I would recommend Microsoft Picture It Digital Image Pro 7.0 Image.
It has a wide selection of image filters that can be used to break down images into very basic geometric patterns, shapes, and designs for various artistic projects.
Furthermore, it does not require a high computer graphic skill level to operate.
It is available on Amazon.com for Approx $40 USD.
http://www.amazon.com/Picture-Digita.../dp/B0000696IT
Best of luck.