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Approximate image-based tree-modeling using particle flows
2007
ACM Transactions on Graphics
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Abstract We present a method for producing 3D tree models from input photographs with only limited user intervention. An approximate voxel-based tree volume is estimated using image information. ...
The models approximate the input images while forming botanically plausible branching structures. ...
Previous Work Classical tree modeling is rule-based or uses modeling procedures. ...
doi:10.1145/1276377.1276487
fatcat:zsjnkhlrtndghixjdtpmzhdo24
Approximate image-based tree-modeling using particle flows
2007
ACM SIGGRAPH 2007 papers on - SIGGRAPH '07
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Abstract We present a method for producing 3D tree models from input photographs with only limited user intervention. An approximate voxel-based tree volume is estimated using image information. ...
The models approximate the input images while forming botanically plausible branching structures. ...
Previous Work Classical tree modeling is rule-based or uses modeling procedures. ...
doi:10.1145/1275808.1276487
fatcat:tfhverj26zaaxf7vtgnjf6luee
Approximate image-based tree-modeling using particle flows
2007
ACM Transactions on Graphics
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Abstract We present a method for producing 3D tree models from input photographs with only limited user intervention. An approximate voxel-based tree volume is estimated using image information. ...
The models approximate the input images while forming botanically plausible branching structures. ...
Previous Work Classical tree modeling is rule-based or uses modeling procedures. ...
doi:10.1145/1239451.1239539
fatcat:teny65vtkfgt5fr5utfdrdladm
Comparing microsphere deposition and flow modeling in 3D vascular trees
2006
American Journal of Physiology. Heart and Circulatory Physiology
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Microsphere deposition is used as an estimate of local perfusion. A 3D cylindrical pipe model of the arterial tree is generated based on an image of the arterial cast. ...
Results of a flow model are compared with local microsphere deposition. High correlation (r 2 Ͼ 0.94) was observed between measured and modeled flows through the vascular tree segments. ...
Comparison of relative flow predictions based on the model with the microsphere data for vessel segments with one or more associated particles. ...
doi:10.1152/ajpheart.00146.2006
pmid:16766647
fatcat:betaqnunong7dequcgi7ep3wpm
Reconstructing 3D Tree Models Using Motion Capture and Particle Flow
2013
International Journal of Computer Games Technology
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We present a method for tree shape reconstruction using particle flow on input data obtained from a passive optical motion capture system. ...
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. ...
Image-or video-based approaches convert a set of 2D input images into 3D tree models by filling in the missing dimension. ...
doi:10.1155/2013/363160
fatcat:y3uxe6f23zh6tmtmg3i3apznoa
Vascular flow rendering for interactive simulation of contrast and drugs injection
2009
TENCON 2009 - 2009 IEEE Region 10 Conference
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Quadrilaterals which are aligned along the viewing direction are rendered to visualize the movement of particles through the flow modeled using Hagen-Poiseuille Flow. ...
Our visualization method achieves a computational efficient and good visual approximation of the flow of particles inside the vessels under fluoroscopic imaging. ...
The physics-based flow model is unique and is important for an accurate simulation of drug flow. ...
doi:10.1109/tencon.2009.5395825
fatcat:nerhlcaf3ffhhfem3ruphnumxa
Multiscale image-based modeling and simulation of gas flow and particle transport in the human lungs
2013
Wiley Interdisciplinary Reviews: Systems Biology and Medicine
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With this objective in mind, recent advances in computational fluid dynamics (CFD) of the bronchial airways -from a single bifurcation symmetric model to a multiscale image-based subject-specific lung ...
to integrate quantifiable regional features from imaging with associated value-added high-level modeling. ...
AIRWAY STRUCTURE
Symmetric, asymmetric, and CT-based airway models Symmetric tubular airway models based on Weibel's symmetric model 1 have been widely used to investigate pulmonary gas flow and particle ...
doi:10.1002/wsbm.1234
pmid:23843310
pmcid:PMC3763693
fatcat:jyor4jbgond77fwate22c4nnqu
Probabilistic Plant Modeling via Multi-View Image-to-Image Translation
[article]
2018
arXiv
pre-print
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By inferring the probability of branch existence using a Bayesian extension of image-to-image translation applied to each of multi-view images, our method generates a probabilistic plant 3D model, which ...
Unlike previous geometric approaches that heavily rely on the visibility of the branches or use parametric branching models, our method makes statistical inferences of branch structures in a probabilistic ...
Inspired by a conventional tree modeling approach [20] , we develop a branch structure generation method using particle flows. ...
arXiv:1804.09404v1
fatcat:c7abl347xjebtb6sbybcrzpm6a
Image-based modeling of lung structure and function
2010
Journal of Magnetic Resonance Imaging
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Current state-of-the-art in image-based modeling allows derivation of patient-specific models of the lung, lobes, airways, and pulmonary vascular trees. ...
Here we review some efforts to resolve each of these issues, with particular focus on image-based models that have been developed to simulate air flow from the mouth to the terminal bronchiole, and subjected ...
Acknowledgments We acknowledge the contribution of a team of students and postdoctoral staff to the development of this modeling effort: Jiwoong Choi, Haribalan Kumar, Nicholas Warren, Guohua Xia, and ...
doi:10.1002/jmri.22382
pmid:21105146
pmcid:PMC3058528
fatcat:uqs6m5ag7bgh7gi5gqhezqtoum
Regional Deposition of Particles in an Image-Based Airway Model: Large-Eddy Simulation and Left-Right Lung Ventilation Asymmetry
2011
Aerosol Science and Technology
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The airway model consists of a seven-generation human airway tree, with oral cavity, pharynx and larynx. The turbulent flow in the upper respiratory tract is simulated by large-eddy simulation. ...
Regional deposition and ventilation of particles by generation, lobe and lung during steady inhalation in a computed tomography (CT) based human airway model are investigated numerically. ...
Ma and Lutchen (2008) performed a CFD study on an airway model derived from a CT-based one-dimensional centerline airway tree using the k-ε turbulence model. ...
doi:10.1080/02786826.2010.517578
pmid:21307962
pmcid:PMC3034252
fatcat:rzz2ab473vhu3m4dbfsz46gpnq
Probabilistic Plant Modeling via Multi-view Image-to-Image Translation
2018
2018 IEEE/CVF Conference on Computer Vision and Pattern Recognition
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By inferring the probability of branch existence using a Bayesian extension of image-toimage translation applied to each of multi-view images, our method generates a probabilistic plant 3D model, which ...
Unlike previous geometric approaches that heavily rely on the visibility of the branches or use parametric branching models, our method makes statistical inferences of branch structures in a probabilistic ...
Inspired by a conventional tree modeling approach [20] , we develop a branch structure generation method using particle flows. ...
doi:10.1109/cvpr.2018.00307
dblp:conf/cvpr/IsokaneOIMY18
fatcat:xoqvhgpi5fb77of6nfg267m3ue
Simulation of phase contrast angiography for renal arterial models
2018
BioMedical Engineering OnLine
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In addition, a synthetic model was designed using a vascular tree growth simulation algorithm. ...
The results embrace a series of synthetic PCA images of the renal arterial trees giving insight into the image formation and quantification of kidney hemodynamics. ...
Marcin Majos, MD, of the Medical University of Lodz, for collection of the CT angiograms and ultrasound data, which served for constructing patient-specific renal arterial models. ...
doi:10.1186/s12938-018-0471-y
pmid:29661193
pmcid:PMC5902949
fatcat:whfptduotrebdhl4kvsc2arulq
Numerical simulations of aerosol delivery to the human lung with an idealized laryngeal model, image-based airway model, and automatic meshing algorithm
2017
Computers & Fluids
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The authors proposed a new method to automatically mesh computed tomography (CT)-based three-dimensional human airway geometry for computational fluid dynamics (CFD)-based simulations of pulmonary gas-flow ...
Furthermore, most of CT thoracic image data sets do not include the upper airway structures. ...
When constructing the geometric model, we extended the 1-D tree from the trachea to larynx using the average imaged tracheal diameter. ...
doi:10.1016/j.compfluid.2017.02.008
pmid:28959080
pmcid:PMC5612319
fatcat:iyts3nuv5raytksmssxmrjxiaq
A Novel adaptive optimization of Dual-Tree Complex Wavelet Transform for Medical Image Fusion
[article]
2020
arXiv
pre-print
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In this paper, a multimodal image fusion algorithm based on the dual-tree complex wavelet transform (DT-CWT) and adaptive particle swarm optimization (APSO) is proposed. ...
Experiment results show that the proposed method based on adaptive particle swarm optimization algorithm is remarkably better than the method based on particle swarm optimization. ...
For approximations in DT-CWT domain, use weighted factors to calculate the approximation of the fused image of F. ...
arXiv:2007.13538v1
fatcat:k75ctzpzonexlp34gcmsyxkyka
Approximate and probabilistic algorithms for shading and rendering structured particle systems
1985
Proceedings of the 12th annual conference on Computer graphics and interactive techniques - SIGGRAPH '85
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For example, structured particle systems have been used to generate trees and a grass-covered forest floor. ...
Recent work in stochastic modelling also enables us to model complex motions with random variation, such as a field of grass blowing in the breeze. ...
Approximately 1.1 million particles compose the trees in Figure 3 . ...
doi:10.1145/325334.325250
dblp:conf/siggraph/ReevesB85
fatcat:lcoorgyqtnendgwdrl2o3lptci
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