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Motion capture for natural tree animation

Jie Long, Cory Reimschussel, Ontario Britton, Michael Jones
2009 SIGGRAPH 2009: Talks on - SIGGRAPH '09  
Figure 1 : Passive optical motion capture used to reconstruct structure and motion for a small tree.  ...  We address the problem of animating natural trees in the wind, making use of an optical motion capture system.  ...  Conclusion Our work is a step toward efficient reconstruction of complex natural tree motions in the wind. The data collection process preserves natural movements from both branches and leaves.  ... 
doi:10.1145/1597990.1598067 dblp:conf/siggraph/LongRBJ09 fatcat:xe3bp5n52rdazaez7p5yemahtu

Reconstructing 3D Tree Models Using Motion Capture and Particle Flow

Jie Long, Michael D. Jones
2013 International Journal of Computer Games Technology  
Recovering tree shape from motion capture data is a first step toward efficient and accurate animation of trees in wind using motion capture data.  ...  Existing algorithms for generating models of tree branching structures for image synthesis in computer graphics are not adapted to the unique data set provided by motion capture.  ...  Introduction Reconstruction of tree shape from motion capture data is an important step in replaying motion capture of trees under external forces, such as natural wind.  ... 
doi:10.1155/2013/363160 fatcat:y3uxe6f23zh6tmtmg3i3apznoa

Physically-based Driven Tree Animations [article]

William Van Haevre, Fabian Di Fiore, Frank Van Reeth
2006 Eurographics Workshop on Natural Phenomena  
Simulating dynamic natural wind effects on trees remains a challenging task in Computer Graphics.  ...  First, a small set of motion data is gathered from a physically-based driven tree animation.  ...  ), which are kindly funding part of the research reported in this paper.  ... 
doi:10.2312/nph/nph06/075-082 fatcat:n2zgfyspifcrbmfcmxbibkqlxe

Digital Simulation Research on Tree Dynamic Feature Capturing Information System Based on Image Processing

Lin Hong, Xu Weiheng, Qiang Zhenping, Lu Ning, Yu Yueyun
2016 IETI Transactions on Computers  
The proposed algorithm is applied to the leaves motion simulation when wind speed is not too large, the wind model should be improved for the more detailed research in the future, considering the condition  ...  This paper establishes tree model based on L system, and builds the wind field mathematical model added noise disturbance; focusing on the leaves dancing in the branches with the wind and leaves fall in  ...  Acknowledgments The work was supported by the following projects:The construction support project of Kunming  ... 
doaj:8b7a3bae92b446cf8e264592093579fc fatcat:cs4veang5fhjvn64ubu5x6d3sa

Video input driven animation (VIDA)

Sun, Jepson, Fiume
2003 Proceedings Ninth IEEE International Conference on Computer Vision  
We observe the effect of wind on a tree in a video, estimate wind speed parameters from its motion, and then use this to make synthetic objects move.  ...  The video footage can be seen as a controller for the motion of synthetic features, a concept we call video input driven animation (VIDA).  ...  We observe the effect of the wind on a tree in a video, estimate the wind speed from the tree's motion, then use the wind information to make computer generated objects move.  ... 
doi:10.1109/iccv.2003.1238319 dblp:conf/iccv/SunJF03 fatcat:4ki5qkabpjbctjm47dbdqoke6u

The Tracking and Frequency Measurement of the Sway of Leafless Deciduous Trees by Adaptive Tracking Window Based on MOSSE

Achuan Wang, Xinnian Yang, Dabo Xin
2022 Forests  
In order to obtain trees sway frequency in wind, a method of tracking and measuring the sway frequency of leafless deciduous trees by adaptive tracking window based on MOSSE was proposed.  ...  The results show that the video-based method can be used successfully for measuring the sway frequency of leafless deciduous trees.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/f13010081 fatcat:nh2ff7fxo5gppnydopculstbgm

Seeing the Wind: Visual Wind Speed Prediction with a Coupled Convolutional and Recurrent Neural Network [article]

Jennifer L Cardona, Michael F Howland, John O Dabiri
2019 arXiv   pre-print
tree in naturally occurring wind.  ...  Predictions for wind speeds ranging from 0.75-11 m/s showed agreement with measurements from a cup anemometer on site, with a root-mean-squared error approaching the natural wind speed variability due  ...  Acknowledgements The authors acknowledge Kelyn Wood, who assisted in setup for the wind tunnel test set. J.L.C. is  ... 
arXiv:1905.13290v3 fatcat:cx6jva344ve57pundnlnidfvre

Generation Of Wind Power Using Helical Structured Blades By The Concept Of Wind Tree

2017 Zenodo  
The Wind tree is a concept that uses a helical blade (VAWT) for generation of electric power.  ...  Despite of the wind being fluctuating in nature; the turbine is capable of generating electricity, as a small waft of air is sufficient to rotate this turbine.  ...  The turbine being small and light in weight are set in motion by winds as light as 4.4 miles/hr.  ... 
doi:10.5281/zenodo.1463713 fatcat:zztb6o7iajbzjlrtzvubaudy7i

HMM Based Method for Dynamic Texture Detection

B. Ugur Toreyin, A. Enis Cetin
2007 2007 IEEE 15th Signal Processing and Communications Applications  
It is observed that the motion vectors of most of the dynamic textures (e.g. sea waves, swaying tree leaves and branches in the wind, etc.) exhibit random motion.  ...  A method for detection of dynamic textures in video is proposed.  ...  motion of tree branches in the wind.  ... 
doi:10.1109/siu.2007.4298714 fatcat:5c5lyxb7kjesbmeip7m2fxff3q

Electrostatic forces in wind-pollination—Part 2: Simulations of pollen capture

George E. Bowker, Hugh C. Crenshaw
2007 Atmospheric Environment  
However, during light wind conditions (e.g. 1 m s À1 ), atmospheric electricity may be a significant factor in the capture of wind-dispersed pollen. r  ...  The importance of electrostatic forces in pollen capture is limited by wind, becoming virtually irrelevant at high wind speeds (e.g. 10 m s À1 ).  ...  Perry for advice and assistance. This work was submitted in partial fulfillment of a Ph.D. in Zoology at Duke University (G.E.B.).  ... 
doi:10.1016/j.atmosenv.2006.10.048 fatcat:g2kmful2gjc4vlflasyothxjxu

Animal Locomotion

1874 Nature  
This instrument depended for its function on the wind. If * See former communication, NATURe:, vo1. ix. p.  ...  left in the aeroscope for the next observation.  ...  The nature of the captures varied according to the direction and velocity of the wind, the state of the weather, and the season of the year.  ... 
doi:10.1038/009440a0 fatcat:7wpuklud3jhata3s2w77umzsje

Foliage motion under wind, from leaf flutter to branch buffeting

Loïc Tadrist, Marc Saudreau, Pascal Hémon, Xavier Amandolese, André Marquier, Tristan Leclercq, Emmanuel de Langre
2018 Journal of the Royal Society Interface  
The wind-induced motion of the foliage in a tree is an important phenomenon both for biological issues ( photosynthesis, pathogens development or herbivory) and for more subtle effects such as on wi-fi  ...  Here, in an experimental study on a whole tree in a large-scale wind tunnel, we present the first empirical evidence that foliage motion is actually dominated by individual leaf flutter at low wind velocities  ...  Flamand and all the Nantes CSTB team members for help in setting up and supervising the experiment, and O. Roche from the Magma and Volcanoes laboratory for providing a high-speed camera.  ... 
doi:10.1098/rsif.2018.0010 pmid:29743271 fatcat:3sjgppmv4bhrbi5qsxqxxw3neq

Page 440 of Nature Vol. 9, Issue 232 [page]

1874 Nature  
These were soon followed by the triangular pollen of birch and hazel—trees depending, like poplar, on the agency of the wind for fertilisation.  ...  The nature of the captures varied according to the direction and velocity of the wind, the state of the weather, and the season of the year.  ... 

Study of Plant Animation Synthesis by Unity3D [chapter]

Yanna Jiang, Boxiang Xiao, Baozhu Yang, Xinyu Guo
2015 IFIP Advances in Information and Communication Technology  
Virtual plant is a novel research issue in computer applications, and realistic plant animation is widely used in many fields.  ...  By setting a good interactive interface, users can dynamically adjust the parameters to realize different animation effects. Finally, concluding and analyzing this method.  ...  from video, mapping it to 3D plant models,forming the plant animation.Xiao Boxiang et al. [6] presented a motion capture data-driven animation approach ,reconstructed plant motion by real plant scanned  ... 
doi:10.1007/978-3-319-19620-6_39 fatcat:7j6tqmedqbbr3hveljfh5o63u4

Hierarchical Retargetting of 2D Motion Fields to the Animation of 3D Plant Models [article]

Julien Diener, Lionel Reveret, Eugene Fiume
2006 Proceedings of the 2004 ACM SIGGRAPH/Eurographics symposium on Computer animation - SCA '04  
Thus, a single video source of a moving shrub becomes an input device for a large class of virtual shrubs. We illustrate the results on two examples of shrubs and one outdoor tree.  ...  The complexity of animating trees, shrubs and foliage is an impediment to the efficient and realistic depiction of natural environments.  ...  We have include in the video a preliminary test on a real outdoor tree with strong wind (Figure 12 ).  ... 
doi:10.2312/sca/sca06/187-194 fatcat:mldwvkfdt5fczcnfkt222jlfmq
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