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- <title>Chapter 6. Filters</title>
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- <div class="chapter" lang="en" xml:lang="en">
- <div class="titlepage">
- <div>
- <div>
- <h2 class="title"><a id="filters"></a>Chapter 6. Filters</h2>
- </div>
- </div>
- </div>
- <div class="toc">
- <p>
- <b>Table of Contents</b>
- </p>
- <dl>
- <dt>
- <span class="sect1">
- <a href="ch06.html#filter-introduction">1. Filter introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect1">
- <a href="ch06s02.html">2. Blur filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s02.html#filters-blur-introduction">2.1. Blur filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s02s02.html">2.2. Blur</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s02s03.html">2.3. Gaussian Blur</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s02s04.html">2.4. Selective Gaussian Blur</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s02s05.html">2.5. Motion Blur</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s02s06.html">2.6. Pixelise</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s02s07.html">2.7. Tileable Blur</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s03.html">3. Color filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s03.html#filters-color-introduction">3.1. Color filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s02.html">3.2. Adjust FG-BG</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s03.html">3.3. Alien Map</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s04.html">3.4. Alien Map 2</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s05.html">3.5. Two Colors Exchange</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s06.html">3.6. Colormap Rotation</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s07.html">3.7. Map Color Range</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s08.html">3.8. Sample Colorize</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s09.html">3.9. Gradient Map</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s10.html">3.10. Border Average</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s11.html">3.11. Channel Mixer</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s12.html">3.12. Color Cube Analysis</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s13.html">3.13. Colorify</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s14.html">3.14. Color to Alpha</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s15.html">3.15. Compose</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s16.html">3.16. Decompose</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s17.html">3.17. Filter Pack</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s18.html">3.18. Hot</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s19.html">3.19. Max RGB</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s20.html">3.20. Semi-Flatten</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s21.html">3.21. Smooth Palette</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s03s22.html">3.22. Value invert</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s04.html">4. Noise filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s04.html#filters-noise-introduction">4.1. Noise filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s04s02.html">4.2. Hurl</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s04s03.html">4.3. Noisify</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s04s04.html">4.4. Pick</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s04s05.html">4.5. Scatter HSV</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s04s06.html">4.6. Slur</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s04s07.html">4.7. Spread</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s05.html">5. Edge-detect filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s05.html#filters-edges-introduction">5.1. Edge-detect introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s05s02.html">5.2. Edge</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s05s03.html">5.3. Difference of Gaussians</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s05s04.html">5.4. Laplace</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s05s05.html">5.5. Sobel</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s06.html">6. Enhance filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s06.html#filters-enhance-introduction">6.1. Enhance filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s06s02.html">6.2. Deinterlace</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s06s03.html">6.3. Despeckle</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s06s04.html">6.4. Destripe</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s06s05.html">6.5. NL Filter</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s06s06.html">6.6. Sharpen</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s06s07.html">6.7. Unsharp Mask</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s07.html">7. Generic filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s07.html#filters-generic-introduction">7.1. Generic filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s07s02.html">7.2. Convolution matrix</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s07s03.html">7.3. Dilate</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s07s04.html">7.4. Erode</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s08.html">8. Glass Effects filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s08.html#filters-glass-effects-introduction">8.1. Glass Effects filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s08s02.html">8.2. Apply Lens</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s08s03.html">8.3. Glass Tile</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s09.html">9. Light Effects filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s09.html#filters-light_effects-introduction">9.1. Light Effects filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s09s02.html">9.2. FlareFX</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s09s03.html">9.3. Gflare</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s09s04.html">9.4. Lighting Effects</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s09s05.html">9.5. Sparkle</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s09s06.html">9.6. SuperNova</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s10.html">10. Distort filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s10.html#filters-distort-introduction">10.1. Distort filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s02.html">10.2. Blinds</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s03.html">10.3. Curve Bend</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s04.html">10.4. Emboss</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s05.html">10.5. IWarp</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s06.html">10.6. Mosaic</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s07.html">10.7. Page Curl</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s08.html">10.8. Polar Coords</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s09.html">10.9. Ripple</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s10.html">10.10. Shift</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s11.html">10.11. Newsprint</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s12.html">10.12. Video</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s13.html">10.13. Value Propagate</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s14.html">10.14. Waves</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s15.html">10.15. Whirl and Pinch</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s10s16.html">10.16. Wind</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s11.html">11. Artistic filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s11.html#filters-artistic-introduction">11.1. Artistic filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s11s02.html">11.2. Apply Canvas</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s11s03.html">11.3. Cubism</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s11s04.html">11.4. GIMPressionist</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s11s05.html">11.5. GIMPressionist- Orientation Map Editor</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s11s06.html">11.6. GIMPressionist- Size Map Editor</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s11s07.html">11.7. Oilify</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s12.html">12. Rendering filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s12.html#filters-render-introduction">12.1. Render filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s02.html">12.2. Plasma</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s03.html">12.3. Solid Noise</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s04.html">12.4. Flame</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s05.html">12.5. IFS Compose</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s06.html">12.6. Diffraction Patterns</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s07.html">12.7. Grid</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s08.html">12.8. Jigsaw</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s09.html">12.9. Maze</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s10.html">12.10. QBist</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s12s11.html">12.11. Sinus</a>
- </span>
- </dt>
- </dl>
- </dd>
- <dt>
- <span class="sect1">
- <a href="ch06s13.html">13. Combine filters</a>
- </span>
- </dt>
- <dd>
- <dl>
- <dt>
- <span class="sect2">
- <a href="ch06s13.html#filters-combine-introduction">13.1. Combine filters introduction</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s13s02.html">13.2. Depth Merge</a>
- </span>
- </dt>
- <dt>
- <span class="sect2">
- <a href="ch06s13s03.html">13.3. Film</a>
- </span>
- </dt>
- </dl>
- </dd>
- </dl>
- </div>
- <div class="sect1" lang="en" xml:lang="en">
- <div class="titlepage">
- <div>
- <div>
- <h2 class="title" style="clear: both"><a id="filter-introduction"></a>1. Filter introduction</h2>
- </div>
- </div>
- </div>
- <a id="id3471574" class="indexterm"></a>
- <p>
- A filter is a special kind of tool designed to take an input layer or
- image, apply a mathematical algorithm to it, and return the input layer or
- image in a modified format. <span class="application">The GIMP</span> uses
- filters to achieve a variety of effects and those effects are discussed
- here.
- </p>
- <p>
- The filters are divided into several categories:
- </p>
- <div class="itemizedlist">
- <ul type="disc">
- <li>
- <p>Blur</p>
- </li>
- <li>
- <p>Colors</p>
- </li>
- <li>
- <p>Noise</p>
- </li>
- <li>
- <p>Edge-Detect</p>
- </li>
- <li>
- <p>Enhance</p>
- </li>
- <li>
- <p>Generic</p>
- </li>
- <li>
- <p>Glass Effects</p>
- </li>
- <li>
- <p>Light Effects</p>
- </li>
- <li>
- <p>Distorts</p>
- </li>
- <li>
- <p>Artistic</p>
- </li>
- <li>
- <p>Map</p>
- </li>
- <li>
- <p>Render</p>
- </li>
- <li>
- <p>Web</p>
- </li>
- <li>
- <p>Animation</p>
- </li>
- <li>
- <p>Combine</p>
- </li>
- </ul>
- </div>
- <p>
- </p>
- </div>
- </div>
- <div class="navfooter">
- <hr />
- <table width="100%" summary="Navigation footer">
- <tr>
- <td width="40%" align="left"><a accesskey="p" href="ch05s09.html">Prev</a> </td>
- <td width="20%" align="center">
- <a accesskey="u" href="index.html">Up</a>
- </td>
- <td width="40%" align="right"> <a accesskey="n" href="ch06s02.html">Next</a></td>
- </tr>
- <tr>
- <td width="40%" align="left" valign="top">9. Filters </td>
- <td width="20%" align="center">
- <a accesskey="h" href="index.html">Home</a>
- </td>
- <td width="40%" align="right" valign="top"> 2. Blur filters</td>
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