Communication Dans Un Congrès Année : 2025

PerceptualLift: Using hatches to infer a 3D organic shape from a sketch

Résumé

In this work, we investigate whether artistic hatching, popular in pen-and-ink sketches, can be consistently perceived as a depth cue. We illustrate our results by presenting PerceptualLift, a modeling system that exploits hatching to create curved 3D shapes from a single sketch. We first describe a perceptual user study conducted across a diverse group of participants, which confirms the relevance of hatches as consistent clues for inferring curvature in the depth direction from a sketch. It enables us to extract geometrical rules that link 2D hatch characteristics, such as their direction, frequency, and magnitude, to the changes of depth in the depicted 3D shape. Built on these rules, we introduce PerceptualLift, a flexible tool to model 3D organic shapes by simply hatching over 2D hand-drawn contour sketches.

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hal-05091483 , version 1 (31-05-2025)

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Tara Butler, Pascal Guehl, Amal Dev Parakkat, Marie-Paule Cani. PerceptualLift: Using hatches to infer a 3D organic shape from a sketch. Expressive + WICED 2025, May 2025, London, United Kingdom. ⟨10.2312/exw.20251055⟩. ⟨hal-05091483⟩
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