7.1

compression method.
l Monochrome resolution: Select the resolution to use for monochrome images.
l Grayscale images group
l Grayscale compression: Select the compression to use for the grayscale images. Flate is a lossless com-
pression method, so no data is lost in the process. It works well on images with large areas of single shades or
repeating patterns, such as screen shots and simple images created with paint or drawing programs. JPEG
removes image data and may reduce image quality, but may be suitable for continuous-tone photographs con-
taining more detail than can be reproduced onscreen or in print. Since JPEG eliminates data, it can achieve much
smaller file sizes than Flate compression. Select Auto to let the application choose the best compression method
automatically. Note that configurations that were created with an earlier version of PlanetPress Suite Workflow
Tools and that included tasks set not to use any compression will by default be set to use the Flate compression
method.
l Grayscale downsampling: Select the downsampling option. Downsampling reduces image size by breaking
images down into small areas in which multiple pixels are replaced by single pixels. The Grayscale resolution
you enter in the following box is used to control the downsampling process. Select None to prevent grayscale
downsampling. Select Average to average pixel shades in each sample area and to replace the entire area with
a pixel of the average shade. Select Subsample to use a pixel in the center of the sample area and replace the
entire area with that pixel value. This method is significantly faster, but results in images that are less smooth.
Select Bicubic to use a weighted average to determine pixel shades. This method is the slowest but most precise
and results in the smoothest tonal gradations.
l Grayscale resolution: Select the resolution to use for grayscale images. Note that this setting has an
impact on the grayscale downsampling process.
l Color images group
l Color compression: Select the compression to use for the color images. Flate is a lossless compression
method, so no data is lost in the process. It works well on images with large areas of single shades or repeating
patterns, such as screen shots and simple images created with paint or drawing programs. JPEG removes
image data and may reduce image quality, but may be suitable for continuous-tone photographs containing
more detail than can be reproduced onscreen or in print. Since JPEG eliminates data, it can achieve much
smaller file sizes than Flate compression. Select Auto to let the application choose the best compression method
automatically. Note that configurations that were created with an earlier version of PlanetPress Suite Workflow
Tools and that included tasks set not to use any compression will by default be set to use the Flate compression
method.
l Color downsampling: Select the downsampling option. Downsampling reduces image size by breaking
images down into small areas in which multiple pixels are replaced by single pixels. The Color resolution you
enter in the following box is used to control the downsampling process. Select None to prevent grayscale down-
sampling. Select Average to average pixel color in each sample area and to replace the entire area with a pixel
of the average color. Select Subsample to use a pixel in the center of the sample area and replace the entire
area with that pixel value. This method is significantly faster, but results in images that are less smooth. Select
Bicubic to use a weighted average to determine pixel shades. This method is the slowest but most precise and
results in the smoothest tonal gradations.
l Color resolution: Select the resolution to use for color images. Note that this setting has an impact on the
color downsampling process.
l Security group
l Permissions password: Enter a password in this box only if you want to prevent users who does not have
this password from changing the security options of the generated PDF files.
l PDF open password: Enter a password in this box only if you want to prevent users who does not have this
password from opening the generated PDF files.
l Allow printing: Select to let users print the generated PDF files.
l Allow changing the document: Select to let users edit the generated PDF files.
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