ps怎么抠出一条完整的瀑布? ps瀑布抠图教程
<p>ps中抠图很厉害，想要将一条瀑布完整的抠出来，该怎么抠图呢？首先我们来看看最终效果，详细步骤如下文所述。</p><p><div class="arc_down"><img src="https://img.jbzj.com/do/uploads/litimg/130416/16061464391.jpg"><p class="arc_down_title">Adobe Photoshop 8.0 中文完整绿色版</p><ul><li><span>类型：</span>图像处理</li><li><span>大小：</span>150.1MB</li><li><span>语言：</span>简体中文</li><li><span>时间：</span>2015-11-04</li></ul>查看详情</div></p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475317.jpg" /></p>
<p>原图</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475318.jpg" /></p>
<p>1、观察通道。打开原图素材，进入<span style="color: #ff0000"><strong>通道面板</strong></span>，分析一下各通道。</p>
<p><strong>红通道</strong>：瀑布颜色较亮，背景颜色较暗，对比极强，比较理想。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475320.jpg" /></p>
<p><strong>绿通道：</strong>瀑布颜色较亮，背景颜色比较亮，同时比较杂乱，不是很理想。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475321.jpg" /></p>
<p><strong>蓝通道：</strong>瀑布颜色较亮，背景也比较杂乱，不是很理想。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475322.jpg" /></p>
<p>2、选择红通道，<strong>按Ctrl + A 全选，按Ctrl + C 复制，</strong>点RGB通道返回图层面板，新建一个图层，按Ctrl + V 把复制的红通道粘贴进来，如下图。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475323.jpg" /></p>
<p>3、点图层下面的创建新的填充或调整图层按钮，选择“<span style="color: #ff0000"><strong>色阶</strong></span>”。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475324.jpg" /></p>
<p>4、设置色阶参数，把暗部稍微压暗一点，参数及效果如下图。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475325.jpg" /></p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475326.jpg" /></p>
<p>5、新建一个空白图层，把前景色设置为黑色，选择<span style="color: #ff0000"><strong>画笔工具</strong></span>，画笔不透明度设置为100%，如下图。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201707/2017072808475327.jpg" /></p>
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