Digital Photography: A to Z (Part 20)

 U 

UART
UART:
Universal Asynchronous Receiver Transmitter. Set of chips in a computer regulating data flow over the serial interface.

Unsharp Maskiing
Unsharp Masking:
Often abbreviated USM. Describes an image focusing process. The quality of the result depends on the characteristics of the algorithm used.


Update
Update:
An updated version of a software program.



Upgrade
Upgrade:
A new improved version of hardware of software that is already available.



url
URL:
Unified Resources Locator. Address system for internet sites.



USB:
The Universal Serial Bus is probably going to replace the series and parallel interface. USB enables the effortless connection of peripheral devices without the need to install cards into the computer or reconfigure parts of the operating system. The most important advantages are: the support to Plug and Play. hot plugging, automatic configuration of external devices upon connection (no re-start necessary), faster data transfer (up to 12 Mbps), and the possible operation of up to 127 devices from a single port.



Utility
Utility:
A program that performs special task for the operating system, for example: file administration, controlling a digital camera, a CD-ROM drive or printer.



UXGA:
Ultra Extended Graphics Array. This refers to images with a resolution of 1600 x 1280 pixels. (See also SVGA, SXGA. VGA, XGA)


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