Vectorization of Line Drawings via PolyVector Fields

TL;DR

This paper introduces a novel vectorization method for line drawings that improves junction disambiguation using advanced mathematical algorithms, enhancing the accuracy and usability of automatic vectorization tools.

Contribution

The paper presents a new vectorization approach based on polyvector fields that specifically addresses junction disambiguation in line drawings.

Findings

Improved junction accuracy in vectorized line drawings

Enhanced fidelity of the resulting vector graphics

Better usability for artists and engineers

Abstract

Image tracing is a foundational component of the workflow in graphic design, engineering, and computer animation, linking hand-drawn concept images to collections of smooth curves needed for geometry processing and editing. Even for clean line drawings, modern algorithms often fail to faithfully vectorize junctions, or points at which curves meet; this produces vector drawings with incorrect connectivity. This subtle issue undermines the practical application of vectorization tools and accounts for hesitance among artists and engineers to use automatic vectorization software. To address this issue, we propose a novel image vectorization method based on state-of-the-art mathematical algorithms for frame field processing. Our algorithm is tailored specifically to disambiguate junctions without sacrificing quality.