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30 results for “3D photogrammetry”
MCR LTER: Coral Reef: 3D photogrammetry improves measurement of growth and biodiversity patterns in branching corals; data for Curtis 2023, Coral Reefs
These data and code were generated in support of the manuscript: Curtis JS, Galvan JW, Primo A, Osenberg CW, and AC Stier, Coral Reefs. We collected manual and photogrammetry-based measurements of coral size and volume to examine which method best described short-term coral growth and links between coral habitat and biodiversity of CAFI (coral-associated fishes and invertebrates). This study was completed between August and December 2019 on an experimental array located in the back reef off the south shore of Moorea, French Polynesia. These data were published in Coral Reefs, analyses and full methods descriptions of this model can be found in the manuscript “3D photogrammetry improves measurement of growth and biodiversity patterns in branching corals”. This manuscript uses data collected by the U.S. National Science Foundation's (NSF) Moorea Coral Reef Long Term Ecological Research (MCR LTER) site under Grant No. OCE 2224354 (and earlier awards). Additional financial support to the MCR LTER site was provided through a generous gift from the Gordon and Betty Moore Foundation. Research was completed under permits issued by the French Polynesian Government (Délégation à la Recherche) and the Haut-commissariat de la République en Polynésie Francaise (DTRT) (Protocole d'Accueil 2005-2023).
Rundum-Fotos eines marokkanischen rabābs zur Erstellung eines 3D-Modells mittels Photogrammetrie
<p>Instrument: <i>rabāb</i><strong> </strong><br>Herkunftsland: Marokko <br>Herkunftsort: Fès <br>Instrumentenbauer: Abdessalam Chiki <br>Herstellungsjahr: 2015 <br>Aufbewahrungsort: Basel, Privatbesitz von Thilo Hirsch </p><p>Maße: <br>Gesamtlänge: 513,2 mm <br>Max. Korpusbreite: 114,8 mm <br>Breite am Fellansatz: 96,2 mm <br>Breite am Obersattel: 31,6 mm <br>Korpustiefe am Fellansatz: ca. 80 mm </p><p>Schwingende Saitenlängen: <br>d-Saite: 410 mm <br>G-Saite: 403 mm </p><p>Material: <br>Korpus: Nussbaum <br>Wirbelkasten: Nussbaum <br>Griffbrett: Acajou (Mahagoni) <br>Dekoration: Perlmutt <br>Balken: Fichte <br>Obersattel/Saitenhalterknopf: Knochen <br>Steg: Bambus <br>Felldecke: Ziegenfell </p><p>Fotos: Thilo Hirsch, 29.–31.10.2019 und 7.12.2019 </p><p>Technische Angaben zu den Fotos: <br>Kamera: Nikon D7200 <br>Farbraum: RGB <br>Brennweite: 35 mm <br>Die Fotos wurden im RAW-Format (.nef) gemacht und müssen teilweise noch entsprechend aufgehellt werden, da für die Beleuchtung LED-Lampen verwendet wurden. Das erste Foto beinhaltet eine X-Rite Farbkarte für den Weissabgleich und die Farbkorrektur. Die Angaben zu Blendenzahl, Belichtungszeit und ISO-Empfindlichkeit finden sich in den jeweiligen Bildinformationen.</p>
Digital models of test objects captured by RFSAT Ltd using 3D photogrammetry
<p>This data set contains a number of digital models produced via 3D photogrammetric scanning as part of the SCAN4RECO project, funded by the European Horizon'2020 program. Scanning and processing of models was done with Pix4D Mapper and Autodesk ReMake software from images captured with Canon 5DS camera in 50 Megapixel image resolution. Example objects include Byzantine icons painted on wood, oil paintings on canvas and painted Venetian carnival paper masks.</p> <p>Second version of the data set includes historical icons of Saint DImitrios and Saint Archangel Michael, an icon of Saint Mary painted specially for testing SCAN4RECO technologies, as well as models of an original high-relief sculpture from OPD and of its 3D printed copy (made by Fraunhofer-IGD and hand painted by RFSAT)..</p> <p>Selected models can be also seen in the SCAN4RECO Virtual Museum developed by CERTH-ITI:<br> http://scan4reco.eu/scan4reco/content/scan4reco-virtual-museum</p>
Fig. 6.1. Shell digitised with different methods. The photogrammetry model was captured with a 100 in Handbook of best practice and standards for 2D+ and 3D imaging of natural history collections
Fig. 6.1. Shell digitised with different methods. The photogrammetry model was captured with a 100 mm Macro lens and processed with Agisoft Photoscan. The visual comparison of the mollusc shows a similar level of detail between photogrammetry and MechScan for the external surfaces, with still a bit more detail for the MechScan. The HDI Advance has a much lower resolution.
Tower of Babylon Stele in 3D photogrammetry
<p>Black stone stele in two fragments with the only known original side illustration of the Tower in Babylon and the only picture of the king Nebuchadnezzar II so far found in Mesopotamia. The tower or ziggurat was 90 x 90 m with a height also of 90 m. The stele was discovered in Babylon in the early 1990s, for 28 years it was housed in the Schøyen Collection Oslo, and since December 2023 it is back in Iraq and the Iraq Museum Baghdad. The photogrammetry was produced by Olof Pedersén in October 2023 as documentation before the stele was given to Iraq.</p>
FIGURE 8. Molfetta dinosaur tracks, photogrammetry derived 3D in The use of aerial and close-range photogrammetry in the study of dinosaur tracksites: Lower Cretaceous (upper Aptian/lower Albian) Molfetta ichnosite (Apulia, southern Italy)
FIGURE 8. Molfetta dinosaur tracks, photogrammetry derived 3D models and interpretations; 1-2, DEM and contour line map of a theropod footprint (contour lines have an interval of 0.2 cm); 4-5, DEM and contour line map of an ornitischian footprint; 3 and 6, interpretative outline drawings of the studied tracks.
Tombstone - 3d scan (photogrammetry)
Надгробный камень на Тришинском кладбище 1833 года (не точно) город Брест. 3d scan (photogrammetry) Source: Objaverse 1.0 / Sketchfab
3D data obtained with a MicroScribe digitising arm and photogrammetry to address bioarchaeological research questions
<p>Virtual methods for studying human remains are becoming increasingly popular in bioarchaeology, and the rate of technological innovation in the last few years has been such that we now have multiple options to choose from when collecting data. This raises the question of whether datasets generated with different methods are transposable. In the study reported here, we investigated whether it is valid to combine 3D data obtained with a MicroScribe digitising arm and 3D data collected via photogrammetry. We did so by simulating a population-based analysis similar to those commonly undertaken in bioarchaeology. Our sample comprised 19 crania from two ethnic groups, Ancient Egyptians and Guanches, and the landmarks we employed pertained to facial shape.</p> <p>The analyses yielded several findings. First, we found that photogrammetry was significantly more precise than the MicroScribe digitising arm. Second, the photogrammetry-based method revealed the existence of facial shape differences between the two ethnic groups that were not captured by the MicroScribe-based method. Third, we found that the two methods did not consistently capture the same facial shapes—they did for one of the ethnic groups but not for the other. Fourth, the analyses indicated that using the two methods can result in ethnic group-level differences in facial shape when they are applied to individuals from a single ethnic group. Lastly, the two methods of data collection yielded different patterns of variation in facial shape. Together, these findings suggest that combining 3D landmark coordinates collected with a MicroScribe and those obtained via photogrammetry may introduce considerable error into an analysis, and, consequently, bioarchaeologists should be cautious about doing so.</p>
3D Photogrammetry | Treasure Chest
My 3D reconstruction generated with photogrammetry software 3DF Zephyr v4.530 processing 140 images Source: Objaverse 1.0 / Sketchfab
A Non-destructive Method to Create a Time Series of Surface Area for Coral Using 3D Photogrammetry (Data)
<p>This is the underlying data for the publication "A Non-destructive Method to Create a Time Series of Surface Area for Coral Using 3D Photogrammetry" by Daniel D Conley and Erin N. R. Hollander published in 2021.</p>
BMP-2 photogrammetry 3D scan
This 3D model was generated with the photogrammetry software 3DF Zephyr v4.530 processing 683 images of which abuot 430 where DSLR RAW images and the rest being from 2 iPhone videos. **This 3D model is to be used as reference for 3D artists.** Originially created for [Gunner, HEAT, PC!](https://www.gunnerheatpc.com/)(GHPC). The BMP-2 (Boyevaya Mashina Pekhoty, Russian: Боевая Машина Пехоты, literally "infantry combat vehicle") is a second-generation, amphibious infantry fighting vehicle introduced in the 1980s in the Soviet Union, following on from the BMP-1 of the 1960s. This specific BMP-2 was used by the NVA the army of East Germany.  Source: Objaverse 1.0 / Sketchfab
3D photogrammetry and deep-learning deliver accurate estimates of epibenthic biomass
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3D data obtained with a MicroScribe digitising arm and photogrammetry to address bioarchaeological research questions
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Data from: Estimating body mass of free-living whales using aerial photogrammetry and 3D volumetrics
1. Body mass is a key life history trait in animals. Despite being the largest animals on the planet, no method currently exists to estimate body mass of free-living whales. 2. We combined aerial photographs and historical catch records to estimate the body mass of free-living right whales (Eubalaena sp.). First, aerial photogrammetry from unmanned aerial vehicles was used to measure the body length, width (lateral distance) and height (dorso-ventral distance) of free-living southern right whales (E. australis; 48 calves, 7 juveniles and 31 lactating females). From these data, body volume was estimated by modelling the whales as a series of infinitely small ellipses. The body girth of the whales was next calculated at three measurement sites (across the pectoral fin, the umbilicus and the anus) and a linear model was developed to predict body volume from the body girth and length data. To obtain a volume-to-mass conversion factor, this model was then used to estimate the body volume of eight lethally caught North Pacific right whales (E. japonica), for which body mass was measured. This conversion factor was consequently used to predict the body mass of the free-living whales. 3. The cross-sectional body shape (height-width ratio) of the whales was slightly flattened dorso-ventrally at the anterior end of the body, almost circular in the mid region, and significantly flattened in the lateral plane across the posterior half of the body. Compared to a circular cross-sectional model, our body mass model incorporating body length, width and height improved mass estimates by up to 23.6% (mean=6.1%, SD=5.27). Our model had a mean error of only 1.6% (SD=0.012), compared to 9.5% (SD=7.68) for a simpler body length-to-mass model. The volume-to-mass conversion factor was estimated at 754.63kg m-3 (SD=50.03). Predicted body mass estimates were within a close range of existing body mass measurements. 4. We provide a non-invasive method to accurately estimate body mass of free-living whales while accounting for both their structural size (body length) and relative body condition (body width). Our approach can be directly applied to other marine mammals by adjusting the model parameters (body mass model script provided).
Experimental studies on snaking in 3D-printed cylindrical shells under axial compression using photogrammetry
<p>The buckling instability of cylindrical shells under axial compression has been one of the most renowned problems in structural engineering for several decades. Many pioneering works in the 20<sup>th</sup> century have provided insights into understanding the shells' infamous imperfection sensitivity and led to reliability-based designs. However, a recent surge in numerical studies of the snaking phenomenon explores the development of a localised stable post-buckling mode in axially compressed cylindrical shells. Hitherto, none of the experimental studies report on the evolution of azimuthal snaking. In this work, experimental studies are carried out with the objective of revealing the snaking phenomenon. The axial compression experiments are performed on 3D-printed shells made of thermoplastic polyurethane (TPU). The work's novelty lies in the usage of TPU shells for slowing down the propagation of circumferential dimples and making it feasible to capture them using Photogrammetry. Despite the match between the experimental and numerical mode shapes, the experiments reveal multiple routes for the snaking sequence. Furthermore, mode transitions such as reduction in circumferential wave number and transformation of symmetric mode into an asymmetric one are observed. These experimental results provide insights into the localised phenomenon of snaking and validate numerical solutions.</p>
Movies of colored 3D models of wild creatures made by photogrammetry
<p>Movies of colored 3D models of wild creatures made by photogrammetry.</p> <p>Fig. 1: <em>Podothecus sachi</em></p> <p>Fig. 2: <em>Octopus_minor</em></p> <p>Fig. 3: <em>Rubus_hirsutus</em></p> <p> </p>
Interactive 3D model of the stone surface - Application of Forensic Photogrammetry and 3D Modelling to Improve Epigraphic Reading: Study of the Roman Altar of Gravesano (Ticino, Switzerland)
<p>Download the PDF document and open in with Adobe Reader on a local computer.</p> <p>The bookmarks allow the user to navigate through the pages of the PDF document.</p> <p>Page 1: Interactive 3D model of the stone. Click to activate the 3D content and use the toolbar to visualise the surface of the stone with different angles, zoom and lightings.</p> <p>Page 2: Visualisation of the 3D model of the stone surface created with Meshlab (v2016.12) using the Phong shader, with the light source from the left. </p> <p>Page 3: Visualisation of the 3D model of the stone surface using the Phong shader, with the light source from top left. </p> <p>Page 4: Visualisation using the Phong shader, with the light source from the top. </p> <p>Page 5: Visualisation of the 3D model of the stone surface using the Phong shader, with the light source from the right.</p> <p>Page 6: Visualisation of the 3D model of the stone surface created with Meshlab using the Radiance Scaling shader, with the light source from the bottom left.</p> <p>Page 7: Visualisation of the 3D model of the stone surface using the Radiance Scaling shader, with a distant light source from the bottom left.</p> <p>Page 8: Visualisation of the 3D model of the stone surface created with Meshlab using the Normal Map shader.</p>
Photogrammetry setup to record the stone surface - Application of Forensic Photogrammetry and 3D Modelling to Improve Epigraphic Reading: Study of the Roman Altar of Gravesano (Ticino, Switzerland)
<p>PDF document with lighting and camera setup to record the surface of the stone with multi-image photogrammetry.</p> <p>Page 1: Stone surface, images and camera positions</p> <p>Page 2: Setup of the raking light source</p> <p>Page 3: Adjustment of the angle of the light source to the stone surface. A slight upward angle relative to the horizon is chosen in the plane of the stone in order to keep an oblique incident light and project shadows in each character’s depression (see green long circular green arrow). The second angle is adjusted from the surface of the stone in order to define each character’s depression with sharp shadows.</p> <p>Page 4: Stone surface, images and camera positions with an the camera projection of the bottom right image outlined in red.</p>
3D Photogrammetry Versus Commercial Scanners for Accurate Repositioning of the Maxilla for Correction of the Dentofacial Deformity.
ClinicalTrials.gov study NCT05755022. IPD Sharing: Not stated. Countries: 1. Publications: 8.
Data from: Estimating body mass of free-living whales using aerial photogrammetry and 3D volumetrics
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