Basically, I take the image, scan it into the computer, then resize it to how ever many stitches wide I need (ex: 125 pixels wide = 125 stitches wide) Then I opened up a new layer and redrew the picture pixel by pixel in two tones (trust me, the resize looks pretty awful by itself, and you get a lot more control this way) I used to do some pixel art, so I'm used to working that small. Then you size it back up to however big you want to print it (make sure it's not being resampled though, you want to keep all those sharp edges) and make a grid over top of it so you can count each block.
I'm using photoshope, but I'm sure something else could be used
I'm just a simple little knitter. Is there a site where I could use a scanned picture and get a pixelated image? I have very little, if any, artistic ability.
By the way, your talents amaze me.