Creating an outline

Through the use of Adobe Illustrator you can digitally create an outline, the use of 'live trace' allows you to take control of the amount or lack of detail shown within the image. It primarily removes the fill and unnessecary elements of the image, and highlights the darker and more defining lines.

Below is the above image, when using live trace with a threshold of 63. You can see the difference between that image, and the image below which has been used with a threshold of 178. Much more of the detail has been lost, making the image almost unrecognisable.

The live trace tool converts the image from being a Bitmap to a Vector image, this means it no longer relys on pixels as a setup, it is now made up  from mathematical formulas allowing for the image to be resized and editing without compromising the quality of the image.