ps怎么从白色背景中快速抠出小白兔?
<p>素材图片中兔子整体比较亮，局部基本跟背景色融合；同时阴影区域又比较暗；抠图的时候，可以先把偏暗的区域调亮一点，然后增加整体明暗对比；最后用通道和蒙版就可以快速抠出兔子。</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 style="text-align: center">最终效果</p>
<p style="text-align: center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750115.jpg" /></p>
<p style="text-align: center">原图</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750116.jpg" /></p>
<p>1、打开原图素材大图，按Ctrl + J 把背景图层复制一层，并按<span style="color: #ff0000"><strong>Ctrl + Shift + U </strong></span><strong>去色</strong>，如下图。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750117.jpg" /></p>
<p>2、兔子底部区域比较暗，需要先调亮一点。选择<strong>套索工具，</strong>勾出右脚底部阴影区域，并羽化3个像素。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750118.jpg" /></p>
<p>3、创建色阶调整图层，稍微调亮一点，参数及效果如下图。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750119.jpg" /></p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750120.jpg" /></p>
<p>4、用<strong>套索</strong>勾出左脚内侧选区，如下图，并羽化3个像素。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750121.jpg" /></p>
<p>5、创建<strong>色阶调整图层，</strong>调亮一点，参数及效果如下图。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750122.jpg" /></p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750123.jpg" /></p>
<p>6、用<span style="color: #ff0000"><strong>套索工具</strong></span>勾出底部中间区域选区，如下图，并羽化3个像素。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750124.jpg" /></p>
<p>7、创建色阶调整图层，同样调亮一点，参数及效果如下图。</p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750125.jpg" /></p>
<p align="center"><img alt="" src="https://img.jbzj.com/file_images/photoshop/201706/20170622092750126.jpg" /></p>
<p>
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