While video intercom are a good solution for the surveillance of access, they also have some limitations. One of them is the size of the screen of the monitor, usually very small. So, when looking for images of the highest quality, the most practical solution is install one or more Chambers, with the additional advantage that they not only allow the control of areas of access but also that of anywhere else in a property.
Before starting the first which must determine is the area that you want to monitor. Once defined the area, examine the distance required to reach viewing area in a clear way. The distance between the camera and the target area will vary depending on the camera model. It is install it in a place of difficult access, to prevent strangers handle it or they can interrupt their visibility (see www.securitypology.com). According to their own needs, decide also if that Chamber pass unnoticed or is clearly visible. If it is wavering between leave inside or to the outside, remember that, although there are cameras specially designed to withstand tough tests, as extreme or ambient temperatures, there is also the possibility of protecting your normal camera housing, to avoid impacts and protect it from the weather.
1. Which choose
* Currently we can find different types of cameras, from the simplest to the most complex, each designed to perform a function specific or targeting a particular quotation.
-There are mini, hidden camera, day/night cameras, domes, Minidomos, IP cameras and CCTV cameras.
2. What color or black and white?
* In general, the color images are sharper that the in black and white but, in certain lighting conditions, especially when it is scarce, cameras color may not work properly.
Color models more downside is that they require one greater investment, but the delivered image quality justify the possible differences.
3. Low light
* To obtain clear images , it is necessary that the light of the environment or the camera is stable and reliable.
A camera lux level indicates its ability to capture images in the dark. The lower the lux level, less light needs to capture a sharp image.
* There are cameras with infrared sensor for use inside and outside, allowing a good night vision, but it’s more expensive cameras
* Infrared is used in night vision equipment when the amount of visible light is insufficient to see with the naked eye objects.
* These cameras capture the radiation they emit objects and then reflect it on a screen. Therefore, the hottest objects become also the brightest.
See also: www.deluxesurveillance.com
4. Define needs
* Some cameras are made only to observe, for example: monitor what the children in the garden, do see who is knocking at the door, etc.
* There are others that have systems of audio and video color, which allow not only to see the image on a conventional TV, but – in addition – to record those images in his video recorder or even on your PC.
* Recording can be programmed to be carried out every certain interval of time, eliminating the need to have the device all the time running.
* Most modern cameras have a motion sensor that activates the image print function when it senses that something is moving.
5. Wired or wireless
* There are cameras that work with current and others use batteries.
* Wireless cameras have the advantage – above the cable – which can be placed in a place and then another, with ease.
* On the other hand, the cable they are fixed in a location and you must be careful that the cable will not disturb
However, cameras that work with cable, tend to provide better quality images and there is no risk of that signal is interfered by other wireless devices, such as phones, intercoms or computer networks.
* IP cameras are the ideal solution for places where there is an internal network of computers and do not want or can not install wiring for the cameras. They have incorporated a web server, which makes that they can be directly connected to the Internet. Using the right software is assigned an IP address internally and, as simple as typing this IP address from any computer connected to the Internet, to see – from anywhere in the world – what is happening in the place where the camera is installed.
* Some models are capable of detecting movement, even some that have the function of activating alarms, either your phone or e-mail, if they detect movement.
* Dome Cameras belong to the new generation of high-sensitivity cameras. They are usually placed at the level of sky or abroad. They have a powerful optical zoom, with “Pan” (horizontal) and “Till” (vertical) movement and 360 ° of rotation, what wide your field of vision in relation to other cameras. The high speed domes are ideal for controlling large areas (factories, parking lots, supermarkets, etc.). With its great zoom and its high speed of movement let you delivered a quick response. From a checkpoint can monitor images captured by a large number of domes
* Ocultas cameras allow you to leave them hidden inside various objects, such as toys, alarm sensors, smoke detectors, pencils, screws and even buttons on shirts.
* Some systems support only 1 or 2 cameras connection, while others can be extended.
Cameras most works through a system of local network, which allows you to have more than one camera working in various strategic areas of a House, and a monitor, from which to monitor what is happening
* Central cameras DVR server is, in reality, a computer dedicated to the collection and handling of the information captured by the cameras. There are systems ranging from servers to 4 cameras, with 15 frames per second of capture (approximately 4 frames per second for each camera), up to sophisticated servers for 16 cameras, with 400 frames per second capture of images (25 frames per seconds for each camera according to www.a2zcamerablog.com).
8. Closed circuit television (CCDT)
* Closed television circuits allow to visually control everything that happens to the interior of a given area to control. Some allow you perform and store recordings with digital quality.
They can be very useful to monitor babies or sick people.
* Consist of one or more cameras and a monitor or TV, where these are connected to view the captured images .
* They have 2 to 12 tickets for cameras. Some have a sequencer (exchanges between cameras automatically) or with a quad (divided the screen into 4 pictures more guys to display images from 4 cameras simultaneously).
* There are systems that allow a double communication: from the camera to the monitor and from the monitor to the camera. So, on the monitor you can see and hear what is happening on camera, as you can also talk to the cameras.