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Vector Extraction from design drawings for Intelligent 3d modeling of Transmission Towers

Computers, Materials & Continua 2025年第2期82卷 2813-2829页

作者： Ziqiang Tang Chao Han Hongwu Li Zhou Fan Ke Sun Yuntian Huang Yuhang Chen Chenxing Wang State Grid Jiangsu Electric Power Co. Ltd.Construction BranchNanjing210011China School of Automation Southeast UniversityNanjing210096China

Accurate vector extraction from design drawings is required first to automatically create 3d models from pixel-level engineering design drawings. However, this task faces the challenges of complicated design shapes as well as cumbersome and cluttered annotations on drawings, which interfere with the vector extraction heavily. In this article, the transmission tower containing the most complex structure is taken as the research object, and a semantic segmentation network is constructed to first segment the shape masks from the pixel-level drawings. Preprocessing and postprocessing are also proposed to ensure the stability and accuracy of the shape mask segmentation. Then, based on the obtained shape masks, a vector extraction network guided by heatmaps is designed to extract structural vectors by fusing the features from node heatmap and skeleton heatmap, respectively. Compared with the state-of-the-art methods, experiment results illustrate that the proposed semantic segmentation method can effectively eliminate the interference of many elements on drawings to segment the shape masks effectively, meanwhile, the model trained by the proposed vector extraction network can accurately extract the vectors such as nodes and line connections, avoiding redundant vector detection. The proposed method lays a solid foundation for automatic 3d model reconstruction and contributes to technological advancements in relevant fields.

关键词： design drawings semantic segmentation deep learning vector extraction digitization 3d modeling

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Nephron-sparing Surgery for Pediatric Renal Tumors After Centralization of Pediatric Oncology Care in the Netherlands: Improved Outcomes With 3d modeling

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JOURNAL OF PEdIATRIC SURGERY 2025年第3期60卷 162125-162125页

作者： Fitski, Matthijs Bokkernik, Guus M. J. van Peer, Sophie E. Hulsker, Caroline C. C. van Scheltinga, Sheila E. J. Terwisscha van de Ven, Cornelis P. Wijnen, Marc H. W. A. Klijn, Aart J. Van den Heuvel-Eibrink, Marry M. van der Steeg, Alida F. W. Princess Maxima Ctr Pediat Oncol Heidelberglaan 25 NL-3584 CS Utrecht Netherlands Univ Med Ctr Utrecht Wilhelmina Childrens Hosp Dept Pediat Urol Utrecht Netherlands

Background and aim: In this retrospective single center cohort study, we report the surgical outcomes of nephron-sparing surgery (NSS) for Wilms' tumor (WT) patients since centralization of pediatric oncology care in the Netherlands, and implementation of technological advancements. Therewith we describe the influence of experience and innovations for this type of surgery. Methods: We retrospectively assessed all NSS procedures from January 1st 2015 until January 1st 2024 for patients who underwent surgery for a renal tumor at the Princess Maxima Center for Pediatric Oncology. data were gathered on patient characteristics, diagnostic information, radiological characteristics, surgical technique and use of innovations, postoperative outcome, administered treatment and surgical follow-up. Results: 36 patients (58 % female, 42 % male) were included with a total of 43 NSS procedures. Mean (Sd) age at diagnosis was 33.3 (23.1) months. 16 procedures were performed without 3d models, of which 3 (18.8 %) resulted in an unexpected positive margin. 27 procedures were preoperatively planned with a 3d model with one (3.7 %) unexpected anticipated positive margins (p 1/4 0.101). Six (13.9 %) procedures had post-operative complications including five urine leakages, one chyle leakage and two (reversible) acute kidney insufficiency. Four patients received a re-intervention (JJ-stent or drain). Conclusions: In this retrospective single center cohort study, we show a good surgical outcome after NSS for children with renal tumors after the implementation of 3d models. This study can act as a baseline cohort to harmonize preoperative assessment, intraoperative technique and implementation of innovative surgical technology for further expansion of NSS for WT patients. (c) 2024 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY-NC-Nd license (http://***/licenses/by-nc-nd/4.0/).

关键词： Nephron-sparing surgery Wilms tumor Centralization 3d modeling Intraoperative ultrasound

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Structural insights into Trichuris muris eggs through 3d modeling, Cryo-SEM, and TEM of samples prepared with HPF-FS

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EXPERIMENTAL PARASITOLOGY 2025年 271卷 108924页

作者： Braga, Brunna Vianna Lima, Ludmila Rocha Belem, Larissa Figueiredo de Oliveira, dayane Alvarinho de Miranda, Kildare Rocha Lopes-Torres, Eduardo Jose Univ Estado Rio De Janeiro Fac Med Sci Dept Microbiol Immunol & Parasitol Rio De Janeiro Brazil Univ Estado Rio De Janeiro Sch Ind Design Rio De Janeiro Brazil Univ Fed Rio de Janeiro Carlos Chagas Filho Biophys Inst Rio De Janeiro Brazil Fed Univ Rio Janeiro Natl Ctr Struct Biol & Bioimaging Rio De Janeiro Brazil

Trichuriasis - a disease caused by Trichuris trichiura - affects underserved communities. Infection occurs by the ingestion of embryonated eggs, a resilient structure against environmental fluctuations - an essential feature for the survival and transmission of trichurids. This study aims to enhance our comprehension of the trichurid eggs by providing a characterization of the ultrastructure of eggshell and first-stage (L1) larvae of T. muris, a key experimental model for trichuriasis. We employed the following microscopy techniques: light, fluorescence, confocal, Cryo-SEM, and Transmission electron microscopy (TEM), analyzing unfixed, chemical and cryofixed samples. Light microscopy revealed the structure of the eggshell, consisting of three main layers: Pellicula ovi (PO), chitinous layer (CHI), and the electron-dense parietal coating (EdPC). Fluorescence microscopy showed the calcein's high affinity for the eggshell and polar plugs, while the dAPI distinctly stained the L1 larval cells. Using confocal microscopy and 3d modeling, we quantified an average of 151 larval cells. TEM of high-pressure frozen and freeze-substituted samples revealed that the PO and the EdPC layers lacked sublayers, while the CHI layer was composed of 12-14 sublayers. The CHI also contained continuous distinct organization structure forming the polar plugs. The combination of different sample fixation methods and advanced imaging techniques was crucial for revealing structural details of both the eggshell and L1 larva, including the arrangement of cells, cuticle, and an anterior pointed structure. These findings provide deeper insights into the structural biology of T. muris and offer valuable information for advancing parasite control strategies in both human and veterinary context.

关键词： Helminth Nematode Cryofixation Freeze substitution 3d modeling

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Wonders of Harbor and Grey Seal Whiskers: Morphology, Natural Frequencies, and 3d modeling

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AdVANCEd SCIENCE 2025年 e2500724页

作者： Zheng, Xingwen Kamat, Amar M. Cao, Ming Triantafyllou, Michael S. Kottapalli, Ajay Giri Prakash Univ Groningen Engn & Technol Inst Groningen Fac Sci & Engn NL-9747AG Groningen Netherlands Zhejiang Univ Inst Cyber Syst & Control Dept Control Sci & Engn Hangzhou 310027 Peoples R China Massachusetts Inst Technol MIT Dept Mech Engn Cambridge MA 02139 USA MIT Sea Grant Coll Program 77 Massachusetts Ave Cambridge MA 02139 USA

Seals can track fish using highly sensitive whiskers;however, the extent to which their morphologically diverse whiskers respond to hydrodynamic signals across frequencies remains unexplored. To address this, the lengths, thicknesses, curvatures, and natural frequencies of whisker arrays in grey seals (Halichoerus grypus) and harbor seals (Phoca vitulina) are measured. These values are mapped to their corresponding locations on the seal muzzle, and spatial trends (rostral-caudal and ventral-dorsal) are analyzed. These findings show that over 50% of whiskers exhibit underwater natural frequencies exceeding 80 Hz, which overlap with hydrodynamic fish trail frequencies (>100 Hz), demonstrating the adaptation of seal whiskers to hydrodynamic signals. Additionally, an open-access database of 141 full-length 3d whisker models is established. A streamlined method based on Euler spirals is proposed to fit and map seal whiskers simultaneously. This method evaluates the curvature of the full-length seal whisker and calculates morphological parameters (e.g., whisker axis and cross-sectional orientation angles) that are required for 3d whisker construction. The database of 3d seal whiskers offers a valuable resource for researchers in computational fluid dynamics, experimental biology, and sensor technology, supporting multidisciplinary studies of seal whiskers.

关键词： 3d modeling grey seals harbor seals natural frequencies whisker morphologies

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Chiaroscuro Photogrammetry: Revolutionizing 3d modeling in Low Light Conditions for Archaeological Sites

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JOURNAL OF FIELd ARCHAEOLOGY 2025年第2期50卷 132-144页

作者： Jalandoni, Andrea Haubt, Robert Walshe, Keryn Nowell, April Griffith Univ 1 Parklands DrG06 2-19C Southport Qld 4215 Australia Univ Auckland Auckland New Zealand Univ Victoria Victoria BC Canada

Archaeologists working in low light conditions have had difficulty producing 3d models that are both scientific and aesthetic. We are presenting chiaroscuro photogrammetry, a technique inspired by Renaissance artists, to solve this problem. The method is portable, inexpensive, low impact, adaptable, fast, and requires no additional expertise beyond photogrammetry. While first trialed on a rock and a tree that produced promising outcomes, the true test was on a panel of finger flutings in a completely dark chamber of Koonalda Cave, South Australia. The result was a 3d model of the finger flutings with evenly balanced light and deep colors, and the geometry of the model was free from holes and visible artifacts. The 3d model produced using chiaroscuro photogrammetry was visually and geometrically accurate, even more so than flash photogrammetry. Chiaroscuro photogrammetry has the potential to revolutionize 3d modeling in low light conditions for a variety of archaeological contexts.

关键词： 3d modeling finger flutings Koonalda Cave night photography low-light conditions photogrammetry

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VortSdF: 3d modeling with Centroidal Voronoi Tessellation on Signed distance Field

VortSDF: 3D Modeling with Centroidal Voronoi Tessellation on...

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2025 IEEE/CVF Winter Conference on Applications of Computer Vision, WACV 2025

作者： Thomas, diego Toussaint, Briac Franco, Jean-Sebastien Boyer, Edmond Kyushu University Japan Inria Grenoble Rhone-Alpes-LJK France Meta Reality Labs United States

ISBN: (纸本)9798331510831

Volumetric shape representations have become ubiquitous in multi-view reconstruction tasks. They often build on regular voxel grids as discrete representations of 3d shape functions, such as SdF or radiance fields, either as the full shape model or as sampled instantiations of continuous representations, as with neural networks. despite their proven efficiency, voxel representations come with the precision versus complexity trade-off. This inherent limitation can significantly impact performance when moving away from simple and uncluttered scenes. In this paper we investigate an alternative discretization strategy with the Centroidal Voronoi Tessellation (CVT). CVTs allow to better partition the observation space with respect to shape occupancy and to focus the discretization around shape surfaces. To leverage this discretization strategy for multi-view reconstruction, we introduce a volumetric optimization framework that combines explicit SdF fields with a shallow color network, in order to estimate 3d shape properties over tetrahedral grids. Experimental results with Chamfer statistics validate this approach with unprecedented reconstruction quality on various scenarios such as objects, open scenes or human. © 2025 IEEE.

关键词： 3d modeling

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Virtual Interactive 3d modeling to Improve Outcomes in Robot-Assisted Partial Nephrectomy: Clinical Trial Protocol for the Multicenter, Randomized 3dPN Study

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European Urology Open Science 2025年 76卷 58-64页

作者： Sigrun Holze Clara Steiner Anja dietel Toni Franz Phuc Ho Thi Nicole Köppe-Bauernfeind Miroslav Bačák Meinhard Mende Jens-Uwe Stolzenburg Department of Urology University Hospital Leipzig Leipzig Germany Lank Center for Genitourinary Oncology Dana-Farber Cancer Institute Boston MA USA Clinical Trial Center Leipzig University of Leipzig Leipzig Germany

3dPN is a prospective, multicenter, randomized, controlled, two-armed open trial with planned recruitment of 370 patients in ten centers over a period of 24 mo. The trial is evaluating the value of virtual interactive 3d modeling for robot-assisted partial nephrectomy (RAPN) by assessing clinical outcomes, patient understanding, and surgeon confidence. Patients aged ≥18 yr with kidney tumors ≤7 cm who have contrast-enhanced computed tomography (CT) scans available and for whom RAPN with a da Vinci Surgical System is planned are eligible for the study. Using 1:1 randomization, patients are assigned to either the 3d model–based RAPN arm or the 2d CT scan–based RAPN arm. This trial is registered on *** as NCT06056505.

关键词： Robot-assisted partial nephrectomy Kidney mass Minimally invasive surgery 3d modeling Nephron-sparing surgery Renal cell carcinoma

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A WebGL-based 3d furniture modeling system via light-field descriptor and interactive force-directed visualization

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Multimedia Tools and Applications 2025年 1-62页

作者： Yeh, San-Chi Yang, Chuan-Kai Cheng, Ling-Chi Department of Information Management National Taiwan University of Science and Technology No. 43 Sec. 4 Keelung Road Taipei10607 Taiwan

In recent years, the demand for designing and modeling tools for non-professional users has been rising. Among the available tools and methods, customizing an item of furniture according to personal preferences has also become increasingly popular. However, for non-professional modeling users, it is still not easy to design a customized 3d model from scratch. Therefore, this paper proposes an online 3d furniture modeling system to assist users to quickly and conveniently generate an ideal 3d furniture model. This system makes use of existing furniture models. We first extract the features of a 3d model via the LightField descriptor and perform similarity calculation. We then use the features of furniture data to form a Force-directed Layout to show the similarity among models. Our system allows users to find and select rough furniture models quickly. And through a simple interactive modeling visualization interface, users can change the components of furniture models. In addition, our system provides suggestions for similar components, as well as component adjustment tools, so that users can easily replace and edit components. As a result, an ideal furniture model can be produced. A user study has been conducted to show the effectiveness of our proposed system. © The Author(s) 2025.

关键词： 3d modeling

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3d modeling of the Structure of deposited Materials Based on Fe-Ti-Mo-B-C System

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MATERIALS SCIENCE 2023年第2期59卷 163-169页

作者： Ivanov, O. O. Prysiazhniuk, P. M. Bodrova, L. G. Kramar, G. M. Marynenko, S. Yu. Koval, I. V. Guryk, O. Ya. Ivano Frankivsk Natl Tech Univ Oil & Gas Minist Educ & Sci Ukraine Profess Coll Elect Devices Ivano Frankivsk Ukraine Ivano Frankivsk Natl Tech Univ Oil & Gas Minist Educ & Sci Ukraine Ivano Frankivsk Ukraine Ternopil Ivan Puluj Natl Tech Univ Minist Educ & Sci Ukraine Ternopol Ukraine

The structure of deposited layer based on the Fe-Ti-Mo-B-C system is investigated. A methodology for 3d modeling of the Fe(Mo, B)2 phase grain, which includes four stages, was developed. Blender software was used for 3d modeling, and the Image Pro Plus software was used for image analysis and measurements. The results show that in the Fe-Ti-Mo-B-C deposition, the main strengthening Fe(Mo, B)2 phase was formed around TiC grains, which act as modifiers.

关键词： deposition powder arc welding 3d modeling

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3d modeling and the Age of the Collision Metamorphism of the Khan-Khukhei Block, Northern Mongolia

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dOKLAdY EARTH SCIENCES 2024年第2期517卷 1340-1345页

作者： Semenov, A. N. Polyansky, O. P. Reverdatto, V. V. Russian Acad Sci Sobolev Inst Geol & Mineral Siberian Branch Novosibirsk 630090 Russia

The reconstruction of the Early Paleozoic collision metamorphism of the Khan-Khukhei Block (Northern Mongolia) based on 3d modeling of thermal state of the crust and isotope dating is presented. The age of garnet-biotite schist from a metamorphic complex of the Khan-Khukhei Block of 517.4 +/- 7.4 Ma is determined for the first time. 3d modeling was conducted to compare this age of metamorphism with the available age determinations of (post-) collision granite formation in the range of 513-505 Ma. The model considers radiogenic heating at an elevated heat production of rocks of the thickened crust of the Khan-Khukhei block as the cause of the migmatization and granitoid melts formation. 3d modeling was conducted for the first time for thermal-dome type of metamorphism. The results provide a realistic conception of magma generation in typical collision settings in the absence of mantle magmatic heat sources. The time interval between metamorphism and the stage of anatectic magma formation is 5-12 Ma.

关键词： metamorphism 3d modeling granitic magmatism Sm-Nd isotope dating gneiss metamorphic complex Khan-Khukhei

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