tdegraphics/doc/kgamma/index.docbook

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<!-- ................................................................ -->

<!-- The language must NOT be changed here. -->
<book lang="&language;">
<title>The Monitor Gamma Handbook</title>

<bookinfo>
<authorgroup>
<author>
<firstname>Michael</firstname>
<surname>v.Ostheim</surname>
</author>
<author>&tde-authors;</author>
</authorgroup>

<!-- TRANS:ROLES_OF_TRANSLATORS -->
<copyright>
<year>2001, 2002, 2003</year>
<holder>Michael v.Ostheim</holder>
</copyright>
<copyright>
<year>&tde-copyright-date;</year>
<holder>&tde-team;</holder>
</copyright>
<!-- Translators: put here the copyright notice of the translation -->

<legalnotice>&FDLNotice;</legalnotice>
<date>28/08/2003</date>
<releaseinfo>1.00.20</releaseinfo>

<!-- Abstract about this handbook -->
<abstract>
<para>&kgamma; is a simple tool for monitor gamma correction.</para>
</abstract>

<keywordset>
<keyword>TDE</keyword>
<keyword>KGamma</keyword>
<keyword>Monitor</keyword>
<keyword>Calibration</keyword>
<keyword>Gamma</keyword>
</keywordset>

</bookinfo>

<chapter id="introduction">
<title>Introduction</title>

<para>This document describes how to correct display monitor gamma.</para>
<para>With proper gamma settings, your display (websites, images, etc.) will look the same on your
monitor as on other monitors.</para>
<para>This tool allows you to alter the monitor's gamma correction of.
But that's not all to do. For good results you have to set the
correct brightness, contrast and color balance of your monitor. This
may be difficult and you have to repeat every step several times.
For perfect results you need really good (and expensive) hardware.</para>
<para>These are system settings, please do not use this tool to manipulate your
image files.</para>
</chapter>

<chapter id="using-kgamma">
<title>Using the Test Images</title>
<sect1 id="Setting-Gamma">
<title>Setting Gamma Correction</title>
<para>Use the four sliders to define the gamma correction either as a single
value, or separately for the red, green and blue components. The X-Server
default setting for gamma is 1.00 (Mac 1.80, WinXX 2.20). The test images help
you to find proper settings.</para>
<para>To store the gamma settings system wide, enable the option 'Store
settings to XF86Config'. The system settings will be restored at next X-Server
startup. You need root access to use this option. Use this if you want to
correct the gamma settings for all users and graphical environments on this
machine.</para>
<para>To store the gamma settings to your personal &tde; configuration, do not
enable that option. The user settings will be restored at next &tde; startup and
replace temporary the system gamma settings. The system settings are not removed by
that and will be restored at next X-Server startup.</para>
<para>On multi head systems, select the screen you want to alter with the combo
box. This will also work with xinerama enabled. If you want to set all screens
to the same gamma values, enable the 'Sync screens' option. On systems with only
one screen this option will take no effect.</para>
</sect1>

<sect1 id="Gray-Scale">
<title>Gray Scale Test Image</title>
<para>You should be able to see the following:</para>

<itemizedlist>
<listitem>
<para>A gray scale with 20 different sections</para>
</listitem>
<listitem>
<para>The darkest section pure black</para>
</listitem>
<listitem>
<para>The lightest section pure white</para>
</listitem>
<listitem>
<para>No hint of any color in the gray tones</para>
</listitem>
</itemizedlist>

<para>If you don't see all of the 20 sections, use your monitor's contrast settings
or the "Gamma" slider to correct this. If black is not pure black,
try to darken the monitor, if white is not pure white, try to lighten
it. If you see any colors in the gray tones alter the color balance settings of
your monitor or the "Red", "Green" and "Blue" slider.</para>
</sect1>

<sect1 id="RGB-Scale">
<title>RGB Scale Test Image</title>
<para>
You should be able to see three strips, each with 16 sections of red,
green or blue tones. The darkest sections should be pure black, the brightest
should be pure red, green or blue. If you don't see all sections of
a color strip, try to lighten or darken this color.</para>
</sect1>

<sect1 id="CMY-Scale">
<title>CMY Scale Test Image</title>
<para>
You should be able to see three strips, each with 11 sections of cyan,
magenta or yellow tones. The brightest sections should be pure white, the darkest
should be pure cyan, magenta or yellow.</para>

<itemizedlist>
<listitem>
<para>If you can't see all cyan sections, try to lighten or darken red</para>
</listitem>
<listitem>
<para>If you can't see all magenta sections, try to lighten or darken green</para>
</listitem>
<listitem>
<para>If you can't see all yellow sections, try to lighten or darken blue</para>
</listitem>
</itemizedlist>
</sect1>

<sect1 id="advanced">
<title>Advanced Test Images</title>
<para>
The following three pictures shows you the abilities of your monitor at
three points of the gray spectrum. If you can't see all of the details,
don't be worry, or buy better hardware.
</para>
<sect2 id="dark-gray">
<title>Dark Gray Test Image</title>
<para>
You should be able to see 10 different rectangles of dark gray within a
black box. The chart shows you 1% steps from black.
</para>
</sect2>
<sect2 id="mid-gray">
<title>Mid Gray Test Image</title>
<para>
This picture shows you 11 gray rectangles within a 50% gray box. You should be
able to see all of the rectangles except the middle one. The rectangles represent
the steps from 45% to 55% gray.
</para>
</sect2>
<sect2 id="light-gray">
<title>Light Gray Test Image</title>
<para>
You should be able to see 10 different rectangles of light gray within a white box.
The chart shows you 1% steps from white.
</para>
</sect2>
</sect1>

</chapter>

<chapter id="credits">
<title>Credits and License</title>

<para>
&kgamma;
</para>
<para>
Program copyright 2001, 2002, 3003 Michael v.Ostheim <email>ostheimm@users.berlios.de</email>
</para>

<para>
Documentation copyright 2001, 2002, 2003 Michael v.Ostheim <email>ostheimm@users.berlios.de</email>
</para>

<!-- TRANS:CREDIT_FOR_TRANSLATORS -->

&underFDL;           <!-- FDL: do not remove. -->
&underGPL;        	 <!-- GPL License -->
</chapter>

</book>