|
GIF (Graphics Interchange Format) is a
useful 8-bit-per-pixel bitmap image format created by
CompuServe in 1987. Since then it has become wide used for
its wide support and portability. GIF supports online
drawings, pictures with blocks of solid colors, and pictures
with sharp boundaries between colors. GIF is unsuitable for
photographs due to its 256 distinct colors from the over 16
million representable in 24-bit RGB limitation. However,
there is a hack that can overcome this limitation under
certain circumstances. On the process of compressing, there
is no information lost in GIF files.
WMF (Windows Metafile) is a 16- bit
graphic format appearing on MS Windows systems. It became
commonly used since the wide use of graphics formats, like
GIF and JPEG. Windows graphic layers GDI can execute the WMF
format to store image. It contains the functions of
compressing files, editing images and so on. Generally, a
whole image is stored as a sequence of separated parts. The
images are often rough and can be edited only in Microsoft
Office.
WMZ is Compressed Windows Metafile.
The PNG (Portable Network Graphics) is a
method to store images by compressing images with no loss of
information. PNG files can store colors with up to 48 bits
per pixel and gray scales with up to 16 bits per pixel.
Moreover, it can also store an optional alpha channel for
transparency. When PNG is used in the connected network, it
can correct gamma and color of images automatically. So you
can accurately render the images on different display
devices.
To convert gif wmf wmz to png file,
please download
PNG
Still Creator.
Other image
format definition:
CGM, short for Computer Graphic Metafile, is an
internationally standardized file format used by many
organizations including BSI and ANSI. It contains
information about both vector and bitmap and it is still
popular in engineering, aviation, and other technical
applications. CGM format could accumulate a wide range of
graphical information and geometric primitives as a
metafile. But it still has largely been replaced by formats
such as SVG and DXF. |
|
