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<ul class="navigation"><li class="prev"><a accesskey="p" class="prev" href="WS9C5407FF-2787-400b-9930-FF44266E9168a.html" title="调整选区边缘"><img src="images/blank.gif" alt="上一页" width="17" height="17" /></a></li><li class="next"><a accesskey="n" class="next" href="WSfd1234e1c4b69f30ea53e41001031ab64-76dea.html" title="从选区中移去边缘像素"><img src="images/blank.gif" alt="下一页" width="17" height="17" /></a></li></ul><div class="hierarchy"><a href="WSfd1234e1c4b69f30ea53e41001031ab64-7701a.html">选区和蒙版</a> /
     <a href="WSfd1234e1c4b69f30ea53e41001031ab64-76f0a.html"><b>调整像素选区</b></a> 
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                <h1>
                    柔化选区边缘
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                <br clear="both" /><div id="minitoc"><div class="t"><div class="b"><div class="l"><div class="r"><div class="bl"><div class="br"><div class="tl"><div class="tr"><div><h3>目录 [<a href="#" onclick="return toggleMiniToc('minitoc-links', this);" class="hideLink">隐藏</a>]</h3><ul id="minitoc-links"><li><p><a href="#WSfd1234e1c4b69f30ea53e41001031ab64-76e1a"><h1 class="topictitle1">使用消除锯齿功能选择像素</h1>
</a></p></li><li><p><a href="#WSfd1234e1c4b69f30ea53e41001031ab64-76e0a"><h1 class="topictitle1">为选择工具定义羽化边缘</h1>
</a></p></li><li><p><a href="#WSfd1234e1c4b69f30ea53e41001031ab64-76dfa"><h1 class="topictitle1">为现有选区定义羽化边缘</h1>
</a></p></li></ul></div></div><br clear="both" /></div></div></div></div></div></div></div></div><br clear="both" /><div><div class="section"><p>可以通过消除锯齿和通过羽化来平滑硬边缘。</p>
<dl><dt class="dlterm">消除锯齿</dt>
<dd>通过软化边缘像素与背景像素之间的颜色过渡效果，使选区的锯齿状边缘平滑。由于只有边缘像素发生变化，因此不会丢失细节。消除锯齿在剪切、拷贝和粘贴选区以创建复合图像时非常有用。<p>消除锯齿适用于套索工具、多边形套索工具、磁性套索工具、椭圆选框工具和魔棒工具。（选择工具可显示该工具的选项栏。） </p>
<div class="note"><span class="notetitle">注：  </span>使用这些工具之前必须指定该选项。建立了选区后，您无法添加消除锯齿功能。</div>
</dd><p class="dlseparator"></p><dt class="dlterm">羽化</dt>
<dd>通过建立选区和选区周围像素之间的转换边界来模糊边缘。该模糊边缘将丢失选区边缘的一些细节。<p>可以在使用工具时为选框工具、套索工具、多边形套索工具或磁性套索工具定义羽化，也可以向现有的选区中添加羽化。 </p>
<div class="note"><span class="notetitle">注：  </span>仅在移动、剪切、拷贝或填充选区后，羽化效果很明显。</div>
</dd><p class="dlseparator"></p></dl>
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<div id="WSfd1234e1c4b69f30ea53e41001031ab64-76e1a" class="nochunk"><a name="WSfd1234e1c4b69f30ea53e41001031ab64-76e1a"></a><h3 class="topictitle3">使用消除锯齿功能选择像素</h3><div><ol><li><span>选择套索工具、多边形套索工具、磁性套索工具、椭圆选框工具或魔棒工具。</span></li>
<li><span>在选项栏中选择“消除锯齿”选项。</span></li>
</ol>
</div></div>
<div id="WSfd1234e1c4b69f30ea53e41001031ab64-76e0a" class="nochunk"><a name="WSfd1234e1c4b69f30ea53e41001031ab64-76e0a"></a><h3 class="topictitle3">为选择工具定义羽化边缘</h3><div><ol><li><span>选择任一套索或选框工具。</span></li>
<li><span>在选项栏中输入“羽化”值。此值定义羽化边缘的宽度，范围可以是 0 到 250 像素。 </span></li>
</ol>
</div></div>
<div id="WSfd1234e1c4b69f30ea53e41001031ab64-76dfa" class="nochunk"><a name="WSfd1234e1c4b69f30ea53e41001031ab64-76dfa"></a><h3 class="topictitle3">为现有选区定义羽化边缘</h3><div><ol><li class="stepexpand"><span>选择“选择”&gt;“修改”&gt;“羽化”。</span></li>
<li class="stepexpand"><span>输入“羽化半径”的值，然后单击“确定”。 </span> <div class="note"><span class="notetitle">注：  </span>如果选区小而羽化半径大，则小选区可能变得非常模糊，以致于看不到并因此不可选。如果看到“选中的像素不超过 50%”信息，请减少羽化半径或增大选区的大小。或单击“确定”以接受采用当前设置的蒙版，并创建无法看到其边缘的选区。</div>
<div class="fignone"><img alt="" id="se_08" src="images/se_08.png" /><div class="figdesc">不带羽化和带羽化的选区。 </div><br /><dl><dt class="dlterm">A.</dt>
<dd>不带羽化的选区，使用图案填充的同一个选区</dd><p class="dlseparator"></p><dt class="dlterm">B.</dt>
<dd>带有羽化的选区，使用图案填充的同一个选区</dd><p class="dlseparator"></p></dl>
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