最终效果图

Open the necessary girl photo: File -Open (ctrl+o)

1、打开一张MM跳舞的照片～(文件-打开ctrl+o)

Mark it out along the contour, using Polygonal Lasso Tool

2、使用多边形套索工具将MM抠出来。

Cut out the part inside the marked place: Edit -Cut (ctrl+x) and place it on a new layer: Edit -Paste (ctrl+v). Delete the previous layer and the photo rests with the fast button on the Layers window. Use the following command Image -Abjustments -Curves (ctrl+m) to make the layer look lighter.

3、将抠出来的MM帖到一个新的图层中，原来的图片删掉。调整一下亮度吧(图像-调整-曲线ctrl+m)。