Pixelated Portrait Effect
In this quick tutorial you'll learn how to add a subtle and stylish pixelated effect to portrait photographs.
The portrait photo I've used for this tutorial was provided by deviantART member Mo-01, and can be downloaded here.
With your photo open in Photoshop, first duplicate it's layer by dragging it to the new layer button at the bottom of the layer's panel.
Select the copied layer and go to Filter>Pixelate>Mosaic.
The Cell Size you use will depend on the size of your photo, for this one I've used 25.
Next give the layer a layer mask by clicking on the layer mask button.
Select the Gradient Tool and use a black to white Linear Gradient.
With the layer mask thumbnail selected, draw the gradient horizontally across a small part of the front of the face, or wherever you want the pixels to begin.
Finally set the Layer's blending mode to Hard Light, and take it's Opacity down to 70%.
Here's the final result.