GIMPPRINT-COLOR(7) Gimp-Print Manual Pages GIMPPRINT-COLOR(7)NAMEgimpprint-color - Gimp-Print color balancing
DESCRIPTION
Gimp-Print includes several color balancing controls.
These may be used to adjust the original image's bright-
ness and contrast and gamma, and the density and satura-
tion of the output, as well as the individual cyan,
magenta and yellow levels.
COLOR BALANCING
Cyan
Magenta
Yellow The range of values is 0.0 - 4.0, and defaults to
1.0. These three options allow specification of
the cyan, magenta, and yellow levels independently,
for rebalancing the levels. Normally, these should
be adjusted to yield neutral gray, but they can be
used for other effects.
Brightness
The range of values is 0.0 - 2.0, and defaults to
1.0. This adjusts the brightness of the image.
0.0 gives a fully black image; 2.0 gives a fully
white image. Values greater than 1 will result in
black not being solid and highlights turning white;
values less than 1 will result in white not being
perfectly clear and shadows turning black.
Contrast
The range of values is 0.0 - 4.0, and defaults to
1.0. Adjust the contrast of the image. 0.0 gives
a solid gray for the entire image, the exact gray
depending upon the brightness chosen.
Gamma The range of values is 0.1 - 4.0, and defaults to
1.0. Adjust the gamma of the image, over and above
the printer-specific correction. Gamma less than
1.0 will result in a darker image; gamma greater
than 1.0 will result in a lighter image. Unlike
brightness, gamma adjustment does not change the
endpoints; it merely changes the shape of the
input->output curve.
Density
The range of values is 0.1 - 2.0, and defaults to
1.0. Adjust the amount of ink deposited on the
paper. If you've chosen the correct paper type and
you're getting ink bleeding through the paper or
puddling, try reducing the density to the lowest
value you can while still achieving solid black.
If you're not getting solid black, even with the
contrast and brightness at 1.0, try increasing the
density.
All of the printers supported here actually need
less than 100% ink density in most cases, so the
actual density is something other than the nominal
density setting. The effective density setting
cannot go above 100%, so if a value specified will
result in an excessively high density level, it
will be silently limited to 1.0.
Saturation
The range of values is 0.0 - 9.0, and defaults to
1.0. Adjust the brilliance of colors. 0.0 results
in pure grayscale; using this with Color=1 is one
way of getting grayscale (see below under "Color"
for a full discussion). Saturation of less than
1.0 results in more muted colors; saturation of
greater than 1.0 results in more vibrant colors.
Very high saturation often results in very strange
effects, including posterization and banding that
might not be expected. For normal purposes, the
saturation should generally be less than 1.5.
COPYRIGHT
Copyright (C) 2001 Michael Sweet (mike@easysw.com) and
Robert Krawitz (rlk@alum.mit.edu)
This program is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation;
either version 2 of the License, or (at your option) any
later version.
This manual page was written by Roger Leigh (roger@whin-
latter.uklinux.net)
SEE ALSOgimpprint-dithers(7), gimpprint-imagetypes(7), gimpprint-
inktypes(7), gimpprint-mediasizes(7), gimpprint-media-
sources(7), gimpprint-mediatypes(7), gimpprint-models(7),
gimpprint-resolutions(7).
Version 4.2.5 24 Jan 2003 GIMPPRINT-COLOR(7)
