Stippling Pattern 2 (Voronoi Iteration)

This stippling pattern is based on Voronoi iteration to reposition the original point location.

The method in generating pattern has a similar principle with the Pattern Stippling 1.  However, the algorithm calculation will be based on voronoi cell to calculate the intensity/brightness of the image. The pattern result produced by this pattern is not only depend on the parameter that has been chosen, but also depend on the image itself.