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CMOS stands for Complementary
Metal-Oxide Semiconductor. CMOS chips are substantially
less expensive and problematic to fabricate, and they have significantly lower
power requirements than CCDs. Also, CCDs have the single function of registering
where light falls on each of the hundreds of thousands of sampling points. CMOS
can be loaded with a host of other tasks, such as analogue-to-digital
conversion, load signal processing, handling white balance and camera controls,
and more. It's also possible to increase CMOS density and bit depth without
bumping up the cost.
Frames Per Second
is a measurement of how much information is used to store and display motion video.
The term applies equally to film video and digital video. Each frame is a still
image; displaying frames in quick succession creates the illusion of motion. The
more frames per second (fps), the smoother the motion appears. Television in the
U.S., for example, is based on the NTSC format, which displays 30 interlaced
frames per second (60 fields per second). In general, the minimum fps
needed to avoid jerky motion is about 30. Some computer video formats, such as
AVI, provide only 15 frames per second.
Universal Serial
Bus is a new external bus
standard that supports data transfer rates of 12 Mbps. A single
USB port can be used to connect up to 127 peripheral devices,
such as mice, modems, and keyboards. USB also supports Plug-
and-Play installation and hot plugging. With USB, you can add and
remove devices to a computer while the computer is running and have
the operating system automatically recognize the change. You can
plug in a device and play with it, without worrying about setting
DIP switches, jumpers, and other configuration
elements.
The resolution
signifies the number of dots (pixels) on the entire screen. For example, a
640-by-480 pixel screen is capable of displaying 640 distinct dots on each of
480 lines, or about 300,000 pixels. This translates into different dpi
measurements depending on the size of the screen. For example, a 15-inch VGA
monitor (640x480) displays about 50 dots per inch.
Printers, monitors, scanners, and other I/O devices are often classified as high
resolution, medium resolution, or low resolution. The actual
resolution ranges for each of these grades is constantly shifting as the
technology improves.
It is the range that the PC
Cameras can capture and focus.
The lens that PC Cameras use
for capturing the image.
This feature allows the
user to capture the still image right from the PC camera. It is like having an
extra camera function to the video camera.
The PC Cameras automatically
change the white
balance for the image. Hence, the image will not be too dark or pale.
The product is ready to be
used for the Internet.
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