Another cute blanket project!
Crochet a blanket of the cutest mini horse in the world, Starkey! (Or use these instructions to make your own photo to blanket project)!
Crop it! Then pixelate the ever loving heck out of it! If you have a stitch creator program, such as one for cross stitch you can get a cool graph with lines every 5 to 10 stitches, that makes it a little easier to work with.
Some pictures need a little editing, but this one is pretty cut and dry.
I suggest printing out your graph. Sometimes it's easier to print out the graph in sections, on 4 to 6 pieces of paper, then tape them together. (The graph in this picture is one I made for a Neil Gaiman/Amanda Palmer blanket. It was HUGE!)
Next, just match 4 different colors of yarn to your graph, usually a black, white, light grey, and dark grey. With a size G crochet hook, start single crocheting, matching each thread color to your graph! When you come to a color change, clip the current color, leaving a two inch tail, then tie the tail to your new color with a square knot. Easy as pie! (Helpful hint, cross off each row with a pencil as you go. You do NOT want to have to pull rows out. It makes you cry)
Every few rows, pull all your color changes through to the wrong side of your blanket.