Multi-layer pointillism

This paper presents an image-based artistic rendering algorithm for the automatic pointillism style. At first, stroke locations are randomly generated based on a target image; then stroke size and rendering order are pre-calculated by a standard deviation map of the image; at last, the rendering runs layer-by-layer from large stroke size to small stroke size so as to reserve the detailed parts of the image. Although only circle stroke is adopted, the result images look good because they not only have a pointillism style but also highlight the fine parts of the images.