A voronoi filter for images, available for Linux in C (needs porting for osx) or a platform independent version in python.
Fast version (in C)
sudo apt-get install libmagickwand-dev
I've included a version of libkdtree.a which works on i386 architectures. You may need to compile your own from the source here.
###Syntax `$./vor -s source_name -d destination-name [-n num_cells|-r random_seed| -c min_diff]
-s source_name: name of file you want to voronoify. default is lisa.png
-d destination_name: what to save the file as. Default is $num_cells-$source_name
-n num_cells: number of voronoi cells. Default is 500
-r random_seed: Optional. If unspecified, a seed will be taken from /dev/random. -c min_diff: compress: doesn't add nodes with less than $min_diff color difference. In images with a lot of uniform space, this can save a lot of time by not filling up the tree with nodes of the same color. I think a good setting is 100.
###Note: Probably needs tweaking for windows, though works fine on Ubuntu 12.04 and 12.10.
Platform independent version (Python)
both can be acquired through pip.
from import python_vor import generate_voronoi
from PIL import Image
Then create an image object with
source = Image.open(source_filename)