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 4.2.5                     24 Jan 2003               GIMPPRINT-COLOR(7)