Webcams

Webcams are small cameras that sit on your PC and send images in real time. Those images can be accessed using the World Wide Web, instant messaging or a video calling application. Usually, the webcam transmits the images to a web server, either continuously or at regular periods, helping you to send video e-mail messages, to make photos that you can edit and send them later.

Most of the webcams have a low cost and they connect to the USB port of the computer using a cable of variable length.
If we choose our mouse or keyboard for their pretty obvious appearance and functionality, when it comes to webcams, everybody is in a dilemma. Everything depends on how you use the webcam in question.

When you want to purchase a webcam, you should keep in mind the two most important criteria: the number of frames per second and the resolution.
Regarding the number of frames per second, the higher the number is, the better that webcam will be. Most webcams have between 20 and 30 frames per second.
As for the resolution, if you use your webcam just to send photos, you don't need a very high resolution. New models are capable of capturing video at a resolution of 640x480, which is what passes for a decent quality. Resolution is the most important quality factor for a webcam.

Some webcams can be used as digital cameras, due to their incorporated memory. Yet you still have to keep in mind that these webcams don't take pictures as their main function and therefore the quality of the digital pictures obtained is not as good as the quality you can get when using a digital camera.
For those using their webcam for video conferencing, audio plays a very important role and the embedded or external microphone must play the sounds with a good accuracy.

When you choose a webcam you should also know what the light conditions for the webcam are. If you have an office located in a corner of the room and the light comes from behind the webcam, then you can buy a less expensive webcam. With a light coming from a 40W light bulb, everything will be seen as acceptable. If you don't want to have problems, and you want to use your webcam in any lighting conditions, it is best to choose the webcam in an informed manner. That does not necessary mean you have to buy an expensive and super quality camera. But don't choose the cheapest either, there is a saying ? "what you give is what you get".

Unfortunately, a good quality webcam is not enough to transmit live over the Internet, what happens around your computer. You should keep in mind that a quality video transmission is a huge flow of data and, on the Internet, these continuous data streams are divided into packets that are sent to the recipient. If there is a bad connection to the Internet, either at the transmitter or at the recipient, then instead of a real-time video we will receive only a succession of pictures. It is recommended to use a cable connection, a fiber-optic or an ISDN connection.

Webcam is a video capture device that is connected to a computer or computer network, connected by USB ports or, if connected to a network wireless connection is used, ethernet or Wi-Fi. The most popular use is for videotelephony or connecting people from one place to another, permitting a computer to act as a videophone that is almost the same as telephone or video conferencing station for bigger coverage. This can be used in messenger programs such as camfrog, Windows Live Messenger, Skype and Yahoo! messenger services. Other popular uses of this device, which include the recording of video files or even capturing still-images, are accessible via different software programs, applications and other devices. Webcams are known for low manufacturing costs and can be flexible, making them the lowest cost of two way communication.

The term 'webcam' is a video camera that is connected to the Web continuously for no limit of time, rather than for a specific or particular session, generally supplying giving a view for anyone who visits its web page over the Internet. Some of these are, for example those used as online traffic cameras or CCTV cameras on the road, are expensive, and too much to buy, such professional video cameras. First employed and used in 1991, a webcam was pointed and placed at the Trojan room coffee pot located at the computer science department of Cambridge University. The camera was switched off on August 22, 2001. The last image captured by the camera can still be viewed at its homepage/website. The first and oldest webcam still operating is called FogCam and it is at San Francisco State University, which has been running continuously up to now since 1994.

One of the most widely known and reported-on webcam sites was JenniCam, started in 1996, which allowed people who use the internet to constantly observe the life of its namesake, somewhat like reality TV or you may say Big Brother is watching, it was launched three years later. Now a day, the website Justin.tv has shown non-stop video and audio stream from a mobile camera mounted or attached on the head of the site's star. Other cameras are placed at bridges, public squares and other known public places, their output video made available on a public Web page in resembling with the original concept of a "webcam".

Around the turn of the century and the age of computer, computer hardware manufacturers began building webcams directly or built-in into laptop and desktop screens or monitors, thus eliminating the need to use an USB port device or Firewire camera. Gradually webcams came to be used more for meeting and communication between two people, or among a few people, than for offering a view on a Web page for an unknown public and making meeting people easy and convenient. The creation of webcams becomes the greatest thing that helps other nation to communicate. This also help people on government to monitor their people, became a monitoring system for most of governing leaders.