Structure-Preserving Stippling by Priority-based Error Diffusion

(Award: Best Student Paper (Graphics)) yes
This paper presents a new fast, automatic method for structure-aware stippling. The core idea is to concentrate on structure preservation by using a priority-based scheme that treats extreme stipples first and preferentially assign positive error to lighter stipples and negative error to darker stipples, emphasizing contrast. We also use a nonlinear spatial function to shrink or exaggerate errors and thus implicitly provide global adjustment of density. Our adjustment respects contrast and hence allows us to preserve structure even at a very low stipple budget. We also explore a variety of stylization effects, including screening and scratchboard, all within the unifying framework of stippling.

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