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PaintCan is available for free on iOS! Download it today.

With PaintCan you can create beautiful paintings from your favorite photographs within minutes.

PaintCan is a fun, easy way to paint great looking artwork from your photographs. It is based on my "Painting with Bob" research (see below). Visit our webpage to learn more.

2018

DepthCut: Improved Depth Edges Estimation using Multiple Unreliable Channels
Paul Guerrero, Holger Winnemöller, Wilmot Li, Niloy J. Mitra
The Visual Computer 34(9), 2018.
Abstract | PDF | WWW | Suppl. Material
Charrette: Supporting In-Person Discussions around Iterations in User Interface Design
Jasper O'Leary, Holger Winnemöller, Wilmot Li, Mira Dontcheva, Morgan Dixon
Proceedings of CHI'18, 2018.
Abstract | PDF | WWW | Video

2017

Conference Chair Proceedings of Expressive'17 (NPAR, CAe, SBIM)
Lyn Bartram, Holger Winnemöller
Proceedings of Expressive'17, 2017.
Abstract | WWW Conference | NPR Proceedings | SBIM Proceedings | CAe Proceedings
Benchmarking Non-photorealistic Rendering of Portraits
Paul L. Rosin, David Mould, Itamar Berger, John P. Collomosse, Yu-Kun Lai, Chuan Li, Hua Li, Ariel Shamir, Michael Wand, Tinghuai Wang, Holger Winnemöller
Proceedings of NPAR, 2017.
Abstract | PDF | WWW
Interactive Vectorization
Jun Xie, Holger Winnemöller, Wilmot Li, Stephen Schiller
Proceedings of CHI'17 (Honorable Mention), 2017.
Abstract | PDF | WWW | Suppl. Material | Video
How2Sketch: Generating Easy-To-Follow Tutorials for Sketching 3D Objects
James W. Hennessey, Han Liu, Holger Winnemöller, Mira Dontcheva, Niloy J. Mitra
Symposium on Interactive 3D Graphics and Games (I3D): Article No. 8 , 2017.
Abstract | PDF | WWW | Official Video | 2 min papers (3rd party video) | BIB

2016

DiscoverySpace: Suggesting Actions in Complex Software
C. Ailie Fraser, Mira Dontcheva, Holger Winnemöller, Sheryl Ehrlich, Scott R. Klemmer
Conference on Designing Interactive Systems: 1221-1232, 2016.
Abstract | PDF | CSCW'16 DEMO | BIB

2014

WYSIWYG Stereo Paintingwith Usability Enhancements
Yongjin Kim, Holger Winnemöller, Seungyong Lee
IEEE Trans. Vis. Comput. Graph. 20(7): 957-969, 2014.
Abstract | PDF | WWW | BIB
Recognizing Image Style
Sergey Karayev, Matthew Trentacoste, Helen Han, Aseem Agarwala, Trevor Darrell, Aaron Hertzmann, Holger Winnemöller
BMVC, 2014.
Abstract | PDF | WWW
PortraitSketch: Face Sketching Assistance for Novices
Jun Xie, Aaron Hertzmann, Wilmot Li, Holger Winnemöller
Proc. of UIST'14, pp. 407--417, 2014.
Abstract | PDF | WWW | YouTube | BIB
Painting with Bob: Assisted Creativity for Novices
Luca Benedetti, Holger Winnemöller, Massimiliano Corsini, Roberto Scopigno
Proc. of UIST'14, pp. 419--428, 2014.
Abstract | PDF | WWW | Teaser | BIB

2013

Diffusion curves: a vector representation for smooth-shaded images.
Alexandrina Orzan, Adrien Bousseau, Pascal Barla, Holger Winnemöller, Joëlle Thollot, David Salesin
Commun. ACM 56(7): pp. 101--108 (2013), 2013.
Abstract | PDF | WWW | Video | BIB
Toward a Cognitive Theory of Creativity Support.
Nicholas M. Davis, Holger Winnemöller, Mira Dontcheva, Ellen Yi-Luen Do
Creativity & Cognition: pp. 13--22, 2013.
Abstract | PDF | WWW | BIB
WYSIWYG Stereo Painting
Yongjin Kim, Holger Winnemöller, Seungyong Lee
ACM Symposium on Interactive 3D Graphics and Games (I3D), 2013.
Abstract | PDF | WWW | BIB
NPR in the Wild
Holger Winnemöller
Image and Video-based Artistic Stylization, Computational Imaging and Vision Vol.42, pp.353--374, 2013.
Abstract | Preprint | WWW | BIB
Recognizing Image Style
Sergey Karayev, Aaron Hertzmann, Holger Winnemöller, Aseem Agarwala, Trevor Darrell
CoRR abs/1311.3715, 2013.
Abstract | PDF | WWW

2012

XDoG: An eXtended Difference-of-Gaussians Compendium including Advanced Image Stylization
Holger Winnemöller, Sven C. Olsen, Jan Eric Kyprianidis
Computers & Graphics, 36(6), pp. 740--753, 2012.
Abstract | PDF | WWW | Code | BIB

2011

XDoG: Advanced Image Stylization with eXtended Difference-of-Gaussians (Best Paper)
Holger Winnemöller
Proceedings of NPAR, 2011.
Errata: Due to a production problem, Eq.6 does not correctly reflect the intention of Fig.4. The sign should be flipped. For the correct equation and a convenient re-formulation, please refer to the follow-up paper ("XDoG: An eXtended Difference-of-Gaussians Compendium ...")
Abstract | PDF | Presentation | BIB

2010

Creating collections with automatic suggestions and example-based refinement
Adrian Secord, Holger Winnemöller, Wilmot Li, Mira Dontcheva
UIST '10. ACM, New York, NY, 249-258, 2010.
Abstract | PDF | ACM/DOI | BIB

2009

Texture Design and Draping in 2D Images
Holger Winnemöller, Alexandrina Orzan, Laurence Boissieux, Joëlle Thollot
Proc. Eurographics Rendering Symposium) Computer Graphics Forum 28(4), 2009.
Abstract | PDF | WWW | MOV | BIB

2008

Diffusion Curves: A Vector Representation for Smooth-Shaded Images
Alexandrina Orzan, Adrien Bousseau, Holger Winnemöller, Pascal Barla, Joëlle Thollot, David Salesin
ACM Transactions on Graphics (Proc. of SIGGRAPH'08), Volume 27, 2008.
Abstract | PDF | YouTube | WWW | BIB
Stylized Vector Art from 3D Models with Region Support
Elmar Eisemann, Holger Winnemöller, John C. Hart, David Salesin
Proc. Eurographics Rendering Symposium) Computer Graphics Forum 27(4), 2008.
Abstract | PDF | WWW | BIB
Forward Lean - Deriving Motion Illustrations from Video
Marc Nienhaus, Holger Winnemöller, Jürgen Döllner, Bruce Gooch
ACM SIGGRAPH Asia, Sketch Program, 2008.
Abstract | PDF | MP4 | M4V | 3GP

2007

Using NPR to evaluate perceptual shape cues in dynamic environments
Holger Winnemöller, David Feng, Sotori Suzuki, Bruce Gooch
Proceedings of NPAR, 2007.
Abstract | PDF | XVID | BIB | 3D Models (3DS) | 3D Models (OBJ)

2006

Perceptually-motivated Non-Photorealistic Graphics
Holger Winnemöller
PhD Dissertation, Northwestern University, 2006.
Abstract | PDF | BIB
Real-Time Video Abstraction
Holger Winnemöller, Sven C. Olsen, Bruce Gooch
ACM Transactions on Graphics, Proc. SIGGRAPH, 2006.
Abstract | WWW | PDF | BIB | PPT | RECORDING | SIGGRAPH SKETCH | SIGGRAPH POSTER
Temporal Segmentation and Visualization of High-Dimensional Data using Non-linear Dimensionality Reduction
Holger Winnemöller, Bruce Gooch
Unpublished, 2006.
Abstract | WWW | PEF | BIB

2005

Lightwaving: Estimating Light Positions from Photographs Alone
Holger Winnemöller, Ankit Mohan, Jack Tumblin, Bruce Gooch
Computer Graphics Forum 24(3), Proc. Eurographics, 2005.
Abstract | Paper | SIGGRAPH Sketch | BIB | XVID

2004

Automatic HDR Compositing
Holger Winnemöller, Ankit Mohan, Jack Tumblin
Unpublished, 2004.
Abstract | PDF

2003

Rendering Optimisations for Stylised Sketching
Holger Winnemöller, Shaun Bangay
Proc. ACM Afrigraph, 2003.
Abstract | WWW | PDF | BIB | AVI | AVI | AVI | AVI
Testing Effects of Color Constancy for Images displayed on CRT Devices
Holger Winnemöller
Technical Report, Department of Computer Science, University of Cape Town, 2003.
Abstract | PDF | WWW | BIB

2002

Geometric Approximations Towards Free Specular Comic Shading
Holger Winnemöller, Shaun Bangay
Computer Graphics Forum 21(3), Proc. Eurographics, 2002.
Abstract | WWW | PDF | BIB | AVI | AVI
Implementing Non-Photorealistic Rendering Enhancements with Real-Time Performance
Holger Winnemöller
Masters Thesis, Rhodes University, 2002.
Abstract | WWW | PDF | BIB
A Review of Zeki's: A Vision of the Brain
Holger Winnemöller
Unpublished, for personal use only, 2002.
Disclaimer: Much of the document I have prepared is copied verbatim (using a super-efficient digital camera-based OCR setup I devised for this purpose). All images, unless stated otherwise, are taken from Zeki's book or are reproduced based on images from that book. While I have obtained Prof. Zeki's permission for this, I am still awaiting response from the publisher. In the meantime, this report is intended for personal use only and shall not be published or distributed in any form whatsoever.
Abstract | PDF | WWW

2001

Super-realistic Rendering using Real-Time Tweening
Holger Winnemöller, Shaun Bangay
South African Telecom. Networks & Applications Conf., SATNAC, 2001.
Abstract | PDF | BIB | AVI | AVI | AVI

1999

Practical Gesture Recognition for Controlling Virtual Environments
Holger Winnemöller
Honours Thesis, Rhodes University, 1999.
Abstract | WWW | PDF | BIB