Difference between pages "Portable Network Graphics (PNG)" and "User:Mwhitese"

From ForensicsWiki
(Difference between pages)
Jump to: navigation, search
(See Also)
 
m (Creating user page with biography of new user.)
 
Line 1: Line 1:
'''Portable Network Graphics''' (aka PNG) is an image file format developed to replace GIF images on the web.  It uses lossless compression and is thus not ideal for photographs. The types of images ideally suited for PNG are line-art, text, other graphics that have sharp transitions.
+
Currently working for Stanley Black & Decker as an IT security technologist.
 
+
=Format=
+
A PNG file comprises "chunks" of data, some of which are mandatory and others of which are ancillary. Some ancillary chunks can contain metadata text or timestamps, but does not contain nearly as much metadata as [[exif]] images.
+
 
+
PNG files begin with the following 8-byte (hexadecimal) signature:
+
<pre>
+
89 50 4E 47 0D 0A 1A 0A
+
</pre>
+
 
+
=See Also=
+
* [[:Tools:Document_Metadata_Extraction#Images|Tools for extracting image metadata]]
+
 
+
=External Links=
+
* [http://en.wikipedia.org/wiki/Portable_Network_Graphics Wikipedia article]
+
* [http://www.w3.org/TR/2003/REC-PNG-20031110/ W3C Recommendation]
+
 
+
 
+
 
+
[[Category:File Formats]]
+

Latest revision as of 09:24, 10 April 2010

Currently working for Stanley Black & Decker as an IT security technologist.