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Folded Paper Geometry from 2D Pattern and 3D Contour [article]

Damien Rohmer, Marie-Paule Cani, Stefanie Hahmann, Boris Thibert
2011 Eurographics State of the Art Reports  
Fold lines are explicitly identified and used to control a recursive, local sub- division process, leading to an efficient procedural modeling of the surface through a fold-aligned mesh.  ...  We propose a purely geometric solution to generate static folded paper geometry from a 2D pattern and a 3D placement of its contour curve.  ...  We therefore look for the optimal cubic curve such that the mesh computed after subdivision minimizes the error in length with respect to the pattern.  ... 
doi:10.2312/eg2011/short/021-024 fatcat:jsfj4wde7bbkvdlsika6ozxggy

Sketching Folds

Amaury Jung, Stefanie Hahmann, Damien Rohmer, Antoine Begault, Laurence Boissieux, Marie-Paule Cani
2015 ACM Transactions on Graphics  
The main challenge we address for building folded surfaces from sketches is that silhouette strokes on the sketch correspond to discontinuous sets of non-planar curves on the 3D model.  ...  This new method, interleaved with developability optimization steps, is implemented in a multi-view sketching system where the user can sketch the contours of internal folds in addition to the usual silhouettes  ...  An alternative approach for developable surface generation is to progressively optimize developability of a 3D mesh.  ... 
doi:10.1145/2749458 fatcat:53dcdrqgq5cbfm47ztwr3dessu

Computational paper wrapping transforms non-stretchable 2D devices into wearable and conformable 3D devices [article]

Yu-Ki Lee, Zhonghua Xi, Young-Joo Lee, Yun-Hyeong Kim, Yue Hao, Young-Chang Joo, Changsoon Kim, Jyh-Ming Lien, In-Suk Choi
2018 arXiv   pre-print
Here, we answer this conundrum by extending geometrical design in computational kirigami (paper cutting and folding) to paper wrapping.  ...  This in turn leads to a significant increase in the applicability of computational kirigami to real-world fabrication.  ...  However, when covering 3D complex surfaces, these structures inevitably result in openings that lead to design and functional limitations in conformal devices, such as sub-optimal coverage of printable  ... 
arXiv:1812.00003v2 fatcat:bl2wpe5a5bgjtoauhejcpzwk4y

Limited Angle C-Arm Tomography and Segmentation for Guidance of Atrial Fibrillation Ablation Procedures [chapter]

Dirk Schäfer, Carsten Meyer, Roland Bullens, Axel Saalbach, Peter Eshuis
2012 Lecture Notes in Computer Science  
The minor decrease in accuracy may be outweighed by clinical workflow improvement, gained when large C-arm angulations can be avoided.  ...  Angiographic projections of the left atrium (LA) and the pulmonary veins (PV) acquired with a rotational C-arm system are used for 3D image reconstruction and subsequent automatic segmentation of the LA  ...  Assessment of Segmentation Accuracy and Mesh Comparison: The segmentation accuracy is assessed by measuring the Euclidean surface-to-patch distance i,n between the automatic segmentation of the 3D-ATG  ... 
doi:10.1007/978-3-642-33415-3_78 fatcat:q6cwgrm2rfcktodxlbtdcyujie

Accurate Segmentation of the Left Ventricle in Computed Tomography Images for Local Wall Thickness Assessment [chapter]

J. Peters, J. Lessick, R. Kneser, I. Wächter, M. Vembar, O. Ecabert, J. Weese
2010 Lecture Notes in Computer Science  
In recent years, the fully automatic segmentation of the whole heart from three-dimensional (3D) CT or MR images has become feasible with mean surface accuracies in the order of 1mm.  ...  Wall thickness measurements in full 3D demonstrate that artifacts due to irregular endoand epicardial contours are drastically reduced.  ...  For the improved LV segmentation, we performed a 3-fold cross-validation on all 67 datasets.  ... 
doi:10.1007/978-3-642-15705-9_49 fatcat:bwkdi4hasffb3nj25a62232doe

Folding Meshes: Hierarchical Mesh Segmentation based on Planar Symmetry [article]

Patricio Simari, Evangelos Kalogerakis, Karan Singh
2006 Symposium on geometry processing : [proceedings]. Symposium on Geometry Processing  
An algorithm is presented for detecting such symmetries and segmenting the mesh into the symmetric and remaining regions.  ...  Also introduced is an application of the method: the folding tree data structure.  ...  Acknowledgements: Research funded in part by MITACS. http://www.mitacs.ca.  ... 
doi:10.2312/sgp/sgp06/111-119 fatcat:dncmiqmtkrhobm3yzpvhtwbe6q

Visualizing human brain surface from T1-weighted MR images using texture-mapped triangle meshes

Mika Seppä, Matti Hämäläinen
2005 NeuroImage  
The mapping is optimized to provide good texture-image resolution for the triangles with respect to their original sizes in the 3D MRI volume.  ...  Visualizing human brain surface from T 1 -weighted MR images using texture-mapped triangle meshes. NeuroImage, 26: 1-12.  ...  The need to segment and triangulate the brain surface into sulci is avoided as well.  ... 
doi:10.1016/j.neuroimage.2005.01.030 pmid:15862199 fatcat:lrv3ucyafjaw5bp2fnpkt3qszy

Precise segmentation of the left atrium in C-arm CT volumes with applications to atrial fibrillation ablation

Yefeng Zheng, Matthias John, Jan Boese, Dorin Comaniciu
2012 2012 9th IEEE International Symposium on Biomedical Imaging (ISBI)  
Furthermore, the boundary between parts is optimized to improve the mesh part labeling accuracy.  ...  In this paper, we exploit a part based LA model to handle the structural variations and different parts are then merged into a consolidated mesh.  ...  A four-fold cross validation is performed to evaluate our algorithm and the segmentation accuracy is measured using the symmetric surface-to-surface distance.  ... 
doi:10.1109/isbi.2012.6235835 dblp:conf/isbi/ZhengJBC12 fatcat:vhicuekutjabbb7jp7sjvbgicm

Construction of 3D Dynamic Statistical Deformable Models for Complex Topological Shapes [chapter]

Paramate Horkaew, Guang-Zhong Yang
2004 Lecture Notes in Computer Science  
It significantly extents the existing framework in that surfaces with higher genus can be effectively modeled.  ...  This paper describes the construction of 3D dynamic statistical deformable models for complex topological shapes.  ...  The function I captures the inversion of the element to prevent mesh folding.  ... 
doi:10.1007/978-3-540-30135-6_27 fatcat:yc22bncc7vbfvfoalnazdltg2u

Producing Physical Copies of the Digital Models via Generating 2D Patterns for "Origami 3D Printer" system

Bo Yu, Maria Savchenko, Junichi Shinoda, Luis Diago, Ichiro Hagiwara, V. Savchenko
2016 Journal of Advanced Simulation in Science and Engineering  
Mapping strips are done in two steps: 1) mapping onto the fixed plane in 3D; 2) mapping the flattened strips onto a print plane.  ...  This paper introduces a method for the automatic conversion of the 3D mesh models into a set of the 2D patterns for producing physical copy-models.  ...  Acknowledgement Several parts of the research work were carried out by the support of Grants-in-Aid for scientific research under Grant No. 26420211. We acknowledge its aid dearly.  ... 
doi:10.15748/jasse.3.58 fatcat:c5rfjz6prnek7negaposhrqmri

Full Body Performance Capture under Uncontrolled and Varying Illumination: A Shading-Based Approach [chapter]

Chenglei Wu, Kiran Varanasi, Christian Theobalt
2012 Lecture Notes in Computer Science  
Both the articulated motion of the limbs and then the fine-scale surface detail are estimated in a temporally coherent manner.  ...  In a temporal framework, differential 3D human posechanges from the previous time-step are expressed in terms of constraints on the visible image displacements derived from shading cues, estimated albedo  ...  The inset shows folds of the yellow T-shirt captured in 3D.  ... 
doi:10.1007/978-3-642-33765-9_54 fatcat:eebqrtpke5faljmaj6y6ve566m

Mechanobiologically optimized 3D titanium-mesh scaffolds enhance bone regeneration in critical segmental defects in sheep

Anne-Marie Pobloth, Sara Checa, Hajar Razi, Ansgar Petersen, James C. Weaver, Katharina Schmidt-Bleek, Markus Windolf, Andras Á. Tatai, Claudia P. Roth, Klaus-Dieter Schaser, Georg N. Duda, Philipp Schwabe
2018 Science Translational Medicine  
Med. 10, eaam8828 (Mechanobiologically optimized 3D titanium-mesh scaffolds enhance bone regeneration in critical segmental defects in sheep.  ...  This study demonstrates that mechanobiological optimization of 3D additive manufactured Ti-mesh scaffolds can enhance bone regeneration in a translational large animal study.  ...  critical segmental bone defect healing can be enhanced by mechanobiological optimization of 3D Ti-mesh scaffolds.  ... 
doi:10.1126/scitranslmed.aam8828 pmid:29321260 fatcat:fcdtowisijfh7l4dzyis75dgu4

High resolution model mesh and 3D printing of the Gaudí's Porta del Drac

Juan Corso, Pilar Garcia-Almirall, Adria Marco
2017 IOP Conference Series: Materials Science and Engineering  
The second one, about the optimization of the survey as a highresolution mesh to have a scaled 3D model to be printed in 3D, for the musealization of the Verdaguer House of Literature in Vil.la Joana (  ...  Secondly, we expose the procedures performed to move from a point cloud to an optimal high-resolution mesh to be printed in 3D, adapting it to all the limitations that this printing technique entails.  ...  of TLS, meshing and 3D printing (Figure 1 ).  ... 
doi:10.1088/1757-899x/245/5/052091 fatcat:uo7dfptxtzbxnomnsjum6vviuq

Atlas-Based Automatic Generation of Subject-Specific Finite Element Tongue Meshes

Ahmad Bijar, Pierre-Yves Rohan, Pascal Perrier, Yohan Payan
2015 Annals of Biomedical Engineering  
The 3D transformation field deforms the atlas' mesh to generate the subject-specific FE mesh.  ...  Generation of subject-specific 3D Finite Element (FE) models requires the processing of numerous medical images in order to precisely extract geometrical information about subject-specific anatomy.  ...  A ROI is segmented in the subject's images and its 3D surface is used as the target to deform the atlas' FE mesh.  ... 
doi:10.1007/s10439-015-1497-y pmid:26577253 fatcat:gj75rrhz25dt7dxtc7exnbrofm

A Machine Learning Method Based on 3D Local Surface Representation for Recognizing the Inscriptions on Ancient Stele

Sheriff Murtala, Ye-Chan Choi, Kang-Sun Choi
2021 Applied Sciences  
In this paper, we propose a method to segment relief region from 3D scanned ancient stele by exploiting local surface characteristics.  ...  A random forest model is trained with the local surface features and thereafter, used to classify 3D surface point as relief or non-relief.  ...  Abbreviations The following abbreviations are used in this manuscript: CSI Cross spin image k-NN k-nearest neighbor RF Random forest SI Spin image SIRI Segmented inscription recognition index SVM Support  ... 
doi:10.3390/app11125758 fatcat:ljgsyc6a3jcvdgseaxs2neqata
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