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<div class="sect2" lang="en" xml:lang="en">
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<div>
<h3 class="title"><a id="plug-in-sample-colorize"></a>3.8. Sample Colorize</h3>
</div>
</div>
</div>
<a id="id3357286" class="indexterm"></a>
<div class="mediaobject">
<img src="../images/filters/filters-colormap-samplecolorize.png" />
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<div class="simplesect" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3358048"></a>Overview</h4>
</div>
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</div>
<p>
This filter is found in
<span class="guimenuitem">Image>Filters/Colors/Map/<span class="accel">S</span>ample Colorize</span>
</p>
<p>
This filter allows you to colorize old black-and-white images by mapping
a color source image or
a gradient against it.
</p>
<div class="caution" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Caution">
<tr>
<td rowspan="2" align="center" valign="top" width="25">
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</td>
<th align="left">Caution</th>
</tr>
<tr>
<td colspan="2" align="left" valign="top">
<p>
Your gray-tone image must be changed to RGB before using this
filter (Image/Image>Mode>RGB).
</p>
</td>
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<div class="simplesect" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3358383"></a>Options</h4>
</div>
</div>
</div>
<p>
The filter window is divided into two parts: Destination on the left, Sampling on the right.
</p>
<div class="variablelist">
<dl>
<dt>
<span class="term">Destination , Sample</span>
</dt>
<dd>
<p>
By default, displayed image previews reproduce the image from which you invoked the filter.
</p>
<p>
<span class="guilabel">The sample</span> can be the whole preview, or a selection of this preview.
With the drop list, you can select another sample-image among the names of images present on
your screen when you called the filter. If you choose <span class="guilabel">From Gradient</span> (or
<span class="guilabel">From Inverse Gradient</span>), the selected gradient in Gradient Dialog (or its
inverse) will be the sample. It will be displayed into the gradient bar below the sample
preview. The sampling preview is greyed out and two cursors allow you to select the gradient
range that will be applied to the image or selection.
</p>
<p>
<span class="guilabel">Destination</span> is, by default, the source image. The drop list displays the
list of images present on your screen when you evoked the filter and allow you to select
another destination image. If there is a selection in this image, it will be grayscaled, else
the whole preview will be grayscaled.
</p>
</dd>
<dt>
<span class="term">Show Selection</span>
</dt>
<dd>
<p>
This option toggles between the whole image and the selection, if it exists.
</p>
</dd>
<dt>
<span class="term">Show Colors</span>
</dt>
<dd>
<p>
This option toggles between colors and greyscale.
</p>
</dd>
<dt>
<span class="term">Get Sample Colors</span>
</dt>
<dd>
<p>
When you click on this button, the gradient bar below the sample preview displays colors of
the sample. If your sample holds few colors, transitions may be abrupt. Check
<span class="guilabel">Smooth Sample Colors</span> option to improve them.
</p>
<p>
<span class="guilabel">Use Subcolors</span> is more difficult to understand. Let's say first that in a
greyscale image there is information only for Value (luminosity, more or less light). In a
RGB image, each pixel has information for the three colors and Value. So, pixels with
different color may have the same Value. If this option is checked, colors will be mixed and
applied to Destination pixels having that Value. If it is unchecked, then the dominating
color will be applied.
</p>
</dd>
<dt>
<span class="term">Out Levels</span>
</dt>
<dd>
<p>
Two input boxes and two sliders act the same: they limit the color range which will be applied
to destination image. You can choose this range accurately. Result appears interactively in
destination preview.
</p>
</dd>
<dt>
<span class="term">In Levels</span>
</dt>
<dd>
<p>
Three input boxes and three sliders allow to fix importance of dark tones, mid tones and
light tones. Result appears interactively in destination preview.
</p>
</dd>
<dt>
<span class="term">Apply Button</span>
</dt>
<dd>
<p>
When you are satisfied with the result on destination preview, click on
<span class="guibutton">Apply</span> to apply results onto destination image.
</p>
</dd>
<dt>
<span class="term">Hold Intensity</span>
</dt>
<dd>
<p>
If this option is checked, the average light intensity of destination image will be the same
as that of source image.
</p>
</dd>
<dt>
<span class="term">Original Intensity</span>
</dt>
<dd>
<p>
If this option is checked, the In levels intensity settings will not be taken in account:
original intensity will be preserved.
</p>
</dd>
</dl>
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