gimpprint-color
GIMPPRINT-COLOR(7) Gimp-Print Manual Pages GIMPPRINT-COLOR(7)
NAME
gimpprint-color - Gimp-Print color balancing
DESCRIPTION
Gimp-Print includes several color balancing controls. These may be
used to adjust the original image's brightness and contrast and gamma,
and the density and saturation 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 yel-
low 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 per-
fectly 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 cho-
sen.
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 cor-
rection. 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 get-
ting 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@whinlat-
ter.uklinux.net)
SEE ALSO
gimpprint-dithers(7), gimpprint-imagetypes(7), gimpprint-inktypes(7),
gimpprint-mediasizes(7), gimpprint-mediasources(7), gimpprint-medi-
atypes(7), gimpprint-models(7), gimpprint-resolutions(7).
Version 4.2.4 25 Nov 2002 GIMPPRINT-COLOR(7)
