Composite Digital Mosaics using Duotone Tiles

Gary Greenfield
Proceedings of Bridges 2009: Mathematics, Music, Art, Architecture, Culture (2009)
Pages 155–162 Regular Papers


We describe a method for combining a foreground image and a background image to make digital mosaics using duotone tiles. Unlike the tiles of thumbnail images used in photomosaics, our duotone tiles each consist of precisely two colors. Our method uses diffusion limited aggregation (DLA) to approximate via a curve the foreground image which is then composited over a pixellated enlargement of the background image.