Select Filter>Brush Strokes>Spatter (Spray Radius: 15;
Smoothness: 10). Your text should now look something like the one
shown at the top right.
Before using the Stamp Filter, you need to make sure that black as
the foreground color and white is the background color. The
Stamp Filter will apply these colors for it's effect. You can reset
the foreground and background colors by selecting 'D' on your keyboard.
Now that the colors are set, you are ready to run the Stamp
filter. Choose Filter>Sketch>Stamp (Light/Dark Balance: 25;
Smoothness: 15). You should now have an image that looks like the
one shown bottom right.