Home Security Camera : What is it?
| Home security cameras monitor certain areas of a home and send still or live feeds to television screens in another area. Also called closed-circuit television (CCTV) cameras, they allow residents to monitor part or all of the house to prevent crime or track down criminals. They are usually hidden, although some cameras are intentionally visible to ward off intruders. A home may have one camera at the hallway, or several cameras installed in different rooms. |
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Kinds of Home Security Cameras include the following: |
Analog television cameras
- These cameras record directly onto video tape recorders, running at about four frames per second to allow a 24-hour video to fit into a three-hour tape.
- Some models have digital compression features that allow them to be saved on digital storage devices, such as hard drives.
- They can also have a video capture card that feeds images directly to computers.
Digital television cameras
- These cameras capture images and transfer them directly to computers for broadcast or later viewing.
- Most models start recording only when motion is detected, since raw, uncompressed videos take up too much hard drive space.
- They have maximum resolutions of 320,000 pixels – much lower than standard video cameras – and have capture rates of 30 frames per second.
Day/night cameras
- Day/night cameras contain an imaging chip that records clear images in all light conditions without using infrared light.
- They are useful for monitoring poorly lit areas, such as basements and attics.
- They can capture low-light images up to 25 feet.
Network security cameras
- Network security cameras connect to remote television sets or broadcast feeds over the Internet.
- They use either Ethernet cabling or wireless Internet for connection.
- They are smaller and easier to hide, but have to be kept within a certain range to broadcast continuously.
Dummy cameras
- Dummy cameras are designed to look like security cameras and are used to discourage intruders.
- They are usually installed near doorways, entrance halls, and other common entryways.
- Some are designed to detect motions and flash LED lights to catch attention.
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Resolution: Choose a home security camera with a good resolution to provide a clearer image of the area. This will also make it easier to identify intruders in case of a break-in. Digital still cameras capture only still images, but they have much higher resolutions than video security cameras, often reaching over four million pixels.
Frame rate: Choose a home security camera with a high frame rate to capture quick actions and avoid blurring. Look for one with a frame rate over 30 fps for maximum accuracy. If you need a lower frame rate because of limited storage, look for a camera with computer connectivity for easier decoding.
Storage: Choose a video camera with a high-capacity storage disk for saving continuous feeds. If you are using it for 24-hour surveillance, look for a model with an expandable memory so that you can increase the storage when needed.
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