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The Sketch L-System: Global Control of Tree Modeling Using Free-Form Strokes [chapter]

Takashi Ijiri, Shigeru Owada, Takeo Igarashi
2006 Lecture Notes in Computer Science  
Our technique is the first attempt to control the growth of a simulation in L-system using stroke input. Fig. 6 . Tree models and the corresponding generating rules.  ...  L-system is a tool commonly used for modeling and simulating the growth of plants.  ...  We also thank Professor Nagashima for demonstrating the potential of our system by applying it to his art.  ... 
doi:10.1007/11795018_13 fatcat:kzj2o2izx5ck5hhb5gf2vfzo7m

Modeling plant structures using concept sketches

Fabricio Anastacio, Mario Costa Sousa, Faramarz Samavati, Joaquim A. Jorge
2006 Proceedings of the 3rd international symposium on Non-photorealistic animation and rendering - NPAR '06  
We demonstrate the capabilities of our system for a variety of plant models.  ...  Our approach is based on the traditional illustration technique of concept sketching. The user sketches the key construction lines for the main plant body and lateral organs.  ...  This work was supported in part by Discovery Grants from the Natural Sciences and Engineering Research Council of Canada and by an iCORE Graduate Student Scholarship.  ... 
doi:10.1145/1124728.1124746 dblp:conf/npar/AnastacioSSJ06 fatcat:ht2bbtnfsnddtedwn4qq53pgxe

Sketch-based tree modeling using Markov random field

Xuejin Chen, Boris Neubert, Ying-Qing Xu, Oliver Deussen, Sing Bing Kang
2008 ACM SIGGRAPH Asia 2008 papers on - SIGGRAPH Asia '08  
We show a variety of natural-looking tree models generated from freehand sketches with only a few strokes.  ...  Figure 1 : Examples of 3D tree models generated from freehand sketches. From left to right: three sketches, and corresponding tree models.  ...  Acknowledgement We would like to thank the reviewers for their valuable feedback. We are grateful to Fang Wen and Lin Liang at Microsoft Research Asia for initial discussions of the project.  ... 
doi:10.1145/1457515.1409062 fatcat:3e3akjoowbcmrch3xhcip3y4ba

Sketch-based tree modeling using Markov random field

Xuejin Chen, Boris Neubert, Ying-Qing Xu, Oliver Deussen, Sing Bing Kang
2008 ACM Transactions on Graphics  
We show a variety of natural-looking tree models generated from freehand sketches with only a few strokes.  ...  Figure 1 : Examples of 3D tree models generated from freehand sketches. From left to right: three sketches, and corresponding tree models.  ...  Acknowledgement We would like to thank the reviewers for their valuable feedback. We are grateful to Fang Wen and Lin Liang at Microsoft Research Asia for initial discussions of the project.  ... 
doi:10.1145/1409060.1409062 fatcat:htwyq54vcvg7zfrxchzdboplay

Seamless Integration of Initial Sketching and Subsequent Detail Editing in Flower Modeling

T. Ijiri, S. Owada, T. Igarashi
2006 Computer graphics forum (Print)  
To begin, the user quickly sketches the overall appearance of the desired model as a collection of two-dimensional (2D) strokes on hierarchical billboards.  ...  The global view of the entire model is always shown in a separate window to visualize how local modifications affect the global appearance.  ...  We also thank the Eurographics reviewers for their insightful comments. This work was funded in part by the IPA and JSPS Research Fellowship.  ... 
doi:10.1111/j.1467-8659.2006.00981.x fatcat:6nptxudyibebleonfuymbnyi5m

Interactive Design of Botanical Trees using Freehand Sketches and Example-based Editing

Makoto Okabe, Shigeru Owada, Takeo Igarash
2005 Computer graphics forum (Print)  
We present a system for quickly and easily designing three-dimensional (3D) models of botanical trees using freehand sketches and additional example-based editing operations.  ...  The system generates a 3D geometry from a twodimensional (2D) sketch using the assumption that trees spread their branches so that the distances between the branches are as large as possible.  ...  The system first assigns consistent local coordinate systems along the parent branch using the "turtle" of L-systems [PHHM96].  ... 
doi:10.1111/j.1467-8659.2005.00874.x fatcat:tzp7okztjnd4zkqeah7jgdh6ie

Interactive design of botanical trees using freehand sketches and example-based editing

Makoto Okabe, Shigeru Owada, Takeo Igarashi
2006 ACM SIGGRAPH 2006 Courses on - SIGGRAPH '06  
We present a system for quickly and easily designing three-dimensional (3D) models of botanical trees using freehand sketches and additional example-based editing operations.  ...  The system generates a 3D geometry from a twodimensional (2D) sketch using the assumption that trees spread their branches so that the distances between the branches are as large as possible.  ...  The system first assigns consistent local coordinate systems along the parent branch using the "turtle" of L-systems [PHHM96].  ... 
doi:10.1145/1185657.1185779 dblp:conf/siggraph/OkabeOI06 fatcat:pft7uv5tijhldoftlqaenbbxki

Interactive design of botanical trees using freehand sketches and example-based editing

Makoto Okabe, Shigeru Owada, Takeo Igarashi
2007 ACM SIGGRAPH 2007 courses on - SIGGRAPH '07  
We present a system for quickly and easily designing three-dimensional (3D) models of botanical trees using freehand sketches and additional example-based editing operations.  ...  The system generates a 3D geometry from a twodimensional (2D) sketch using the assumption that trees spread their branches so that the distances between the branches are as large as possible.  ...  The system first assigns consistent local coordinate systems along the parent branch using the "turtle" of L-systems [PHHM96].  ... 
doi:10.1145/1281500.1281537 dblp:conf/siggraph/OkabeOI07 fatcat:iaoaa6pmzzbt5nb4foa3w4vhva

Self-organizing tree models for image synthesis

Wojciech Palubicki, Kipp Horel, Steven Longay, Adam Runions, Brendan Lane, Radomír Měch, Przemyslaw Prusinkiewicz
2009 ACM Transactions on Graphics  
We illustrate the usefulness and versatility of the proposed method with diverse tree models, forest scenes, animations of tree development, and examples of combined interactive-procedural tree modeling  ...  The generated forms can be controlled with a variety of interactive techniques, including procedural brushes, sketching, and editing operations such as pruning and bending of branches.  ...  The support of this research by grants from the Natural Sciences and Engineering Research Council of Canada and Adobe Systems Incorporated, and graduate scholarships from NSERC and iCORE, is greatly appreciated  ... 
doi:10.1145/1531326.1531364 fatcat:ocx7goo2uja3ngruizzeoprida

A procedural method for irregular tree models

Ling Xu, David Mould
2012 Computers & graphics  
Powerful control over the global shape of the resulting tree is exerted by the shape of the initial graph, composed of simple geometric primitives arranged in part manually and in part procedurally.  ...  The collection of resulting paths forms a branching structure. We create a hierarchical tree structure by placing subgraphs around each endpoint and beginning again through some number of iterations.  ...  Thanks to the photographers who contributed images through Flickr: Daveybot, Niels Linneberg, jsogo, pelican, Sakall and joiseyshowaa. Also thanks to NSERC and the GRAND NCE for funding support.  ... 
doi:10.1016/j.cag.2012.08.005 fatcat:6cnkx2rrfzaqboxs565ggtgrcq

TreeSketch: Interactive Procedural Modeling of Trees on a Tablet [article]

Steven Longay, Adam Runions, Frédéric Boudon, Przemyslaw Prusinkiewicz
2012 Sketch-Based Interfaces and Modeling  
The system integrates procedural tree generation with a multi-touch tablet interface that provides detailed control of tree form.  ...  The modeler can control this process by directing growth with a procedural brush, changing parameters as the tree grows, interleaving controlled and autonomous growth, and editing generated forms.  ...  Acknowledgements We thank Thomas Burt for the tool bar icons, Helen Ai He for the swan model in Figure 7 , Wojtek Pałubicki and the participants of the 2011 Bellairs Workshop on Computer Animation for  ... 
doi:10.2312/sbm/sbm12/107-120 fatcat:ftaq6z4znvcxlnldnntoxsomqq

A VISUALIZATION MODEL OF FLOWER BASED ON DEFORMATION [chapter]

Ling Lu, Lei Wang, Xuedong Yang
2009 IFIP Advances in Information and Communication Technology  
A variety of flower can be produced by varying the deformation parameters. A number of examples are given in the paper to demonstrate the effectiveness of the proposed model.  ...  The detailed geometry of flower component is defined by basic equation for the basic shape along with a deformation function.  ...  The L-System defines plant structures using a set of rewriting rules (Prusinkiewicz et al.,1990) .  ... 
doi:10.1007/978-1-4419-0211-5_78 fatcat:2icymouih5hadbf2gcrc3gjpxu

Efficient Procedural Generation of Forests

Julian Kenwood, James E. Gain, Patrick Marais
2014 Journal of WSCG  
An international journal of algorithms, data structures and techniques for computer graphics and visualization, surface meshing and modeling, global illumination, computer vision, image processing and  ...  ACKNOWLEDGEMENTS This research was supported by an NRF/THRIP grant and the Centre for High Performance Computing.  ...  REFERENCES ACKNOWLEDGEMENTS This research was supported by an NRF/THRIP grant and the Centre for High Performance Computing.  ... 
dblp:journals/jwscg/KenwoodGM14 fatcat:ygvtyihkizfoxixjfaq7bisgbq

A framework for geometry generation and rendering of plants with applications in landscape architecture

Oliver Deussen
2003 Landscape and Urban Planning  
The resulting models are combined to form a realistically looking vegetation.  ...  In the final step, the models are converted into a special representation that is used to create synthetic illustrations of plants.  ...  Three components are used for global modeling and form the last group of components: 'FFD' and 'Hyperpatch' enable to apply free form deformations to the models and 'World' allows to redefine growing tendencies  ... 
doi:10.1016/s0169-2046(02)00216-5 fatcat:xnrwdgtkffbd7adthu6xjg5fty

Shape Synthesis from Sketches via Procedural Models and Convolutional Networks

Haibin Huang, Evangelos Kalogerakis, Ersin Yumer, Radomir Mech
2017 IEEE Transactions on Visualization and Computer Graphics  
By using an intuitive medium i.e., freehand sketching as input, users are set free from manually adjusting procedural model parameters, yet they are still able to create high quality content.  ...  However, controlling the outputs of these techniques for design purposes is often notoriously difficult for users due to the large number of parameters involved in these rule sets and also their non-linear  ...  We thank Daichi Ito for providing us with procedural models, and Olga Vesselova for proofreading. We finally thank the anonymous reviewers for their feedback.  ... 
doi:10.1109/tvcg.2016.2597830 pmid:27514042 fatcat:5hprwqvwy5agdkylun4yzq67ny
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