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Active Strokes: Coherent Line Stylization for Animated 3D Models [article]

Pierre Benard, Jingwan Lu, Forrester Cole, Adam Finkelstein, Joelle Thollot
2012
These effects are achieved with active strokes: 2D contours that approximate and track the lines of an animated 3D scene.  ...  This paper presents a method for creating coherently animated line drawings that include strong abstraction and stylization effects.  ...  Many of the images shown in this paper are rendered from 3D models courtesy of the Princeton Shape Benchmark, the Stanford Computer Graphics Laboratory, the Utah 3D Animation Repository, and the Computer  ... 
doi:10.2312/pe/npar/npar12/037-046 fatcat:6xl3zyfmfvbh7lc6fqb5bq4jsi

Stylized strokes for coherent line drawings

Liming Lou, Lu Wang, Xiangxu Meng
2015 Computational Visual Media  
Temporal coherence is one of the central challenges for rendering a stylized line.  ...  We also introduce a 3D parameter propagation and re-parameterization procedure to construct stroke paths along the 2D brush path to draw coherently stylized feature lines with a wide range of styles.  ...  Acknowledgements We would like to thank the anonymous reviewers for helpful suggestions. This work was supported by the National Natural Science Foundation of China (Nos.  ... 
doi:10.1007/s41095-015-0009-1 fatcat:w5ds4rxkuzasheonh6m2r4dib4

Stroke Surfaces: Temporally Coherent Artistic Animations from Video

J.P. Collomosse, D. Rowntree, P.M. Hall
2005 IEEE Transactions on Visualization and Computer Graphics  
The contribution of this paper is a novel framework for synthesizing nonphotorealistic animations from real video sequences.  ...  We demonstrate how this novel coherent shading framework may be combined with our earlier motion emphasis work to produce a comprehensive "Video Paintbox" capable of rendering complete cartoon-styled animations  ...  However, the footage passed to the back end is substituted for the nonphotorealistic animations stylized by our Stroke Surface framework.  ... 
doi:10.1109/tvcg.2005.85 pmid:16144251 fatcat:ei26puwmf5cbflo6dy3irvrhti

Temporally Coherent and Artistically Intended Stylization of Feature Lines Extracted from 3D Models

L. Cardona, S. Saito
2016 Computer graphics forum (Print)  
In this paper, we propose a method to maintain the temporal coherence of stylized feature lines extracted from 3D models and preserve an artistically intended stylization provided by the user.  ...  The proposed method produces temporally coherent and visually pleasing animations without the flickering artifacts of previous methods, while also maintaining the artistic intention of a goal stylization  ...  Acknowledgements The result images shown in this paper were generated using 3D models courtesy of the Stanford Computer Graphics Laboratory and the MIT Computer Graphics Group.  ... 
doi:10.1111/cgf.13011 fatcat:yymmyrraqngmtaicb3una7sgeq

Temporally Coherent Video Stylization [chapter]

Pierre Bénard, Joëlle Thollot, John Collomosse
2012 Computational Imaging and Vision  
The transformation of video clips into stylized animations remains an active research topic in Computer Graphics.  ...  In discussing coherence, we formalize the problem of temporal coherence in terms of three defined criteria, and compare and contrast video stylization using these.  ...  Some studies have been done in the context of 3D scenes animations [8, 9] and could be use as a starting point for evaluating stylized videos.  ... 
doi:10.1007/978-1-4471-4519-6_13 fatcat:rzfrfol6erdr3bldrw4xtjt4dq

State-of-the-Art Report on Temporal Coherence for Stylized Animations

Pierre Bénard, Adrien Bousseau, Joëlle Thollot
2011 Computer graphics forum (Print)  
We propose an analysis for both line and region stylization methods and discuss initial steps toward their perceptual evaluation.  ...  Despite significant progress over the past 15 years, the application of NPR to the generation of stylized animations remains an active area of research.  ...  Adrien Bousseau thanks the Eurographics PhD award committee for the invitation to submit this Stateof-the-Art paper.  ... 
doi:10.1111/j.1467-8659.2011.02075.x fatcat:7tfrqxq4djda3p5hpolj5ie5ni

Stylizing 2.5-D video

Noah Snavely, C. Lawrence Zitnick, Sing Bing Kang, Michael Cohen
2006 Proceedings of the 3rd international symposium on Non-photorealistic animation and rendering - NPAR '06  
However, because 2.5-D video contains only limited shape information and 3D correspondence over time is unknown, it is difficult to create temporally coherent stylized animations directly from raw 2.5-  ...  Conventional 2D inputs such as photographs and video are easy to create and capture, while 3D models allow for a wider variety of stylization techniques, such as cross-hatching.  ...  However, creating and animating 3D models of complex objects is difficult and time-consuming.  ... 
doi:10.1145/1124728.1124739 dblp:conf/npar/SnavelyZKC06 fatcat:lahzrq3h7nblnfxwgwjizwytom

Stylizing 2.5-D video

Noah Snavely, Larry Zitnick, Sing Bing Kang, Michael Cohen
2005 ACM SIGGRAPH 2005 Sketches on - SIGGRAPH '05  
However, because 2.5-D video contains only limited shape information and 3D correspondence over time is unknown, it is difficult to create temporally coherent stylized animations directly from raw 2.5-  ...  Conventional 2D inputs such as photographs and video are easy to create and capture, while 3D models allow for a wider variety of stylization techniques, such as cross-hatching.  ...  However, creating and animating 3D models of complex objects is difficult and time-consuming.  ... 
doi:10.1145/1187112.1187225 dblp:conf/siggraph/SnavelyZKC05 fatcat:r33h52pjvfcunepv736vbvwtue

Real-time pen-and-ink illustration of landscapes

Liviu Coconu, Oliver Deussen, Hans-Christian Hege
2006 Proceedings of the 3rd international symposium on Non-photorealistic animation and rendering - NPAR '06  
Silhouette stylization is performed in image-space. This avoids explicit computation of connected lines.  ...  This encompasses a simplification framework using clustering which enables new approaches to efficient and coherent rendering of stylized silhouettes, hatching and abstract shading.  ...  Acknowledgement We would like to thank the German Environment Foundation (DBU) for supporting this work within a PhD grant.  ... 
doi:10.1145/1124728.1124734 dblp:conf/npar/CoconuDH06 fatcat:grdfgclkdzdgnkrl7c2xpyhlri

Dynamic solid textures for real-time coherent stylization

Pierre Bénard, Adrien Bousseau, Joëlle Thollot
2009 Proceedings of the 2009 symposium on Interactive 3D graphics and games - I3D '09  
Abstract Stylized rendering methods, which aim at depicting 3D scenes with 2D marks such as pigments or strokes, are often faced with temporal coherence issues when applied to dynamic scenes.  ...  In this paper we describe a new texture based method for real-time temporally coherent stylization called dynamic textures.  ...  Acknowledgements Most 3D models used in this research were kindly provided by Laurence Boissieux.  ... 
doi:10.1145/1507149.1507169 dblp:conf/si3d/BenardBT09 fatcat:rla3yanyrfd37c4jyhmoofxcvi

Stereoscopic 3D line drawing

Yongjin Kim, Yunjin Lee, Henry Kang, Seungyong Lee
2013 ACM Transactions on Graphics  
We also propose a simple method to stylize stereo lines that ensures the stereo coherence of stroke textures across binocular views.  ...  ., wrinkles) in (a) and (c), whereas our method eliminates such artifacts in (b) and (d) by using stereo-coherent lines and stylization.  ...  Acknowledgements We would like to thank all the reviewers for their constructive com-  ... 
doi:10.1145/2461912.2462001 fatcat:ptehgnrsdzerhhbfpk3ed3nrte

Free-Hand Sketch Synthesis with Deformable Stroke Models

Yi Li, Yi-Zhe Song, Timothy M. Hospedales, Shaogang Gong
2016 International Journal of Computer Vision  
When our model is fit to a collection of sketches with similar poses, it discovers and learns the structure and appearance of a set of coherent parts, with each part represented by a group of strokes.  ...  We present a generative model which can automatically summarize the stroke composition of free-hand sketches of a given category.  ...  Photo to Sketch Stylization Plenty of works from the non-photorealistic animation and rendering (NPAR) community can produce sketch-like results for 2D images or 3D models.  ... 
doi:10.1007/s11263-016-0963-9 fatcat:mjiqdjp44ffg7ghv5lxyagfa6m

State of the "Art": A Taxonomy of Artistic Stylization Techniques for Images and Video

Jan Eric Kyprianidis, John Collomosse, Tinghuai Wang, Tobias Isenberg
2013 IEEE Transactions on Visualization and Computer Graphics  
Second, the evolution of local processing approaches toward edge-aware filtering for real-time stylization of images and video.  ...  This paper surveys the field of non-photorealistic rendering (NPR), focusing on techniques for transforming 2D input (images and video) into artistically stylized renderings.  ...  Acknowledgments: The authors would like to thank the anonymous reviewers for their constructive feedback.  ... 
doi:10.1109/tvcg.2012.160 pmid:22802120 fatcat:3o7mrkp7bjcprc2d7i76yt4cve

Directing Gaze in 3D Models with Stylized Focus [article]

Forrester Cole, Doug DeCarlo, Adam Finkelstein, Kenrick Kin, Keith Morley, Anthony Santella
2006 Symposium on Rendering  
We introduce a novel algorithm for local control of line density that exhibits a degree of temporal coherence suitable for animation.  ...  We present an interactive system for placing emphasis in stylized renderings of 3D models. The artist chooses a camera position, an area of interest, and a rendering style for the scene.  ...  We also thank Matthew Potts for the use of the house model with trees. This work is supported in part by NSF grant IIS-0511965.  ... 
doi:10.2312/egwr/egsr06/377-387 fatcat:bqy2ao7nknggdk2xqcaomc6lji

Data-driven curvature for real-time line drawing of dynamic scenes

Evangelos Kalogerakis, Derek Nowrouzezahrai, Patricio Simari, James Mccrae, Aaron Hertzmann, Karan Singh
2009 ACM Transactions on Graphics  
In a preprocessing step, our method learns the mapping from a low-dimensional set of animation parameters (e.g., joint angles) to surface curvatures for a deforming 3D mesh.  ...  This paper presents a method for real-time line drawing of deforming objects.  ...  We thank Michael Comet for the muscle arm model. We thank Chris Landreth for the Angela dataset and Alexis Angelidis for the Master Pai mesh.  ... 
doi:10.1145/1477926.1477937 fatcat:p2wwh3ttpffvnmzeefrwbddfha
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