Interactive pen-and-ink illustration
SIGGRAPH '94 Proceedings of the 21st annual conference on Computer graphics and interactive techniques
Orientable textures for image-based pen-and-ink illustration
Proceedings of the 24th annual conference on Computer graphics and interactive techniques
Proceedings of the 28th annual conference on Computer graphics and interactive techniques
Fast primitive distribution for illustration
EGRW '02 Proceedings of the 13th Eurographics workshop on Rendering
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Non-photorealistic rendering often requires placing drawing primitives onto a 2D canvas in such a way that the resulting tone approximates that of a greyscale reference image. Several iterative methods have been used where each stroke is tentatively placed on the canvas and the resulting tone is evaluated with respect to the reference image. [Salisbury et al. 1994; Salisbury et al. 1997; Praun et al. 2001] If the stroke over-darkens the output image it is rejected, otherwise it is accepted. While this back-and-forth iteration between the output and the reference image is capable of producing high-quality results, it is extremely costly in terms of computation and memory references.