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Digital Terminology
IEEE 1394
A high speed serial transmission system/protocol that connects a computer
with a peripheral device such as an MO drive or digital camera. High speed
data transmission is performed through a connection cable.
JPEG
Abbreviation for “Joint Photographic Experts Group”.
A compression system for still image data, the JPEG file format takes the
name of a professional organization established by ISO.
During compression, the operator may choose between a compression
method that entails slight loss of image quality (irreversible compression), or
a method with no loss of quality (reversible compression), and in the case of
the image quality loss compression, the degree of quality loss can be speci-
fied.
LCD
Abbreviation for “Liquid Crystal Display”. A display device that uses liquid
crystal.
LCD is thinner and lighter than other display devices, and consumes com-
paratively less power. It is often used in digital equipment.
Mired
This value is one million times the reciprocal number of the color tempera-
ture.
Even where the difference in color temperature is the same, where the color
temperatures are low the color change in the color temperature is large, and
where the color temperatures are high, the color change in the color tem-
peratures is small.
For example, for a color temperature difference of 100K, in the 6000K range
the color will hardly change at all, while in the 3000K range the color change
will be large.
Mired is a standard for expressing the variation widths that are substantially
the same. Mired is also used as a unit for color temperature correction filters.
Noise
Conventionally, noise was unnecessary in an image and caused the image
to deteriorate.
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