Region-Based Abstraction

Region-based stylization provides algorithms for traditional media types, including woodcuts, stencils, and stained glass, as well as image abstraction, that may not correspond to any historical style or medium. In region-based stylization, the primitives are two-dimensional areas of the image plane, possibly populated with conventional primitives such as strokes in a secondary stage. The archetypal region-based stylization method involves an initial segmentation of the image, with subsequent assignment of colors to the region, filling the regions with strokes, if applicable, and possibly stylization of the region shapes. Region-based stylization techniques are characterized by their preservation of and attention to the region boundaries, which may be the exaggerated, smoothed, or otherwise modified results of an initial automatic or semi-automatic segmentation pass.