Let's say you want to cut it out of metal (perhaps with the plasma cutter at TechShop) or out of wood or cardboard (maybe on the laser cutter) or on a tshirt (vinyl cutter) or even carve it into a pumpkin! You'll need to convert that photo a black and white image that can be fed to one of these machines. Or you can print it on a transparency using a regular ink-jet printer and then shine light through it. Project it on a wall and paint it, or onto a pumpkin.
Before you can do any of these things you need to transform your photo from a thing with 32000 colors to something with only 2.
I'm not going to go into much detail about how to cut it out. This instructable is all about how use the software available at any computer in Techshop (and other places) to create the cutout. I spent several hours last night figuring out the exact steps; it should take you about 20 minutes to follow these steps!
I made it at Techshop! www.techshop.ws
Step 1: Open Your Image In Photoshop
I chose to use a very recognizable face that I picked up on the internet.
This is instructable has kind of a lot of steps so here's an overview:
Steps 1-6 shows you how to get a cut out image in photoshop.
Step 7 is really just a demonstration of how your choices affect the outcome
Steps 8-11 shows you how to get it into the coreldraw and convert it to use a CNC tool.
Step 12 discusses how to set it up for a few of the specific CNC tools I know about.