AI:
Native Adobe Illustrator source
file format. Vector based. This file format is
derived from the industry standard vector drawing
program.
BMP:
BMP is a standard Microsoft Windows image format
on DOS and Microsoft Windows compatible computers.
BMP format supports RGB, Indexed Colour, Grayscale,
and Bitmap colour modes. You can specify either
Windows or OS/2® format and a bit depth for
the image. For 4-bit and 8-bit images using the
Windows format, you can also specify RLE compression.
BMP images are normally written bottom to top;
however, you can select the Flip Row Order option
to write them from top to bottom. You can also
select an alternate encoding method by clicking
Advanced Modes. (Flip Row Order and Advanced Modes
are most relevant to game programmers and others
using DirectX graphics software.)
EPS:
The Encapsulated PostScript (EPS) language file
format can contain both vector and bitmap graphics
and is supported by virtually all graphic, illustration,
and page-layout programs. EPS format is used to
transfer PostScript-language artwork between applications.
The EPS format supports Lab, CMYK, RGB, Indexed
Colour, Duotone, Grayscale, and Bitmap colour
modes, and does not support alpha channels. EPS
does support clipping paths. Desktop Colour Separations
(DCS) format, a version of the standard EPS format,
lets you save colour separations of CMYK images.
To print EPS files, you must use a PostScript
printer.
GIF:
The Graphics Interchange Format
(GIF) is the file format commonly used to display
indexed-colour graphics and images in hypertext
markup language (HTML) documents over the World
Wide Web and other online services. GIF is an
LZW-compressed format designed to minimize file
size and electronic transfer time. GIF format
preserves transparency in indexed-colour images;
however, it does not support alpha channels.
JPEG:
The Joint Photographic Experts
Group (JPEG) format is commonly used to display
photographs and other continuous-tone images in
hypertext markup language (HTML) documents over
the World Wide Web and other online services.
JPEG format supports CMYK, RGB, and Grayscale
colour modes, and does not support alpha channels.
Unlike GIF format, JPEG retains all colour information
in an RGB image but compresses file size by selectively
discarding data.
A JPEG image is automatically decompressed when
opened. A higher level of compression results
in lower image quality, and a lower level of compression
results in better image quality. In most cases,
the Maximum Quality option produces a result indistinguishable
from the original.
PCX:
The PCX format is commonly used
by IBM PC-compatible computers. Most PC software
supports version 5 of the PCX format. A standard
VGA colour palette is used with version 3 files,
which do not support custom colour palettes.
PCX format supports RGB, Indexed Colour, Grayscale,
and Bitmap colour modes, and does not support
alpha channels. PCX supports the RLE compression
method. Images can have a bit depth of 1, 4, 8,
or 24.
PDF:
The Portable Document Format
(PDF) is a flexible, cross-platform, cross-application
file format. Based on the PostScript imaging model,
PDF files accurately display and preserve fonts,
page layouts, and both vector and bitmap graphics.
In addition, PDF files can contain electronic
document search and navigation features such as
electronic links.
PDF files are created using applications like
Adobe Acrobat and Adobe Illustrator, and can contain
multiple pages and images.
PICT File:
The PICT format is widely used among Mac OS graphics
and page-layout applications as an intermediary
file format for transferring images between applications.
PICT format supports RGB images with a single
alpha channel, and indexed-colour, grayscale,
and Bitmap-mode images without alpha channels.
The PICT format is especially effective at compressing
images with large areas of solid color. This compression
can be dramatic for alpha channels with their
large areas of white and black.
When saving an RGB image in PICT format, you
can choose either a 16-bit or 32-bit pixel resolution.
For a grayscale image, you can choose from 2,
4, or 8 bits per pixel. In Mac OS with QuickTime
installed, four JPEG compression options are available.
PICT Resource:
(Mac OS) A PICT resource is
a PICT file contained in a Mac OS file's resource
fork; for example, an application's splash screen
or the contents of the Scrapbook. The PICT Resource
format supports RGB images with a single alpha
channel, and indexed-colour, grayscale, and Bitmap-mode
images without alpha channels.
Pixar:
The Pixar format is designed
specifically for high-end graphics applications,
such as those used for rendering three-dimensional
images and animation. The Pixar format supports
RGB and grayscale images with a single alpha channel.
PNG:
Developed as a patent-free alternative
to GIF, Portable Network Graphics (PNG) format
is used for lossless compression and for display
of images on the World Wide Web. Unlike GIF, PNG
supports 24-bit images and produces background
transparency without jagged edges; however, some
Web browsers do not support PNG images. PNG format
supports RGB, indexed-color, grayscale, and Bitmap-mode
images without alpha channels. PNG preserves transparency
in grayscale and RGB images.
PSD:
The Native Adobe Photoshop file
format. This file format is derived from the industry
standard vector drawing program
Targa:
The TGA (Targa®) format is
designed for systems using the Truevision®
video board and is commonly supported by MS-DOS
colour applications. Targa format supports 16-bit
RGB images (5 bits x 3 color channels, plus one
unused bit), 24-bit RGB images (8 bits x 3 colour
channels), and 32-bit RGB images (8 bits x 3 colour
channels plus a single 8-bit alpha channel). Targa
format also supports indexed-colour and grayscale
images without alpha channels. When saving an
RGB image in this format, you can choose a pixel
depth and select RLE encoding to compress the
image.
TIFF:
The Tagged-Image File Format
(TIFF) is used to exchange files between applications
and computer platforms. TIFF is a flexible bitmap
image format supported by virtually all paint,
image-editing, and page-layout applications. Also,
virtually all desktop scanners can produce TIFF
images.
TIFF format supports CMYK, RGB, Lab, indexed-colour,
and grayscale images with alpha channels and Bitmap-mode
images without alpha channels.