114
Photo
BMP
: The
standard
bit-mapped graphics
format
used in the
Windows
environment
. By convention,
graphics
files
in the BMP format end with a .BMP
extension
.
GIF
: Pronounced jiff or giff and stands for
g
raphics
i
nterchange
f
ormat, it is a
bit-mapped graphics
file format
. GIF
supports
color and various
resolutions
. It
uses
data compression
, but it is limited to a 256-color palette.
JPG
: Short for
J
oint
P
hotographic
E
xperts
G
roup, and pronounced jay-peg.
JPEG is a
lossy compression
technique for color images. Although it can reduce
files sizes to about 5% of their normal size, some detail is lost in the compression.
JP2
: JP2 is the file extension for the new image format called JPEG2000 based
on the latest image compression technology.
PNG
: Short for
P
ortable
N
etwork
G
raphics, is a
bit-mapped graphics format
similar to
GIF
. In fact, PNG was approved as a standard by the World Wide
Web consortium to replace GIF because GIF uses a patented
data compression
scheme. In contrast, PNG is patent and license-free.
TIFF
: Acronym for
T
agged
I
mage
F
ile
F
ormat, and is one of the most widely
supported
file formats
for
storing
bit-mapped
images on
personal computers
.
TIFF
graphics
can be any
resolution
, and they can be black and white,
gray-
scaled
, or color. Files in TIFF format often end with a .tif extension.
Glossary (continued)
