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<section id="module-colorsys">
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<span id="colorsys-conversions-between-color-systems"></span><h1><a class="reference internal" href="#module-colorsys" title="colorsys: Conversion functions between RGB and other color systems."><code class="xref py py-mod docutils literal notranslate"><span class="pre">colorsys</span></code></a> --- 颜色系统间的转换<a class="headerlink" href="#module-colorsys" title="永久链接至标题">¶</a></h1>
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<p><strong>源代码：</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.8/Lib/colorsys.py">Lib/colorsys.py</a></p>
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<p><a class="reference internal" href="#module-colorsys" title="colorsys: Conversion functions between RGB and other color systems."><code class="xref py py-mod docutils literal notranslate"><span class="pre">colorsys</span></code></a> 模块定义了计算机显示器所用的 RGB (Red Green Blue) 色彩空间与三种其他色彩坐标系统 YIQ, HLS (Hue Lightness Saturation) 和 HSV (Hue Saturation Value) 表示的颜色值之间的双向转换。 所有这些色彩空间的坐标都使用浮点数值来表示。 在 YIQ 空间中，Y 坐标取值为 0 和 1 之间，而 I 和 Q 坐标均可以为正数或负数。 在所有其他空间中，坐标取值均为 0 和 1 之间。</p>
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<div class="admonition seealso">
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<p class="admonition-title">参见</p>
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<p>有关色彩空间的更多信息可访问 <a class="reference external" href="http://poynton.ca/ColorFAQ.html">http://poynton.ca/ColorFAQ.html</a> 和 <a class="reference external" href="https://www.cambridgeincolour.com/tutorials/color-spaces.htm">https://www.cambridgeincolour.com/tutorials/color-spaces.htm</a>.</p>
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<p><a class="reference internal" href="#module-colorsys" title="colorsys: Conversion functions between RGB and other color systems."><code class="xref py py-mod docutils literal notranslate"><span class="pre">colorsys</span></code></a> 模块定义了如下函数：</p>
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<dl class="function">
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<dt id="colorsys.rgb_to_yiq">
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<code class="sig-prename descclassname">colorsys.</code><code class="sig-name descname">rgb_to_yiq</code><span class="sig-paren">(</span><em class="sig-param">r</em>, <em class="sig-param">g</em>, <em class="sig-param">b</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.rgb_to_yiq" title="永久链接至目标">¶</a></dt>
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<dd><p>把颜色从RGB值转为YIQ值。</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.yiq_to_rgb">
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<code class="sig-prename descclassname">colorsys.</code><code class="sig-name descname">yiq_to_rgb</code><span class="sig-paren">(</span><em class="sig-param">y</em>, <em class="sig-param">i</em>, <em class="sig-param">q</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.yiq_to_rgb" title="永久链接至目标">¶</a></dt>
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<dd><p>把颜色从YIQ值转为RGB值。</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.rgb_to_hls">
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<code class="sig-prename descclassname">colorsys.</code><code class="sig-name descname">rgb_to_hls</code><span class="sig-paren">(</span><em class="sig-param">r</em>, <em class="sig-param">g</em>, <em class="sig-param">b</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.rgb_to_hls" title="永久链接至目标">¶</a></dt>
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<dd><p>把颜色从RGB值转为HLS值。</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.hls_to_rgb">
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<code class="sig-prename descclassname">colorsys.</code><code class="sig-name descname">hls_to_rgb</code><span class="sig-paren">(</span><em class="sig-param">h</em>, <em class="sig-param">l</em>, <em class="sig-param">s</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.hls_to_rgb" title="永久链接至目标">¶</a></dt>
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<dd><p>把颜色从HLS值转为RGB值。</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.rgb_to_hsv">
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<code class="sig-prename descclassname">colorsys.</code><code class="sig-name descname">rgb_to_hsv</code><span class="sig-paren">(</span><em class="sig-param">r</em>, <em class="sig-param">g</em>, <em class="sig-param">b</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.rgb_to_hsv" title="永久链接至目标">¶</a></dt>
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<dd><p>把颜色从RGB值转为HSV值。</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.hsv_to_rgb">
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<code class="sig-prename descclassname">colorsys.</code><code class="sig-name descname">hsv_to_rgb</code><span class="sig-paren">(</span><em class="sig-param">h</em>, <em class="sig-param">s</em>, <em class="sig-param">v</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.hsv_to_rgb" title="永久链接至目标">¶</a></dt>
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<dd><p>把颜色从HSV值转为RGB值。</p>
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</dd></dl>
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<p>示例:</p>
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<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">colorsys</span>
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<span class="gp">>>> </span><span class="n">colorsys</span><span class="o">.</span><span class="n">rgb_to_hsv</span><span class="p">(</span><span class="mf">0.2</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">)</span>
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<span class="go">(0.5, 0.5, 0.4)</span>
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<span class="gp">>>> </span><span class="n">colorsys</span><span class="o">.</span><span class="n">hsv_to_rgb</span><span class="p">(</span><span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">)</span>
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<span class="go">(0.2, 0.4, 0.4)</span>
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