Creation of the Accurate Raster Driven Polygonal Environment for the 3D Surface Models Based on the LIDAR Technology

2014 ◽  
pp. 93-102
Author(s):  
Jan Hovad ◽  
Jitka Komarkova
Keyword(s):  
3D Surface ◽  
Surface Models

scholarly journals Soft Tissue Stability around Single Implants Inserted to Replace Maxillary Lateral Incisors: A 3D Evaluation

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
F. G. Mangano ◽  
F. Luongo ◽  
G. Picciocchi ◽  
C. Mortellaro ◽  
K. B. Park ◽  
...  
Keyword(s):  
Soft Tissue ◽  
South Korea ◽  
Soft Tissues ◽  
3D Models ◽  
Lateral Incisor ◽  
Engineering Software ◽  
3D Surface ◽  
Immediate Placement ◽  
Surface Models ◽  
3D Evaluation

Purpose. To evaluate the soft tissue stability around single implants inserted to replace maxillary lateral incisors, using an innovative 3D method.Methods. We have used reverse-engineering software for the superimposition of 3D surface models of the dentogingival structures, obtained from intraoral scans of the same patients taken at the delivery of the final crown (S1) and 2 years later (S2). The assessment of soft tissues changes was performed via calculation of the Euclidean surface distances between the 3D models, after the superimposition of S2 on S1; colour maps were used for quantification of changes.Results. Twenty patients (8 males, 12 females) were selected, 10 with a failing/nonrestorable lateral incisor (testgroup: immediate placement in postextraction socket) and 10 with a missing lateral incisor (controlgroup: conventional placement in healed ridge). Each patient received one immediately loaded implant (Anyridge®, Megagen, Gyeongbuk, South Korea). The superimposition of the 3D surface models taken at different times (S2 over S1) revealed a mean (±SD) reduction of 0.057 mm (±0.025) and 0.037 mm (±0.020) fortestandcontrolpatients, respectively. This difference was not statistically significant (p= 0.069).Conclusions. The superimposition of the 3D surface models revealed an excellent peri-implant soft tissue stability in both groups of patients, with minimal changes registered along time.

scholarly journals CONSISTENT MULTI-VIEW TEXTURING OF DETAILED 3D SURFACE MODELS

2015 ◽  
Vol II-3/W4 ◽  
pp. 25-31 ◽  
Author(s):  
K. Davydova ◽  
G. Kuschk ◽  
L. Hoegner ◽  
P. Reinartz ◽  
U. Stilla
Keyword(s):  
Large Scale ◽  
Texture Mapping ◽  
Aerial Images ◽  
Field Energy ◽  
Multiple Camera ◽  
3D Surface ◽  
Surface Models ◽  
Mapping Techniques ◽  
3D Scene ◽  
High Degree

Texture mapping techniques are used to achieve a high degree of realism for computer generated large-scale and detailed 3D surface models by extracting the texture information from photographic images and applying it to the object surfaces. Due to the fact that a single image cannot capture all parts of the scene, a number of images should be taken. However, texturing the object surfaces from several images can lead to lighting variations between the neighboring texture fragments. In this paper we describe the creation of a textured 3D scene from overlapping aerial images using a Markov Random Field energy minimization framework. We aim to maximize the quality of the generated texture mosaic, preserving the resolution from the original images, and at the same time to minimize the seam visibilities between adjacent fragments. As input data we use a triangulated mesh of the city center of Munich and multiple camera views of the scene from different directions.

Dealing with 3D Surface Models

2010 ◽  
pp. 73-81
Author(s):  
Mahbubur R. Meenar ◽  
John A. Sorrentino
Keyword(s):  
Input Data ◽  
Three Dimensional ◽  
Future Trends ◽  
Finite Sample ◽  
3D Surface ◽  
Information Models ◽  
Run Off ◽  
Surface Models ◽  
Data Points ◽  
Benefits And Costs

Three-dimensional surface modeling has become an important element in the processing and visualization of geographic information. Models are created from a finite sample of data points over the relevant area. The techniques used for these activities can be broadly divided into raster-based interpolation methods and vector-based triangulation methods. This chapter contains a discussion of the benefits and costs of each set of methods. The functions available using 3D surface models include elevation, queries, contours, slope and aspect, hillshade, and viewshed. Applications include modeling elevation, pollution concentration and run-off and erosion potential. The chapter ends with a brief discussion of future trends, and concludes that the choice among the methods depends on the nature of the input data and the goals of the analyst.

scholarly journals Generation of 3D Surface Models from Scanning Electron Microscope Images

2016 ◽  
Vol 22 (S3) ◽  
pp. 1144-1145
Author(s):  
Timothy Amish ◽  
Bryan T. Hansen ◽  
Elizabeth R. Fischer
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
3D Surface ◽  
Surface Models ◽  
Microscope Images ◽  
Scanning Electron

scholarly journals Revision of the Highly Specialized Ant Genus Discothyrea (Hymenoptera: Formicidae) in the Afrotropics with X-Ray Microtomography and 3D Cybertaxonomy

2019 ◽  
Vol 3 (6) ◽  
Author(s):  
Francisco Hita-Garcia ◽  
Ziv Lieberman ◽  
Tracy L Audisio ◽  
Cong Liu ◽  
Evan P Economo
Keyword(s):  
Three Dimensional ◽  
Junior Synonym ◽  
Micro Ct ◽  
Still Images ◽  
Distribution Maps ◽  
3D Surface ◽  
Species Complexes ◽  
Key Species ◽  
Surface Models ◽  
Ct Data

Abstract Discothyrea Roger, 1863 is a small genus of proceratiine ants with remarkable morphology and biology. However, due to cryptic lifestyle, Discothyrea are poorly represented in museum collections and their taxonomy has been severely neglected. We perform the first comprehensive revision of Discothyrea in the Afrotropical region through a combination of traditional and three-dimensional (3D) cybertaxonomy based on microtomography (micro-CT). Species diagnostics and morphological character evaluations are based on examinations of all physical specimens and virtual analyses of 3D surface models generated from micro-CT data. Additionally, we applied virtual dissections for detailed examinations of cephalic structures to establish terminology based on homology for the first time in Discothyrea. The complete datasets comprising micro-CT data, 3D surface models and videos, still images of volume renderings, and colored stacked images are available online as cybertype datasets (Hita Garcia et al. 2019, http://doi.org/10.5061/dryad.3qm4183). We define two species complexes (D. oculata and D. traegaordhi complexes) and revise the taxonomy of all species through detailed illustrated diagnostic character plates, a newly developed identification key, species descriptions, and distribution maps. In total, we recognize 20 species; of which, 15 are described as new. We also propose D. hewitti Arnold, 1916 as junior synonym of D. traegaordhi Santschi, 1914 and D. sculptior Santschi, 1913 as junior synonym of D. oculata Emery, 1901. Also, we designate a neotype for D. traegaordhi to stabilize its status and identity, and we designate a lectotype for D. oculata. The observed diversity and endemism are discussed within the context of Afrotropical biogeography and the oophagous lifestyle.

scholarly journals Possibilities of use of remote sensing technology in survey process in the territory of Pils island in Jelgava

2018 ◽  
Vol 9 ◽  
pp. 16-23
Author(s):  
Armands Celms ◽  
Vivita Pukite ◽  
Ilona Reke ◽  
Jolanta Luksa
Keyword(s):  
Remote Sensing ◽  
Surface Relief ◽  
Laser Scanning ◽  
Unmanned Aircraft ◽  
3D Surface ◽  
Sensing Technology ◽  
Surface Models ◽  
Product Surface ◽  
Evaluation Of Data ◽  
Aircraft Data

In the study, creation of 3D surface relief model in Jelgava, for southern part of the Castle Island is depicted. Information about remote sensing, its historical development, as well as directions of remote sensing, development of photogrammetry and laser scanning is summarized and analysed. Principles of work and methods of photogrammetry and laser scanning. Information about creation of surface relief model from planning of unmanned aircraft, data capture and alignment to the end product – surface relief model. Application of evaluation of data obtained. The purpose of the study – to create 3D surface relief model in Jelgava, for the southern part of the Castle Island. Tasks of the study – to consider development and improvement of photogrammetry and its processes, as well as development of laser scanning and principles of its work; to research, analyse and describe technological processes of laser scanning; to create 3D surface relief model in Jelgava, for the southern part of the Castle Island; to perform comparison of surface models obtained and describe application of laser scanning. Preparation of surface relief model is time-consuming process, which includes flight planning and preparation of end-product. End-products obtained in data processing of laser scanning have very broad usage in many sectors related to geodesy and construction.

scholarly journals Systematics of the ant genus Proceratium Roger (Hymenoptera, Formicidae, Proceratiinae) in China – with descriptions of three new species based on micro-CT enhanced next-generation-morphology

ZooKeys ◽  
2018 ◽  
Vol 770 ◽  
pp. 137-192 ◽  
Author(s):  
Michael Staab ◽  
Francisco Hita Garcia ◽  
Cong Liu ◽  
Zheng-Hui Xu ◽  
Evan P. Economo
Keyword(s):  
New Species ◽  
3D Models ◽  
Micro Ct ◽  
Still Images ◽  
3D Surface ◽  
Surface Models ◽  
Scan Data ◽  
Three New Species ◽  
Worker Caste ◽  
Taxonomic System

The genusProceratiumRoger, 1863 contains cryptic, subterranean ants that are seldom sampled and rare in natural history collections. Furthermore, mostProceratiumspecimens are extremely hairy and, due to their enlarged and curved gaster, often mounted suboptimally. As a consequence, the poorly observable physical characteristics of the material and its scarcity result in a rather challenging alpha taxonomy of this group. In this study, the taxonomy of the ChineseProceratiumfauna is reviewed and updated by combining examinations of traditional light microscopy with x-ray microtomography (micro-CT). Based on micro-CT scans of seven out of eight species, virtual 3D surface models were generated that permit in-depth comparative analyses of specimen morphology in order to overcome the difficulties to examine physical material ofProceratium. Eight Chinese species are recognized, of which three are newly described:ProceratiumbruelheideiStaab, Xu & Hita Garcia,sp. n.andP.kepingmaisp. n.belong to theP.itoiclade and have been collected in the subtropical forests of southeast China, whereasP.shoheisp. n.belongs to theP.stictumclade and it is only known from a tropical forest of Yunnan Province.ProceratiumnujiangenseXu, 2006syn. n.is proposed as a junior synonym ofP.zhaoiXu, 2000. These taxonomic acts raise the number of known ChineseProceratiumspecies to eight. In order to integrate the new species into the existing taxonomic system and to facilitate identifications, an illustrated key to the worker caste of all Chinese species is provided, supplemented by species accounts with high-resolution montage images and still images of volume renderings of 3D models based on micro-CT. Moreover, cybertype datasets are provided for the new species, as well as digital datasets for the remaining species that include the raw micro-CT scan data, 3D surface models, 3D rotation videos, and all light photography and micro-CT still images. These datasets are available online (Dryad, Staab et al. 2018, http://dx.doi.org/10.5061/dryad.h6j0g4p).

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