Digital Pixel Effect using Photoshop

Step:1

Open the Photo document in Photoshop.Make a duplicate layer by Pressing ctrl+j

Step:2

In the duplicate layer go to Filter -> Pixelate -> Mosaic and change the cell size to 18. Cell size can be varied depend upon our needs.

Step:3

Add a later mask in the duplicate layer.Then apply the gradient mask  from left to right using black as foreground color and white as background layer.

Step:4

Apply white color on Layer mask. Using brush remove some of the Face parts like eyes, nose, head.Make black as foreground color.

Step:5

Reduce the Opacity to 75%. Change the Blending modes from normal to darken. You can change the blending modes according to your needs.