Coherent Line Drawing

Henry Kang
University of Missouri, St. Louis

Seungyong Lee

Charles K. Chui
University of Missouri, St. Louis

In Proc. of the 5th Intl' Symposium on Non-Photorealistic Animation and Rendering, August 2007.


This paper presents a non-photorealistic rendering technique that automatically generates a line drawing from a photograph. We aim at extracting a set of coherent, smooth, and stylistic lines that effectively capture and convey important shapes in the image. We first develop a novel method for constructing a smooth direction field that preserves the flow of the salient image features. We then introduce the notion of flow-guided anisotropic filtering for detecting highly coherent lines while suppressing noise. Our method is simple and easy to implement. A variety of experimental results are presented to show the effectiveness of our method in producing self-contained, high-quality line illustrations.

PDF, 4.28MB


author = "Henry Kang and Seungyong Lee and Charles K. Chui",
title = "Coherent Line Drawing",
booktitle = "ACM Symposium on Non-Photorealistic Animation and Rendering (NPAR)",
pages = {43-50},
month = aug,
year = "2007"