2022.2

l
Monochrome images group
l
Compression: Select the compression to use for the monochrome images. Flate com-
pression is lossless, so no data is lost during compression. Flate Mono works well on
images with large areas of solid shades or repeating patterns, such as screen shots and
simple images created with paint or drawing programs. CCITT typically yields the best com-
pression of monochrome images. It is the compression method developed for fax trans-
missions. Note that configurations that were created with an earlier version of PlanetPress
Workflow and that included tasks set not to use any compression will by default be set to
use the Flate compression method.
l
Resolution: Select the resolution to use for monochrome images.
l
Grayscale images group
l
Compression: Select the compression to use for the grayscale 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 cre-
ated 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 Workflow and that included tasks set not to use any com-
pression will by default be set to use the Flate compression method.
l
Downsampling: Select the down sampling option. Down sampling 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 down
sampling process. Select None to prevent grayscale down sampling. 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
Resolution: Select the resolution to use for grayscale images. Note that this setting has an
impact on the grayscale down sampling process.
Page 457