saliences.com : Weighted Voronoi Stippling

Stippling is the creation of a pattern simulating shading by using small dots. Such a pattern may occur in nature and these effects are frequency emulated by artists^[1]. Adrian Secord first outlined a method of algorithmically generating the stippling pattern in his 2002 NPAR paper entitled “Weighted Voronoi Stippling”. The application presented below is an independent implementation of the ideas of the NPAR paper. This was originally done as a university assignment for Professor Craig S. Kaplan, but has since been fine tined, sped up, corrected, and generally speaking changed beyond recognition. For a more technical take on this tool, please refer to the technical whitepaper.

Downloads

• The program is open-source and the source code is available on GitHub.
• Windows Executable (4.2 MB). Requires Microsoft Visual C++ 2010 SP1 Runtime Library.
• A MAKEFILE is available in the GitHub repository which can be used to build binaries for Linux and Mac OS X.

Documentation

Full documentation for the command line arguments are available here.

Image Gallery

Style: Original 8000 Stipples 16000 Stipples Fixed Radius

Klaymen

“Klaymen” by ~LuigiL

This image has multiple tones as a result of the interplay between the shadows and hilights on the character’s body.

Style: Original Coloured Stipples

Vase

Style: Original 14000 Stipples 28000 Stipples

Fairy Eyes

A “Black and White” image with varying tone values and sharp details in some areas (the woman’s hair).

Note how the tonal changes in the woman’s hair have been captured by the algorithm.

With 28000 stipples the high amount of detail in the woman’s hair has been captured almost completely.