About
Raster Images: EPS vs TIFF
Raster EPS Format
The
Encapsulated PostScript, or EPS file format is generally the
preferred format for importing vector-based images. On the Macintosh OS platform
it is the universal way of saving files from Macromedia FreeHand™ and
Adobe Illustrator™ and is often the best method for saving raster images
from Adobe PhotoShop™.
The primary reasons to use the raster EPS file format include:
1. The use of clipping paths to mask objects.
2. Saving Duotones with Pantone Colors
3. Setting the screen and transfer functions
4. Having the option for saving whites as transparent. This enables users to set the background color later in a page layout application.
TIFF Format
The Tagged Image File Format, or TIFF, was developed to offer
a convenient means of saving graphics that are scanned or generated electronically.
The TIFF format is especially versatile for use with PostScript and non-PostScript
printing devices. It is based on reducing an image to a bitmap representation
of the artwork very much like a drawing made using the squares on graph paper.
In addition, the TIFF format offers some unique features when imported into
Quark XPress™, Macromedia FreeHand™ or Adobe PageMaker™:
1. Grayscale or Bitmap images saved as TIFFs can be altered after being imported into these programs by manipulating certain attributes using the Style (Quark Xpress™), Element Info (FreeHand™), or Image Control (PageMaker™) menus.
2. Quark Xpress™ allows you to set screen type, angle and frequency, and to adjust contrast and foreground and background colors as desired.
3. Pagemaker™ allows users to set screen angle and frequency, contrast and foreground colors as desired.
4. After placing a 4-color TIFF, PageMaker™ and Quark Xpress™ allow users to alter image contrast, although this is better controlled in PhotoShop™.
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