Here is something fun! There is artwork application up at the Apple App Store called 'Primitive'. What it does is reduce your image into geometric forms with a simple click or tap of a button. The procedure is simple: drag and drop an image you want to alter into a little box, select a geometric pattern such as a triangles, circles, rectangles, quadrilaterals, squares, quadratic Beziers etc, tap the start button and decide when you want to stop.
Included as sample images are a nude oil paint study of a woman exiting the water, a screenshot of a vocalist from a Sade concert in Germany that I yank off a YouTube video.