The idea is to position different size brush strokes on an image to try and produce a kind of painting. The main idea is that the brush strokes are randomly (hence the monkeys...) positioned on the resulting image but are only kept if they produce a result closer to the original. Therefore if you run the filter long enough, with smaller and more precise brush strokes you should hopefully get a pleasing image. Well that's the theory anyway...
Here is an early example (just click on the picture to view full size), based on a photo of the city of Porto Venere (credits Stock.xchng):
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjLldJxdSQ-oO_J_h8_qlheRoMtGadKS6p3zbnkmWSa3Pt5GUjqCOjEaST1gEBozClKW2lN7rCaHRrHZvmswiSRrwx7PbETuDgzHhWGkY1eLSsIdZ2vHQrUaCs2Gx_ZW3KIAfcCdO37kWVB/s400/FotoSketcher+-+Porto+Venere.jpg)
The algorithm still needs a lot of tweaking, but I hope you'll like it.
Cheers,
David