<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html
  PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!--#config errmsg="" --><!-- saved from url=(0022)http://help.adobe.com/ -->
<html lang="zh-cn">
    <head>
        <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
        <meta name="lang" content="zh-cn" />
        <meta name="area" content="livedocs" />
        <title>Photoshop CS4 * 创建和编辑 Alpha 通道蒙版</title>
        <meta name="product" content="$product" />
        <meta name="keywords" content="" />
        <script type="text/javascript" language="Javascript" charset="UTF-8"><!--[CDATA[
        var currentTreeNode = "WSfd1234e1c4b69f30ea53e41001031ab64-76c3a.html";
// ]]--></script>
<script src="terms.js" type="text/javascript" language="Javascript" charset="UTF-8">...</script> <script src="help.js" type="text/javascript" language="Javascript" charset="UTF-8">...</script>  <script src="utilities.js" type="text/javascript" language="Javascript" charset="UTF-8">...</script> <script src="event.js" type="text/javascript" language="Javascript" charset="UTF-8">...</script> <script src="treeview.js" type="text/javascript" language="Javascript" charset="UTF-8">...</script> <script src="toc.js" language="Javascript" type="text/javascript" charset="UTF-8">..</script> 
<script type="text/javascript">
<!--[CDATA[
var headId = document.getElementsByTagName("head")[0];         
if (use_ie_6_behavior) {
    var linkId = document.createElement("link");
    linkId.href = "content-ie6.css";
    linkId.rel = "stylesheet";
    linkId.type = "text/css";
    headId.appendChild(linkId);
}
// ]]-->
</script>
<!--#include virtual="/livedocs/ssi/globalheader.ssi" -->
        <link rel="stylesheet" type="text/css" href="tree.css" />
        <link rel="stylesheet" type="text/css" href="content-fonts.css" />
        <link rel="stylesheet" type="text/css" href="content-hyperlinks.css" />
        <link rel="stylesheet" type="text/css" href="content.css" />
        <link rel="stylesheet" type="text/css" href="localeSpecific.css" />
    </head>
    <body id="content_body" onload="window.focus();">
        <a name="top"></a><div id="mnemonic">
            <div class="Photoshop"><table><tr><td class="banner">Photoshop CS4</td><td class="pod"><img src="images/PDF.gif" width="16" height="16" hspace="15" valign="50%" />&#160;&#160;
                     <a title="PDF" href="http://help.adobe.com/zh_CN/Photoshop/11.0/photoshop_cs4_help.pdf">
                         PDF (adobe.com) 
                    </a></td></tr></table></div>
        </div>
        <div id="searchbar">
<!-- BEGIN SEARCH CONTENT -->
            <form class="search_form" id="search" name="search" action="search.html" target="_self">
                <img src="images/search.png" />
<script type="text/javascript">
<!--[CDATA[
function clearSearch(){
    if (document.search.q.value == terms_AHV_SEARCH_BUTTON){document.search.q.value = ""}; 
}
document.write('<input class=\"search_input\" \
        name=\"q\" \
        id=\"q\" \
        type=\"text\" \
        maxlength=\"256\" \
        value=\"' + terms_AHV_SEARCH_BUTTON + '\" onclick=\"clearSearch()\"><\/input>'); 
// ]]-->


</script> 
            </form>
        </div>
<!-- BEGIN PAGE CONTENT WRAPPER -->
        <div id="page_content_wrapper">
<!-- BEGIN PAGE WRAPPER -->
<table id="page_content_table">
<tr>
<td id="col1">
<!-- BEGIN IONCOMMENTCOUNT -->
            <div id="ionComCount">
            </div>
<!-- END IONCOMMENTCOUNT -->
<!-- BEGIN GROUP TOC WRAPPER -->
            
<!-- END GROUP TOC WRAPPER -->
<!-- BEGIN NAV WRAPPER -->
            <div id="group_toc">
<script type="text/javascript">
<!--[CDATA[
if ( typeof(terms_BOOK_SHORT) != 'undefined' ) {
  document.write("<p>" + terms_BOOK_SHORT + "<\/p>");
}
// ]]-->


</script> 
            </div>
            <div id="nav_content">
            </div>
<!-- END NAV WRAPPER -->
</td>
<td id="col2">
<!-- BEGIN CONTENT WRAPPER -->
<!-- BEGIN BREADCRUMBS -->
            
            <div id="breadcrumb">
                
<ul class="navigation"><li class="prev"><a accesskey="p" class="prev" href="WSfd1234e1c4b69f30ea53e41001031ab64-76c0a.html" title="更改快速蒙版选项"><img src="images/blank.gif" alt="上一页" width="17" height="17" /></a></li><li class="next"><a accesskey="n" class="next" href="WSBB7A7447-383C-40e3-971F-88F5AB2DCB6Aa.html" title="存储和载入选区"><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="WSfd1234e1c4b69f30ea53e41001031ab64-76c3a.html"><b>存储选区和使用蒙版</b></a> 
     </div>

            </div>
<!-- END BREADCRUMBS -->
            <div id="content_wrapper">
<!-- BEGIN PAGE TITLE -->
                <h1>
                    创建和编辑 Alpha 通道蒙版
                </h1>
<!-- END PAGE TITLE -->
                <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="#WSED7384A3-1A8B-45ab-AEEE-A181B7096CF1a"><h1 class="topictitle1">使用当前选项创建 Alpha 通道蒙版</h1>
</a></p></li><li><p><a href="#WSEF7AFDE6-795A-4cfb-A5D7-4774A674DE72a"><h1 class="topictitle1">创建 Alpha 通道蒙版并设置选项</h1>
</a></p></li><li><p><a href="#WS4D9165F3-B038-464f-A4E3-D9C28FE91A9Da"><h1 class="topictitle1">通道选项</h1>
</a></p></li><li><p><a href="#WS7AEB7E08-B6A8-4043-BDCE-3CDE21D17063a"><h1 class="topictitle1">在通道上绘画以蒙版图像区域</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>可以创建一个新的 Alpha 通道，然后使用绘画工具、编辑工具和滤镜通过该 Alpha 通道创建蒙版。也可以将 Photoshop 内的现有选区存储为 Alpha 通道，该通道将出现在“通道”面板中。请参阅<a href="WSBB7A7447-383C-40e3-971F-88F5AB2DCB6Aa.html">存储和载入选区</a>。</p>
</div>
</div>
<div id="WSED7384A3-1A8B-45ab-AEEE-A181B7096CF1a" class="nochunk"><a name="WSED7384A3-1A8B-45ab-AEEE-A181B7096CF1a"></a><h3 class="topictitle3">使用当前选项创建 Alpha 通道蒙版</h3><div><ol><li class="stepexpand"><span>单击“通道”面板底部的“新建通道”按钮 <img src="images/P_New_Wi_N.png" />。</span></li>
<li class="stepexpand"><span>在新通道上绘画以蒙版图像区域。</span> <div class="tip"><img src="images/tip_help.png" />在为蒙版创建通道之前，请选择图像的区域。然后在通道上绘画以调整蒙版。</div></li>
</ol>
</div></div>
<div id="WSEF7AFDE6-795A-4cfb-A5D7-4774A674DE72a" class="nochunk"><a name="WSEF7AFDE6-795A-4cfb-A5D7-4774A674DE72a"></a><h3 class="topictitle3">创建 Alpha 通道蒙版并设置选项</h3><div><ol><li><span>按住 Alt 键 (Windows) 或 Option 键 (Mac OS) 并单击“通道”面板底部的“新建通道”按钮，或从“通道”面板菜单中选取“新建通道”。</span></li>
<li><span>在“新建通道”对话框中指定选项。</span></li>
<li><span>在新通道上绘画以蒙版图像区域。</span></li>
</ol>
</div></div>
<div id="WS4D9165F3-B038-464f-A4E3-D9C28FE91A9Da" class="nochunk"><a name="WS4D9165F3-B038-464f-A4E3-D9C28FE91A9Da"></a><h3 class="topictitle3">通道选项</h3><div><div class="section"><p>要更改现有通道的选项，请在“通道”面板中双击通道缩览图，或者从“通道”面板菜单中选择“通道选项”。 </p>
<p>这些选项在“新建通道”和“通道选项”对话框中可用：</p>
<dl><dt class="dlterm">被蒙版区域</dt>
<dd>将被蒙版区域设置为黑色（不透明），并将所选区域设置为白色（透明）。用黑色绘画可扩大被蒙版区域；用白色绘画可扩大选中区域。选定此选项后，工具箱中的“快速蒙版”按钮将变为一个带有灰色背景的白圆圈 <img src="images/P_QuickMaskMode_Lg_N.png" />。</dd><p class="dlseparator"></p><dt class="dlterm">所选区域</dt>
<dd>将被蒙版区域设置为白色（透明），并将所选区域设置为黑色（不透明）。用白色绘画可扩大被蒙版区域；用黑色绘画可扩大选中区域。选定此选项后，工具箱中的“快速蒙版”按钮将变为一个带有白色背景的灰圆圈 <img src="images/P_QuickMaskInvMode_Lg_N.png" />。</dd><p class="dlseparator"></p><dt class="dlterm">专色</dt>
<dd>将 Alpha 通道转换为专色通道。仅适用于现有通道。</dd><p class="dlseparator"></p><dt class="dlterm">颜色</dt>
<dd>设置蒙版的颜色和不透明度。单击色域以更改此颜色。颜色和不透明度设置都只是影响蒙版的外观，对如何保护蒙版下面的区域没有影响。更改这些设置能使蒙版与图像中的颜色对比更加鲜明，从而具有更好的可见性。</dd><p class="dlseparator"></p></dl>
</div>
</div></div>
<div id="WS7AEB7E08-B6A8-4043-BDCE-3CDE21D17063a" class="nochunk"><a name="WS7AEB7E08-B6A8-4043-BDCE-3CDE21D17063a"></a><h3 class="topictitle3">在通道上绘画以蒙版图像区域</h3><div><div class="section"><p>当新通道出现在“通道”面板底部时，它是图像窗口中唯一的可见通道。单击表示复合颜色通道（RGB 和 CMYK）的眼睛图标 <img src="images/P_Visibility_Sm_N.png" /> 可显示带有显示蒙版的颜色叠加的图像。</p>
</div>
<div class="p"><span><img src="images/dingbat.png" />&#160;选择画笔或编辑工具，然后执行下列操作之一，以便在从 Alpha 通道创建的蒙版中添加或减去区域： </span><ul><li><p>要移去新通道中的区域，请用白色绘画。</p>
</li>
<li><p>要在新通道中添加区域，请用黑色绘画。</p>
</li>
<li><p>要使用小于 100% 的不透明度添加或移去区域，请在“绘画”或“编辑”工具的选项栏中设置“不透明度”，然后使用白色或黑色绘画。也可以使用某个颜色绘画以获得更低的不透明度。</p>
</li>
</ul>
</div>
</div></div>

                <div id="related">
                    <div class="separator">&#160;</div>
                    <div><p><a href="WS918A2941-1476-4b6c-A98C-AE21BCDD4889a.html">关于通道</a></p>
</div>
                    
                </div>
                <div id="footer">
                    <p><img src="images/Community.png" />&#160;<a title="社区帮助 (adobe.com)" href="http://www.adobe.com/go/lr_Photoshop_community_cn">社区帮助 (adobe.com)</a></p>
<!-- BEGIN IONCOMMENTS -->
                    <div id="ionComHere">
                    </div>
<!-- END IONCOMMENTS -->
<!--#include virtual="ionComments.ssi" -->
                    <p id="creativecommons"><a href="http://creativecommons.org/licenses/by-nc-sa/3.0/" id="creativecommons_text"><img id="creativecommons_img" src="images/CC.png" alt="本产品经 Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License 许可" /></a></p>
                </div>
            </div>
<!-- END CONTENT WRAPPER -->
</td>
</tr>
</table>
        </div>
<!-- END PAGE CONTENT WRAPPER -->
<script type="text/javascript">
<!--[CDATA[
scrollToNameAnchor();
// ]]-->
</script> 
<!--#include virtual="/livedocs/ssi/globalfooter.ssi" -->
<!--#include virtual="/ubi/analytics/analytics_ssi.html" -->
    </body>
</html>