3 Color Popart Photo Effect
Start with a photo of a person of your choice.
Duplicate the photo's layer. Avtivate the top layer.
Go to Image --> Adjustments --> Threshold and use the slider to get a contrast like shown below.
Click Select --> Color Range..
Select the black color and then click Edit --> Fill. Pick a nice color (I used a light green)
It should look something like this now:
Looks kinda popart already..
Now take the original unaltered photo layer and drag it to the top of the layer palette.
Set the Layer to Multiply.
Go to Image --> Adjustments --> Threshold again and use the slider until you get something like this:
Almost done. You may want to use Filter --> Artistic --> Cutout or Filter --> Artistic --> Paint Daubs to get smoother edges.
Cutout:
Paint Daubs:
There's your 3 Color Popart Effect.