The target compression type for the re-encoding of monochrome
images. Most monochrome images are black and white.
When the CompressImages setting
is used this option is used to determine the type of compression to
be used for images in this color space. Images are recompressed if
they are resampled or if the target compression type is lossy. They
are not recompressed if they already use the target compression and
the compression type is lossless.