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Image file formats
l GIF. GIF is a compressed file format suitable for an image that will
be used on the Web or on multiple platforms. Cannot be used with
True Color output type.
l JPEG. JPEG is a compressed file format for images. Its strengths
are small file sizes and speed. The trade-off for these advantages,
though, is reduced image quality. Because each time an image is
compressed with JPEG it loses a little of the image data, avoid
compressing a file with JPEG more than once. JPEG is an
appropriate file format for an image that will be used on the Web or
on multiple platforms.
You can save your JPEG file as a progressive JPEG. When used
on a Web page, a progressive JPEG is initially sent as just every
other line, with the remaining lines sent immediately after. This
allows a (somewhat blurry) image to display sooner. Most people
prefer this. JPEG can be used only with True Color and Grayscale
output types.
l PNG. A compressed image file format that might replace GIF. Like
GIF, PNG uses non-lossy compression, which means all the visual
data is saved and restored when the file is decompressed. Unlike
GIF, PNG can be used with True Color and Grayscale output types.
l PICT. Apple's proprietary image file format that is used by the
Macintosh operating system. Designed for the screen, this format
is best used for color images that will not be printed. Images saved
as PICT files are smaller in size than images saved as a TIFF files.
l PDF. PDF is a format useful for text, photos, and drawings. Use
Adobe Acrobat Reader to view PDF files. If no changes need to be
made to the file, this file type is useful for sharing (as through
e-mail) and filing because of its generally small file size. When
using the Macintosh version of the scanning software, you can only
create image-only PDF files; you cannot copy text from these files.
l TIFF. Usually created by scanners, TIFF files are widely accepted
by programs that work with photographs and other images. A TIFF
file is a bitmapped graphic (also called a raster graphic) and can be
any resolution. TIFF image files can be used on multiple platforms.
l TIFF compressed. TIFF compressed files for images are smaller
than standard TIFF files.
Text or text-and-image file formats
l HTML. HTML is useful for text and graphics that will be viewed on
the World Wide Web. When this format is selected for a scanned
image containing both text and images, the text is converted to
editable text and is saved as HTML, and the graphics are saved as
GIF or JPEG files.
l Rich Text. The RTF format can be used with a page that contains
text or text and pictures. The formatting of text in an RTF file can
usually be retained and then interpreted by other programs.
l Tex t. Use text file format for saving only the text in the selection
area. Text will be editable, unformatted, ASCII text.