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<th colspan="3" align="center">2.5. Selective Gaussian Blur</th>
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<th colspan="3" align="center" id="chaptername">2.5. Save as</th>
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<th width="60%" align="center">2. Blur filters</th>
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<div class="titlepage">
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<h3 class="title"><a id="filters-blur-gaussselect"></a>2.5. Selective Gaussian Blur</h3>
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<a id="id2969228" class="indexterm"></a>
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<div class="mediaobject">
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<img src="../images/filters/filters-blur-gaussselect.png" />
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<div class="simplesect" lang="en" xml:lang="en">
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<div class="titlepage">
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<h4 class="title"><a id="id2969265"></a>Overview</h4>
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This filter is found in
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<span class="guimenuitem">Image>Filters/Blur/<span class="accel">S</span>elective Gaussian Blur</span>
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Contrary to the other blur plugins, the Selective Gaussian Blur plugin doesn't act on all pixels:
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blur is applied only if the difference between its value and the value of the surrounding
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pixels is less than a defined Delta value. So, contrasts are preserved because difference is high on
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contrast limits. It is used to blur a background so that the foreground subject will stand out
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better. This add a sense of depth to the image with only a single operation.
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<div class="simplesect" lang="en" xml:lang="en">
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<div class="titlepage">
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<h4 class="title"><a id="id2969302"></a>Options</h4>
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<div class="variablelist">
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<span class="term">Blur Radius</span>
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Here you can set the blur intensity, in pixels.
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<span class="term">Max. Delta</span>
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Here you can set the maximum difference (0-255) between the pixel value and the surrounding
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pixel values. Above this Delta, blur will not be applied to that pixel.
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<h3 class="title"><a id="gimp-file-save-as"></a>2.5. Save as</h3>
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<a id="id3346179" class="indexterm"></a>
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This command can be found in an image menu as
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<span class="guimenu">File</span>-><span class="guimenuitem">Save As</span>.
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If you have saved the image previously and don't need to
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change the file name or any choices for options, you can use the
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<a href="ch05s02s04.html" title="2.4. Save">Save</a> command instead.
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<div class="simplesect" lang="en" xml:lang="en">
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<div class="titlepage">
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<h4 class="title"><a id="id3346704"></a>The Save Dialog</h4>
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<div class="informalfigure">
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<div class="mediaobject">
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<img src="../images/using/file-save-dialog-basic.png" />
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The basic File Save dialog
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Activating this command brings up the "File Save" dialog. In
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its basic form, as shown above, this gives you an entry to use
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to assign a name to the file, and a dropdown list of bookmarks
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to use to select a directory to save it in. Normally the file
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format is determined by the extension you use in the file name
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(i.e., .jpg for a JPEG file). You can use the "Select File
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Type" option expander to pick a different file type, but you
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should avoid doing this unless absolutely necessary, because it
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If the directory you want is not in the list of bookmarks, click
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on "Browse for other folders" to expand the dialog into its full
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form. You can find an explanation of the layout, and help on
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creating and using bookmarks, in the <a href="ch02s05.html" title="5. Files">Files</a> section.
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<div class="informalfigure">
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<div class="mediaobject">
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<img src="../images/using/file-save-dialog-browse.png" />
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The expanded File Save dialog
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If you want to save the image into a folder that doesn't yet
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exist, you can create it by clicking "Create Folder" and
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following the instructions.
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如果您要保存图像到尚未存在的文件夹中时，点击“创建文件夹”并根据其指令进行操作。
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