How to Choose the Right Web Cam
When looking for a web cam or digital camera in order to produce a good quality video product, you will need one that is USB based or has firewire capabilities (preferred). That is, one which can be connected to your desktop or notebook computer. Then you have the ability to run different software applications that you wish to use, for example, video conferencing, and surveillance monitoring or even just for your own entertainment.
When looking for a good web cam, you may want to take a closer look at those produced by Creative Web Cam or Logitech Quick Cam. These companies offer a variety of different types of cameras, all of which are readily available. They offer low resolution instant messaging ones through higher resolution devices. They start at around $30 and can go up to as much as $150 for those with a pan and tilt control.
However, there are some things which you should consider before you purchase your web cam.
Basic Design
These web cams are specifically designed for use with your desktop or notebook computer. They can either sit on the table or rest on a monitor. There are even some which can clamp on to your portable notebook screen, while others offer an adjustable base so that they can be used with both kinds of cameras.
Image and Resolution
The more simple types of web cam have a resolution of 352 x 288. This is good enough for basic video conferencing. Also, most web cams offer the user basic live video and still image capture at up to VGA resolution of 640 x 480 pixels. But there are some which use 1.3 megapixel image sensors, which offers higher quality and sharpness (this is extremely useful for still image grabs). There are also others which are “software enhanced” in order to provide you with the highest resolution possible. However, most web cams offer full rate video capture at 30 frames per second. So this should be no problem for many computers today which come with a USB 2.0 interface. While there are others which offer you better sensitivity in low light and these are particularly good for video conferencing when sitting in a dark room or for use as a surveillance tool in the evening.
Lens and Focus
There are some web cams which come with fixed focus, while others will offer the user a manual focus ring. These are particularly good for focusing on a person’s face, for video conferencing or to focus on something in the distance. There are others which can offer the user a wider angle lens (around about 76o). This is great if you want to get a large group of people in to the frame or you want to see the full vista of the scenery outside your window.
Audio Capture
There are some web cams which come with a built in microphone (so you will need no other equipment).
USB Interface
In order to produce higher quality video, you will need to purchase a camera which supports the faster USB 2.0 high speed interface. Most web cams and digital cameras today will also support the much slower USB 1.1 interface, but the resolution provided by this is much lower.
Normally the more expensive types of web cam which cost around $130 come with a motorized pan and tilt.
Unfortunately consumer web cams do not have an optical zoom lens, but they do offer digital zoom (up to 4x) in order for you to enlarge an area of the captured frames. This is especially useful for remote viewing. Say, for example, when the video being transmitted over the internet is actually of a lower resolution than the captured video frames.
You will often find that most web cams will include a Windows driver that supports the standard Windows video interface. These are compatible with most Windows applications.
But apart from the driver software, these cameras will also be provided with other software bundles. They may well include video monitoring and capture, video instant messaging, video e-mail, video editing, video conferencing and video surveillance.
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