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.
Exif (Exchangeable Image File) is a
specification for the image file format used by digital
cameras. It can store digital photograph’s properties
information and the shooting data. Exif is introduced by the
Japan Electronic Industries Development Association (JEIDA).
Version 2.2 is dated April 2002. Exif is existing in JPEG,
TIFF, RIFF files, with the addition of specific metadata
tags. It is not supported in JPEG 2000, PNG, or GIF.
JPEG (Joint Photographic Experts
Group) is a way to store images by compressing digital
images, especially for natural or real scenes. However, it
is not suite for online drawings and cartoons. When
compressing images, some information will be lost. But human
eyes won’t find the inconspicuous difference.
To convert gif exif to jpg file,
PCX is an image file format specially used by drawing
program based on PC. It’s the format developed when ZSOFT
Corporation was developing Paintbrush (the image processing
software). PCX format is supported by desktop layout or
image art software as well as video capture software. It
supports 256-color palette or all 24bit RGB, while it
doesn’t support CMYK or HSI color mode.