How Do I Make An Outline from Pic?

This might seem like a strange question, but is there a way for me to take a picture of someone's face in photoshop and delete everything to where there is just the main outline of the hair, shape of eyes, face..etc?..just a black outline.

Is this even possible without getting too complicated? I've messed around a little bit with it and have had no success.

If anyone can help me with this, I'd appreciate it!

Thanks in advance.

See my PS: Simple Sketch from Phot Tip thread.

That should help.

I did not even see that thread..Thanks a million!