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51
Adobe Acrobat Help
Acrobat Distiller Options
Using Help
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51
Applying compression and resampling
When converting files, you can have Distiller compress text and line art, and compress and
resample color, grayscale, and monochrome images. Depending on the settings you
choose, compression and resampling can significantly reduce the size of a PDF file with
little or no loss of detail and precision.
•
Line art, or vector graphics, is described with a mathematical equation; it is usually
created with a drawing program such as Adobe Illustrator®.
•
Images are described as pixels and are created with paint programs or from scanners.
Monochrome images include most black-and-white illustrations made by paint
programs and any images scanned with an image depth of 1 bit. Adobe Photoshop, for
example, works with images.
About methods of compression
Distiller applies ZIP compression to text and line art; ZIP or JPEG compression to color and
grayscale images; and ZIP, CCITT Group 3 or 4, or Run Length compression to
monochrome images.
Suitable compression methods for different source art types
A.
ZIP
B.
JPEG
C.
CCITT
D.
Run Length
•
ZIP is a compression method that works well on images with large areas of single colors
or repeating patterns, such as screen shots and simple images created with paint
programs, and for black-and-white images that contain repeating patterns. Acrobat
provides 4-bit and 8-bit ZIP compression options. If you use 4-bit ZIP compression with
4-bit images, or 8-bit ZIP with 4-bit or 8-bit images, the ZIP method is
lossless
, which
means it does not remove data to reduce file size and so does not affect an image’s
A
C
D
Handbook
COLBERT TECHNICAL GEAR
Chuck
Push Button
OAK
Sounds of Nature Vol.2
A
Young
Music Source
Sales Plan
Push Button Chuck
B
HOT AIR BALLOON
Napa, California
to SAN FRANCISCO
to EUREKA
N
ap
a-S
ono
ma
Hwy
Napa Road
Hwy 101
NAPA VALLEY
AIRWAY
V
in
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o
a
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NAPA
Winery Avenue
Come join us for the
wonderful festival in
the sky. Come join us
for the wonderful
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10/28-29/1999
6:30am-Sunset