Depends what programme you are using. I use Photoshop 5.5 usually. Get four copies of the face pic.
1) Open image.
2) Go to Image, Adjust, Colour Balance, and play with the settings in there to achieve something you like.
3) Save that image as imageA, or whatever.
4) Repeat three times, images B, C, and D.
5) Paste each of the images into one larger background, one to each quarter.
You might also want to try Filter, Sketch, Reticulation on one or two.