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Spherical harmonics based intrasubject 3-d kidney modeling/registration technique applied on partial information

IEEE TRANSACTIONS ON BIOMEdICAL ENGINEERING 2006年第11期53卷 2185-2193页

作者： dillenseger, Jean-Louis Guillaume, Helene Patard, Jean-Jacques Univ Rennes 1 LTSI INSERM U642 F-35042 Rennes France Rennes Univ Hosp Hop Pontchaillou Dept Urol F-35033 Rennes France

This paper presents a three-dimensional (3-d) shape reconstruction/intrapatient rigid registration technique used to establish a Nephron-Sparing Surgery preoperative planning. The usual preoperative imaging system is the Spiral CT Urography, which provides successive 3-d acquisitions of complementary information on kidney anatomy. Because the kidney is difficult to demarcate from the liver or from the spleen only limited information on its volume or surface is available. In this paper, we propose a methodology allowing a global kidney spatial representation on a spherical harmonics basis. The spherical harmonies are exploited to recover the kidney 3-d shape and also to perform intrapatient 3-d rigid registration. An evaluation performed on synthetic data showed that this technique presented lower performance then expected for the 3-d shape recovering but exhibited registration results slightly more accurate as the iterative closest point technique with faster computation time.

关键词： nephron-sparing surgery spherical harmonics 3-d modeling 3-d rigid registration

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INTERFACE PROGRAMS TO ENABLE FULL 3-d GEOLOGICAL modeling WITH A COMBINATION OF AUTOCAd ANd SURFER

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COMPUTERS & GEOSCIENCES 1991年第10期17卷 1383-1394页

作者： MARSCHALLINGER, R Institut fur Geologie und Paläontologie Universitat Salzburg Hellbrunnerstrasse 34 A-5020 Salzburg Austria

The interface programs presented in this paper are capable of connecting gridding- and contouring software (SURFER) and a 3-d CAd system (AutoCAd) to enable true 3-d modeling in a standard MS-dOS environment. The results of the contouring package can be passed to the CAd system for postprocessing as full 3-d information;independent 2-d information stored in the CAd system can be sent to the contouring package to be overlaid on 3-d models.

关键词： CAd GIS GRIddING 3-d modeling

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deep structure of the Lofoten-Vesteralen segment of the Mid-Norwegian continental margin and adjacent areas derived from 3-d density modeling

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JOURNAL OF GEOPHYSICAL RESEARCH-SOLId EARTH 2017年第2期122卷 1402-1433页

作者： Maystrenko, Y. P. Olesen, O. Gernigon, L. Gradmann, S. Geol Survey Norway NGU Trondheim Norway

To understand the major structural features of the sedimentary cover and crystalline crust of the Lofoten-Vesteralen margin and the northern part of the Voring segment of the Mid-Norwegian continental margin, a lithosphere-scale 3-d structural model has been constructed. This model extends from the exposed crystalline rocks of the Fennoscandian Shield in the east to the Cenozoic oceanic domain of the Norwegian-Greenland Sea in the west, covering the Vestfjorden, Ribban, and Rost Basins and the northern parts of the Voring Basin and Trondelag Platform. All available published and/or released data have been used to set the initial 3-d model which has been validated by means of 3-d density forward modeling to obtain a gravity-consistent 3-d structural/density model. Results from the 3-d density modeling reveal that relatively thick sedimentary rocks are present in the distal Rost Basin below the lava flows. The presence of a low-density more than 20 km thick granitic body has been modeled within the middle-upper crystalline crust beneath the eastern part of the Vestfjorden Basin and the adjacent mainland. Moreover, the results of the 3-d density modeling indicate the presence of an atypical low-density lithospheric mantle beneath a large part of the Lofoten-Vesteralen margin which is required to fit the regional component of the modeled gravity with the observed one. The pronounced crustal feature within the model area is the Bivrost Lineament that appears to be the deeply seated lithosphere-scale boundary that delineates clearly the Lofoten-Vesteralen segment from the Voring margin showing contrasting densities and crustal thicknesses.

关键词： 3-d modeling gravity field density continental margin sedimentary basin low-density mantle

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SHAPE PRESERVING NOISE ATTENUATION MOdEL FOR 3-d-modeling OF HERITAGE SITES BY PORTABLE LASER SCANS 9

SHAPE PRESERVING NOISE ATTENUATION MODEL FOR 3-D-MODELING OF...

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9th International Workshop on 3d-ARCH 3d Virtual Reconstruction and Visualization of Complex Architectures

作者： Zhang, Tian Abu-Hani, Joelle Filin, Sagi Technion Israel Inst Technol Mapping & Geoinformat Engn Haifa Israel

The development of efficient strategies to document cultural heritage sites is an active research field. One promising avenue to address that need may be found in the use of portable laser scanners. Such scans provide a mapping-grade level of accuracy, yet their level of characterization is limited by the low resolution of the generated point cloud and by the relatively noisy measurements. In this paper we study methods to attenuate the noisy responses as a means to improve the data quality and highlight the underlying structure. Unlike the prevailing plane-fitting-based filtering approaches that tend to blur salient features, we consider the use of local structure properties in our denoising strategy. We use the normal-based bilateral filtering of point clouds as a platform, yet introduce new normal preservation concepts whose incorporation significantly improves the overall denoising process performance. Results demonstrate how our proposed solution outperforms the standard plane-filtering and the naive bilateral approach. The attenuation we achieve yields a more visually pleasing entity description as well as simplified processing of subsequent procedures, including feature extraction and semantic segmentation.

关键词： Point clouds Noise attenuation 3-d modeling Laser scanning Portable laser scanners Cultural Heritage

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3d modeling of Small Industrial Parts Based on the Structured Illumination 12

3D Modeling of Small Industrial Parts Based on the Structure...

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12th International Conference on Fuzzy Systems and Knowledge discovery (FSKd)

作者： Wu, Gui Tao, Jun Jianghan Univ Educ Adm Off Wuhan Hubei Peoples R China Jianghan Univ Sch Math & Comp Sci Wuhan Hubei Peoples R China

ISBN: (纸本)9781467376822

As the developing of the computer-science and the photogrammetry, the skills and theories are used to all kinds of the industrial application. Because of the troubles and the difficulties, this paper proposes a new method for 3d measuring the small industrial parts on the principle of close range photogrammetry. According to the measurement of the control ground, the objective industrial parts are relative to be small. When the projectors and the cameras are respectively on calibration first, the projectors and cameras structure is very similar or same with binocular vision systems based on the theory of 3-d reconstructing. These 3-d spacious featured point coordinates could be calculated by the famous theory of space forward intersections. Applying the whole adjustment methods, the 3-d coordinates of the space points which are projected on the whole smooth surfaces of these objective small industry parts could be computed accurately and entirely. Its precision of 3-d coordinates is reached to +/- 0.1mm and it can be satisfied with the request of the practical applications and the close-range photogrammetry. As little effects by the space factors or the time factors, this 3-d model of their small industry parts should be practical and flexible. This 3-d model method of the small industry parts provided on this thesis is proved effective and correct on the basis of paper's experimental data.

关键词： 3-d modeling Small Industry Parts Camera Projectors Calibration digital Close Range Photogrammetry

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Compact and Accurate 3-d Face modeling Using an RGB-d Camera: Let's Open the door to 3-d Video Conference

Compact and Accurate 3-D Face Modeling Using an RGB-D Camera...

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IEEE International Conference on Computer Vision (ICCV)

作者： Anasosalu, Pavan Kumar Thomas, diego Sugimoto, Akihiro Univ So Calif Los Angeles CA 90089 USA Res Org Informat & Syst Natl Inst Informat Chiyoda Ku Tokyo 1018430 Japan

ISBN: (纸本)9781479930227

We present a method for producing an accurate and compact 3-d face model in real time using a low cost RGB-d sensor like the Kinect camera. We extend and use Bump Images for highly accurate and low memory consumption 3-d reconstruction of the human face. Bump Images are generated by representing the Cartesian coordinates of points on the face in the spherical coordinate system whose origin is the center of the head. After initialization, the Bump Images are updated in real time with every RGB-d frame with respect to the current viewing direction and head pose that are estimated using the frame-to-global-model registration strategy. While high accuracy of the representation allows to recover fine details, low memory use opens new possible applications of consumer depth cameras such as 3-d video conferencing. We validate our approach by quantitatively comparing our result with the result obtained by a commercial high resolution laser scanner. We also discuss the potential of our proposed method for a 3-d video conferencing application with existing internet speeds.

关键词： 3-d modeling GPU Kinect OpenGL Tracking three-dimensional displays game player face modeling Videoconferencing dOOR Compact Compact Pattern tracking Cameras Spherical coordinates Three dimensions GRAPPER PICK UP Graphics Processing Unit Cartesian coordinate system

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Resist loss in 3d compact modeling

Resist loss in 3D compact modeling

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Conference on Optical Microlithography XXV

作者： Zheng, Xin Huang, Jensheng Chin, Fook Kazarian, Aram Kuo, Chun-Chieh Synopsys 700 E Middlefield Rd Mountain View CA 94043 USA Synopsys Chupei City 302 Hsinchu Hsien Taiwan

ISBN: (纸本)9780819489821

An enhancement to compact modeling capability to include photoresist (PR) loss at different heights is developed and discussed. A hypsometric map representing 3-d resist profile was built by applying a first principle approximation to estimate the "energy loss" from the resist top to any other plane of interest. The result is compared and validated with 3d rigorous modeling as well as SEM images. Without increase in computation time, this compact model can construct 3d resist profiles capturing resist profile degradation at any vertical plane. Sidewall angle and standing wave information can also be determined from the vertical profile reconstruction. Since this method does not change any form of compact modeling, it can be integrated into validation and correction without any additional work.

关键词： OPC 3-d modeling Resist loss

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A unified and efficient framework for court-net sports video analysis using 3-d camera modeling

A unified and efficient framework for court-net sports video...

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Conference on Multimedia Content Access - Algorithms and Systems

作者： Han, Jungong de With, Peter H. N. Eindhoven Univ Technol POB 513 NL-5600 MB Eindhoven Netherlands RTSE LogicaCMG NL-5605 JB Eindhoven Netherlands

ISBN: (纸本)9780819466198

The extensive amount of video data stored on available media (hard and optical disks) necessitates video content analysis, which is a cornerstone for different user-friendly applications, such as, smart video retrieval and intelligent video summarization. This paper aims at finding a unified and efficient framework for court-net sports video analysis. We concentrate on techniques that are generally applicable for more than one sports type to come to a unified approach. To this end, our framework employs the concept of multi-level analysis, where a novel 3-d camera modeling is utilized to bridge the gap between the object-level and the scene-level analysis. The new 3-d camera modeling is based on collecting features points from two planes, which are perpendicular to each other, so that a true 3-d reference is obtained. Another important contribution is a new tracking algorithm for the objects (i.e. players). The algorithm can track up to four players simultaneously. The complete system contributes to summarization by various forms of information, of which the most important are the moving trajectory and real-speed of each player, as well as 3-d height information of objects and the semantic event segments in a game. We illustrate the performance of the proposed system by evaluating it for a variety of court-net sports videos containing badminton, tennis and volleyball, and we show that the feature detection performance is above 92% and events detection about 90%.

关键词： sports video content analysis camera calibration 3-d modeling tracking feature extraction

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3-d Geomechanical modeling of Reservoir Properties Changes When Applying Plasma Pulse Treatment 11

3-D Geomechanical Modeling of Reservoir Properties Changes W...

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11th IEEE International Conference on Application of Information and Communication Technologies (AICT)

作者： desyatkin, A. S. Pashchenko, A. F. Zaytsev, V. A. Georezonans Ltd Moscow Russia Inst Control Sci Moscow Russia Moscow MV Lomonosov State Univ Moscow Russia

ISBN: (纸本)9781538605011

The amount of methane produced by a well from a coal seam depends on the quality of the coal, the thickness of the formation, the lithostatic pressure and the size of the desorption funnel that forms around the well. In turn, the size of the funnel depends on the filtration properties of coal and the geological structure of the coal seam. Well-developed systems of macro, meso and micro fractures play a major role in the complex permeability of coal seams, including by reducing the diffusion time of gases through the carbon matrix. The nature of fracturing of the coal seam depends on endogenous, exogenous and technogenous factors. The latter usually play a decisive role in creating a secondary permeability. Russian technology of Plasma Pulse Treatment (PPT) creates a secondary permeability in the coal seam and connects the system of natural fracks (cleavage), thereby increasing the permeability of the coal seam over a large area. The estimation of the effect of the Plasma Pulse Treatment (PPT) on the permeability of coal seams is provided in the paper due to the creation of a secondary (technogenic) permeability.

关键词： Plasma Pulse Treatment Coal bed methane enhanced gas production degassing of coal secondary permeability 3-d modeling prediction model geomechanical modeling

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3d modeling of High Temperature Superconducting Staggered Array Undulator

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IEEE TRANSACTIONS ON APPLIEd SUPERCONdUCTIVITY 2013年第3期23卷

作者： Zhong, Zhaoyang Zhang, Min Wang, Wei Chudy, Michal Chen, Yiran Hsu, Chai-Hao Huang, Zhen Coombs, T. A. Univ Cambridge Dept Engn Cambridge CB3 0FA England

A 3-d model of a superconducting staggered array undulator has been built, which could serve as a powerful tool to solve electromagnetic problems and to realize field optimization of such design. Given the limitation of 2-d simulation for irregular shapes and complex geometries, 3-d models are more desirable for a comprehensive investigation. An optimization method for the undulator peak field is proposed;up to 32% enhancement can be achieved by introducing major segment bulks. Some improvements of the undulator design are obtained by careful analyzing of the simulation results.

关键词： Bulk superconductor induced magnetic field staggered-array undulator 3-d modeling

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