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<li class="toctree-l3 current"><a class="current reference internal" href="#">Minimum/Maximum</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="#std.Minimum"><code class="docutils literal notranslate"><span class="pre">Minimum()</span></code></a></li>
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<li class="toctree-l4"><a class="reference internal" href="#std.Maximum"><code class="docutils literal notranslate"><span class="pre">Maximum()</span></code></a></li>
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<section id="minimum-maximum">
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<h1>Minimum/Maximum<a class="headerlink" href="#minimum-maximum" title="Permalink to this heading"></a></h1>
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<dl class="py function">
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<dt class="sig sig-object py" id="std.Minimum">
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<span class="sig-prename descclassname"><span class="pre">std.</span></span><span class="sig-name descname"><span class="pre">Minimum</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="pre">vnode</span> <span class="pre">clip[,</span> <span class="pre">int[]</span> <span class="pre">planes=[0,</span> <span class="pre">1,</span> <span class="pre">2],</span> <span class="pre">float</span> <span class="pre">threshold,</span> <span class="pre">bint[]</span> <span class="pre">coordinates=[1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1]]</span></em><span class="sig-paren">)</span><a class="headerlink" href="#std.Minimum" title="Permalink to this definition"></a></dt>
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<dd><p>Replaces each pixel with the smallest value in its 3x3 neighbourhood.
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This operation is also known as erosion.</p>
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<dl>
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<dt><em>clip</em></dt><dd><p>Clip to process. It must have integer sample type and bit depth
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between 8 and 16, or float sample type and bit depth of 32. If
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there are any frames with other formats, an error will be
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returned.</p>
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</dd>
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<dt><em>planes</em></dt><dd><p>Specifies which planes will be processed. Any unprocessed planes
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will be simply copied.</p>
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</dd>
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<dt><em>threshold</em></dt><dd><p>Allows to limit how much pixels are changed. Output pixels will not
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become less than <code class="docutils literal notranslate"><span class="pre">input</span> <span class="pre">-</span> <span class="pre">threshold</span></code>. The default is no limit.</p>
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</dd>
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<dt><em>coordinates</em></dt><dd><p>Specifies which pixels from the 3x3 neighbourhood are considered.
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If an element of this array is 0, the corresponding pixel is not
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considered when finding the minimum value. This must contain exactly
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8 numbers.</p>
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<p>Here is how each number corresponds to a pixel in the 3x3
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neighbourhood:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="mi">1</span> <span class="mi">2</span> <span class="mi">3</span>
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<span class="mi">4</span> <span class="mi">5</span>
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<span class="mi">6</span> <span class="mi">7</span> <span class="mi">8</span>
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</pre></div>
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</div>
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</dd>
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</dl>
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</dd></dl>
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<dl class="py function">
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<dt class="sig sig-object py" id="std.Maximum">
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<span class="sig-prename descclassname"><span class="pre">std.</span></span><span class="sig-name descname"><span class="pre">Maximum</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="pre">vnode</span> <span class="pre">clip[,</span> <span class="pre">int[]</span> <span class="pre">planes=[0,</span> <span class="pre">1,</span> <span class="pre">2],</span> <span class="pre">float</span> <span class="pre">threshold,</span> <span class="pre">bint[]</span> <span class="pre">coordinates=[1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1,</span> <span class="pre">1]]</span></em><span class="sig-paren">)</span><a class="headerlink" href="#std.Maximum" title="Permalink to this definition"></a></dt>
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<dd><p>Replaces each pixel with the largest value in its 3x3 neighbourhood.
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This operation is also known as dilation.</p>
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<dl>
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<dt><em>clip</em></dt><dd><p>Clip to process. It must have integer sample type and bit depth
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between 8 and 16, or float sample type and bit depth of 32. If
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there are any frames with other formats, an error will be
|
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returned.</p>
|
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</dd>
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<dt><em>planes</em></dt><dd><p>Specifies which planes will be processed. Any unprocessed planes
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will be simply copied.</p>
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</dd>
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<dt><em>threshold</em></dt><dd><p>Allows to limit how much pixels are changed. Output pixels will not
|
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become less than <code class="docutils literal notranslate"><span class="pre">input</span> <span class="pre">-</span> <span class="pre">threshold</span></code>. The default is no limit.</p>
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</dd>
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<dt><em>coordinates</em></dt><dd><p>Specifies which pixels from the 3x3 neighbourhood are considered.
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If an element of this array is 0, the corresponding pixel is not
|
|
considered when finding the maximum value. This must contain exactly
|
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8 numbers.</p>
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<p>Here is how each number corresponds to a pixel in the 3x3
|
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neighbourhood:</p>
|
|
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="mi">1</span> <span class="mi">2</span> <span class="mi">3</span>
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<span class="mi">4</span> <span class="mi">5</span>
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<span class="mi">6</span> <span class="mi">7</span> <span class="mi">8</span>
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</pre></div>
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</div>
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</dd>
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</dl>
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</dd></dl>
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