Differences between version 3 and predecessor to the previous major change of JPEG.
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| Newer page: | version 3 | Last edited on Wednesday, September 15, 2004 3:06:51 pm | by AristotlePagaltzis | Revert |
| Older page: | version 1 | Last edited on Wednesday, September 1, 2004 11:44:56 pm | by StuartYeates | Revert |
@@ -1,7 +1,12 @@
-Acronym for __J__oint __P__icture
__E__experts
__G__roup.
+[
Acronym]
for __J__oint __P__hotographic
__E__xperts
__G__roup.
-An
image file format
well suited for natural images. The "Joint" in the title refers
to the fact that the standard
is a joint effort between
[ISO
] and [ITU
-T
].
+A set of
image FileFormat~s
well suited for natural images. Standard [JPEG] uses lossy compression (Discrete Cosine Transform and quantisation)
to significantly reduce file size while maintaining an acceptable image quality. JBIG
is a specialization of
[JPEG
] for bi-level images (ie black
and white). JPEG2000 is a newer, better format using wavelet compression
-- which is [Patent
] encumbered, so you're unlikely to see it implemented in OpenSource software
.
-Often uses the
[FileExtension
]s
.jpg or .jpeg.
+[JPEG
] image files commonly have the FileExtension <tt>
.jpg</tt>
or <tt>
.jpeg</tt>, but rarely <tt>.jpe</tt> also occurs
.
-Compare
[GIF
], [PNG]
+The "Joint" in the name refers to the fact that the standard is a joint effort between
[ISO
] and [ITU-T]. Like many [ISO] standards
, you have to pay to get a copy of it.
+
+See also:
+* [The JPEG Homepage | http://www.jpeg.org/]
+* [GIF]
+*
[PNG]
