Combining Sketch and Tone for Pencil Drawing Production

Best Paper Award

Cewu Lu     Li Xu     Jiaya Jia

The Chinese University of Hong Kong

Input Photo	Pencil Drawing	Color Pencil Drawing

Abstract

We propose a new system to produce pencil drawings from natural images. The results contain various natural strokes mimicking human styles and are structurally representative. They are accomplished by novelly combining the tonal and sketch structures, which complement each other in generating visually constrained results. Prior knowledge on pencil drawing is also incorporated, making the two basic functions robust against noise, strong texture, and significant illumination variation. In light of structure and lighting information conveyance, our pencil drawing system establishes a style that artists use to understand visual data and draw them. Meanwhile, it lets the results contain rich and well-ordered sketches to vividly express the original scene.

Results

• Gallery (Pencil Sketch)

• Gallery (Color Pencil Sketch)

• Our Pencil Skeching Results on Pulitzer Prize Photographs 1999~2011

Related Projects

• Contrast Preserving Decolorization

• L0 Image Smoothing

• L0 Deblurring

• Relative Total Variation

Downloads

"Combining Sketch and Tone for Pencil Drawing Production" Cewu Lu, Li Xu, Jiaya Jia International Symposium on Non-Photorealistic Animation and Rendering (NPAR 2012), June, 2012 [Best Paper Award]    [Paper (pdf, 15MB)]