Image Processing Reference
In-Depth Information
Computer video screens come in a variety of different sizes. A 15-inch diagonal
screen is quite commonplace, and it is unusual to find CRT monitors smaller than this.
LCD displays on laptops are usually smaller.
One of the benefits of this standardization is that monitor cables or the monitors
themselves now have sensing pins. The picture information transmitted from the com-
puter to the display does not require all the pins that are available in the connector.
Connecting specific pins together creates a unique “'binary'” value. That value tells the
graphics adapter card what resolutions the monitor is capable of supporting.
Many users have much larger monitors—17, 19, 21, and 23 inches are common these
days. The larger sizes are available as computer-compatible LCD screens. Desktop screens
are available that have a 30-inch diagonal and very high display resolutions. Plasma
screens are manufactured with up to a 60-inch diagonal. Some large-format rear-projection
displays are based on the Texas Instruments DLP chip that is also used in multimedia pro-
jectors.
The highest-performance screen that is widely available is the Viewsonic VP2290b.
Laboratory prototypes of digital video cameras that operate at the maximum 8 megapixel
resolution were demonstrated at the IBC by Olympus. These SH880 movie cameras will
become more popular as HDTV penetrates the TV industry.
Experimental prototypes with up to 4,000 lines are being demonstrated in the NHK
laboratories. This will show an incredible amount of detail but is unlikely to be in your liv-
ing room in the foreseeable future. The display exceeds the amount of picture information
presented in an IMAX frame.
QUXGA-W (3840 x 2400)
Apple 30 inch (2560 x 1600)
QXGA (2048 x 1365)
UXGA-W
(1920
x 1200)
UXGA (1600 x 1200)
SXGA (1280 x 1024)
XGA (1024 x 768)
SVGA (800 x 600)
VGA (640 x 480)
Figure 6-1 Relative screen sizes.
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