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To get a nice effect, the image selection is the key of success with Poster Edge. Look for strong contrast and plenty of edges detail...

Before / After

Ctrl + J and take out the eye at the background layer to make the layer invisible...

Filter ---> Poster Edges
Edge Tickness = 6
Edge Intensity = 6
Posterization = 6

With the set foreground color black(click D at the keyboard).
Select COLOR>RANGE and move the slider left and right to get the best result,. Choose white matte as the Selection Preview. When you get a good contrast Black/White click OK;
