Learn this tutorial and see how to create half picture/half draught effect in Photoshop.
Before:

After:

Step 1
Open any picture in Photoshop.
Step 2Choose Layer > Duplicate Layer, and press ok, to duplicate your layer.
Step 3Then, choose Filter > Stylize > Find Edges. See the picture below.

Step 4Press Shift+Ctrl+U key, to remove a color from picture. See the picture below.
Step 5Press Ctrl + L key to open the Levels Panel. Then, set the options from the picture below.

Now, you get this:
Step 6In layers palette, click on Add Layer Mask icon, and after that, under foreground color set black color.
Step 7Take the Gradient Tool (G), and in Gradient Editor choose Foreground to Background.
Step 8After that, do like it is shown on the picture below:

We're done!