Journal articles: 'Stereophotogrammetry'

1

Selvik, GÖRan. "Roentgen stereophotogrammetry." Acta Orthopaedica Scandinavica 60, sup232 (January 1989): 1–51. http://dx.doi.org/10.3109/17453678909154184.

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Brookshire, Greg, Morton Nadler, and Choon Lee. "Automated stereophotogrammetry." Computer Vision, Graphics, and Image Processing 52, no. 2 (November 1990): 276–96. http://dx.doi.org/10.1016/0734-189x(90)90059-5.

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Brookshire, Greg, Morton Nadler, and Choon Lee. "Automated stereophotogrammetry." Computer Vision, Graphics, and Image Processing 52, no. 1 (October 1990): 144. http://dx.doi.org/10.1016/0734-189x(90)90131-e.

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Dindaroğlu, Furkan, Pınar Kutlu, Gökhan Serhat Duran, Serkan Görgülü, and Erhan Aslan. "Accuracy and reliability of 3D stereophotogrammetry: A comparison to direct anthropometry and 2D photogrammetry." Angle Orthodontist 86, no. 3 (May 1, 2016): 487–94. http://dx.doi.org/10.2319/041415-244.1.

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ABSTRACT Objective: To evaluate the accuracy of three-dimensional (3D) stereophotogrammetry by comparing it with the direct anthropometry and digital photogrammetry methods. The reliability of 3D stereophotogrammetry was also examined. Materials and Methods: Six profile and four frontal parameters were directly measured on the faces of 80 participants. The same measurements were repeated using two-dimensional (2D) photogrammetry and 3D stereophotogrammetry (3dMDflex System, 3dMD, Atlanta, Ga) to obtain images of the subjects. Another observer made the same measurements for images obtained with 3D stereophotogrammetry, and interobserver reproducibility was evaluated for 3D images. Both observers remeasured the 3D images 1 month later, and intraobserver reproducibility was evaluated. Statistical analysis was conducted using the paired samples t-test, intraclass correlation coefficient, and Bland-Altman limits of agreement. Results: The highest mean difference was 0.30 mm between direct measurement and photogrammetry, 0.21 mm between direct measurement and 3D stereophotogrammetry, and 0.5 mm between photogrammetry and 3D stereophotogrammetry. The lowest agreement value was 0.965 in the Sn-Pro parameter between the photogrammetry and 3D stereophotogrammetry methods. Agreement between the two observers varied from 0.90 (Ch-Ch) to 0.99 (Sn-Me) in linear measurements. For intraobserver agreement, the highest difference between means was 0.33 for observer 1 and 1.42 mm for observer 2. Conclusions: Measurements obtained using 3D stereophotogrammetry indicate that it may be an accurate and reliable imaging method for use in orthodontics.

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Lee, Juhun, Manas Kawale, Fatima A. Merchant, June Weston, Michelle C. Fingeret, Dianne Ladewig, Gregory P. Reece, Melissa A. Crosby, Elisabeth K. Beahm, and Mia K. Markey. "Validation of Stereophotogrammetry of the Human Torso." Breast Cancer: Basic and Clinical Research 5 (January 2011): BCBCR.S6352. http://dx.doi.org/10.4137/bcbcr.s6352.

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The objective of this study was to determine if measurements of breast morphology computed from three-dimensional (3D) stereophotogrammetry are equivalent to traditional anthropometric measurements obtained directly on a subject using a tape measure. 3D torso images of 23 women ranged in age from 36 to 63 who underwent or were scheduled for breast reconstruction surgery were obtained using a 3dMD torso system (3Q Technologies Inc., Atlanta, GA). Two different types (contoured and line-of-sight distances) of a total of nine distances were computed from 3D images of each participant. Each participant was photographed twice, first without fiducial points marked (referred to as unmarked image) and second with fiducial points marked prior to imaging (referred to as marked image). Stereophotogrammetry was compared to traditional direct anthropometry, in which measurements were taken with a tape measure on participants. Three statistical analyses were used to evaluate the agreement between stereophotogrammetry and direct anthropometry. Seven out of nine distances showed excellent agreement between stereophotogrammetry and direct anthropometry (both marked and unmarked images). In addition, stereophotogrammetry from the unmarked image was equivalent to that of the marked image (both line-of-sight and contoured distances). A lower level of agreement was observed for some measures because of difficulty in localizing more vaguely defined fiducial points, such as lowest visible point of breast mound, and inability of the imaging system in capturing areas obscured by the breast, such as the inframammary fold. Stereophotogrammetry from 3D images obtained from the 3dMD torso system is effective for quantifying breast morphology. Tools for surgical planning and evaluation based on stereophotogrammetry have the potential to improve breast surgery outcomes.

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Alademomi, A. S., O. A. Jimoh, E. E. Atojunere, A. O. Alabi, S. A. Ishola, I. V. Ayantayo-Ojo, T. J. Salami, and J. O. Odumosu. "Evaluation of building deformation monitoring using stereophotogrammetry method and Kalman filter model." Nigerian Journal of Technology 43, no. 2 (July 19, 2024): 232–39. http://dx.doi.org/10.4314/njt.v43i2.5.

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This research investigates building deformation monitoring using stereophotogrammetry and integrating the Kalman filter to refine the result with conventional geodetic measurements being the baseline. By refining stereophotogrammetric coordinates with the Kalman filter, the study aims to improve measurement precision in the detection of displacement which is a measure of differences in converted stereo-coordinates obtained from the observed points over time. The refined coordinates exhibited higher accuracy compared to raw stereophotogrammetric measurements, highlighting the effectiveness of the proposed approach in reducing observational errors and relatively detected and quantified building deformations with an average rate of displacement of 0.025978169 m/epoch in the x-axis, 0.030498323 m/epoch in the y-axis, and 0.014078842 m/epoch in the z-direction, and a range of 0.000155 m/epoch to 0.593497 m/epoch. Points P03 (0.008 m/epoch), PH04 (0.021 m/epoch), and PH22 (0.037 m/epoch) on the monitored building indicated the highest displacement. This research contributes to the field of knowledge in the area of deformation monitoring by offering an innovative methodology for accurate assessment of building deformation. In the overview, this research demonstrates the potential of a simple, efficient, and cost-effective method of monitoring deformation that can ensure the safety and sustainability of engineering structures.

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Stekelenburg, Carlijn M., Martijn B. A. van der Wal, Dirk L. Knol, Henrica C. W. de Vet, and Paul P. M. van Zuijlen. "Three-Dimensional Digital Stereophotogrammetry." Plastic and Reconstructive Surgery 132, no. 1 (July 2013): 204–11. http://dx.doi.org/10.1097/prs.0b013e318290f675.

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Öktem, Rusen, Prabhat, James Lee, Aaron Thomas, Paquita Zuidema, and David M. Romps. "Stereophotogrammetry of Oceanic Clouds." Journal of Atmospheric and Oceanic Technology 31, no. 7 (July 2014): 1482–501. http://dx.doi.org/10.1175/jtech-d-13-00224.1.

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This study extends ground-based stereophotogrammetry of clouds to oceanic settings, where there are often none of the landmarks used in traditional camera calibration. This paper introduces a zero-landmark calibration technique and tests it with two off-the-shelf digital cameras situated about 1 km apart facing Biscayne Bay in Miami, Florida. The precision of the stereo reconstruction is studied theoretically, and the accuracy of the reconstructions is validated against lidar and radiosondes. The stereo cameras are able to accurately reconstruct a histogram of cloud-base heights from a single-image pair, a task that requires tens of minutes of observation from a cloud lidar. The stereo cameras are also able to accurately reconstruct horizontal winds in cloud layers with a temporal resolution in the range of 30 s to 5 min, compared to once every 12 h for a typical radiosonde launch site.

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Deste Gökay, Gonca, Pelin Özkan, Rukiye Durkan, and Perihan Oyar. "Measurements of surface scale changes in different denture base materials by stereophotogrammetric technique." Journal of Dental Research, Dental Clinics, Dental Prospects 15, no. 1 (February 13, 2021): 1–6. http://dx.doi.org/10.34172/joddd.2021.001.

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Background. This study aimed to evaluate the surface scale changes in the denture base material using different polymerization techniques, such as heat-cure/pressure polymerization system and injection molding technique with the stereophotogrammetric technique. The function of a complete denture is related to the adaptation of its base to the supporting areas. Proper adaptation of the base depends on the stability and retention of dentures. The surface scale changes of dentures during processing and in service are of great importance since they affect the denture base material’s fit. Methods. This study focused on the use of a computer-assisted stereophotogrammetric method for measuring changes in the volume of three different denture base resins of an edentulous maxillary ridge. A stone master model simulating the shape of an edentulous maxillary arch was used to prepare three groups of denture base resins. The stereophotographs were evaluated to determine the surface scale differences of maxillary jaws. Results. The results showed no significant differences between the denture borders for three denture base materials (P > 0.05). Conclusion. In the evaluation made using this technique, no significant difference was found in the different polymerization techniques in terms of surface scale changes for three denture base materials. Stereophotogrammetry, especially the digital stereophotogrammetric technique, has several useful research applications in prosthodontics.

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Quinzi, Vincenzo, Alessandro Polizzi, Vincenzo Ronsivalle, Simona Santonocito, Cristina Conforte, Rebecca Jewel Manenti, Gaetano Isola, and Antonino Lo Giudice. "Facial Scanning Accuracy with Stereophotogrammetry and Smartphone Technology in Children: A Systematic Review." Children 9, no. 9 (September 14, 2022): 1390. http://dx.doi.org/10.3390/children9091390.

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The aim of the study was to systematically review and compare the accuracy of smartphone scanners versus stereophotogrammetry technology for facial digitization in children. A systematic literature search strategy of articles published from 1 January 2010 to 30 August 2022 was adopted through a combination of Mesh terms and free text words pooled through boolean operators on the following databases: PubMed, Scopus, Web of Science, Cochrane Library, LILACS, and OpenGrey. Twenty-three articles met the inclusion criteria. Stationary stereophotogrammetry devices showed a mean accuracy that ranged from 0.087 to 0.860 mm, portable stereophotogrammetry scanners from 0.150 to 0.849 mm, and smartphones from 0.460 to 1.400 mm. Regarding the risk of bias assessment, fourteen papers showed an overall low risk, three articles had unclear risk and four articles had high risk. Although smartphones showed less performance on deep and irregular surfaces, all the analyzed devices were sufficiently accurate for clinical application. Internal depth-sensing cameras or external infrared structured-light depth-sensing cameras plugged into smartphones/tablets increased the accuracy. These devices are portable and inexpensive but require greater operator experience and patient compliance for the incremented time of acquisition. Stationary stereophotogrammetry is the gold standard for greater accuracy and shorter acquisition time, avoiding motion artifacts.

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Carr, Andrew J., Rosalind J. Jefferson, Alan R. Turner-smith, Itzhak Weisz, David C. Thomas, Tzanis Stavrakis, and Gregory R. Houghton. "Surface stereophotogrammetry of thoracic kyphosis." Acta Orthopaedica Scandinavica 60, no. 2 (January 1989): 177–80. http://dx.doi.org/10.3109/17453678909149248.

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Rasse, Michael, Gerald Forkert, and Peter Waldhäusl. "Stereophotogrammetry of facial soft tissue." International Journal of Oral and Maxillofacial Surgery 20, no. 3 (June 1991): 163–66. http://dx.doi.org/10.1016/s0901-5027(05)80008-6.

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Sawyer, Adam R., Marlene See, and Charles Nduka. "3D Stereophotogrammetry Quantitative Lip Analysis." Aesthetic Plastic Surgery 33, no. 4 (June 27, 2008): 497–504. http://dx.doi.org/10.1007/s00266-008-9191-1.

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Cappozzo, Aurelio, Ugo Della Croce, Alberto Leardini, and Lorenzo Chiari. "Human movement analysis using stereophotogrammetry." Gait & Posture 21, no. 2 (February 2005): 186–96. http://dx.doi.org/10.1016/j.gaitpost.2004.01.010.

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Chiari, Lorenzo, Ugo Della Croce, Alberto Leardini, and Aurelio Cappozzo. "Human movement analysis using stereophotogrammetry." Gait & Posture 21, no. 2 (February 2005): 197–211. http://dx.doi.org/10.1016/j.gaitpost.2004.04.004.

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Leardini, Alberto, Lorenzo Chiari, Ugo Della Croce, and Aurelio Cappozzo. "Human movement analysis using stereophotogrammetry." Gait & Posture 21, no. 2 (February 2005): 212–25. http://dx.doi.org/10.1016/j.gaitpost.2004.05.002.

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Della Croce, Ugo, Alberto Leardini, Lorenzo Chiari, and Aurelio Cappozzo. "Human movement analysis using stereophotogrammetry." Gait & Posture 21, no. 2 (February 2005): 226–37. http://dx.doi.org/10.1016/j.gaitpost.2004.05.003.

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Jayaratne, Yasas S. N., Curtis K. Deutsch, and Roger A. Zwahlen. "Stereophotogrammetry-Based Facial Depth Measurements." Surgical Innovation 21, no. 1 (February 18, 2013): 59–64. http://dx.doi.org/10.1177/1553350613475883.

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MORRIS, JAMES, NEIL CHAFETZ, SHELDON BAUMRIND, HARRY GENANT, and EDWARD L. KORN. "Stereophotogrammetry of the Lumbar Spine." Spine 10, no. 4 (May 1985): 368–75. http://dx.doi.org/10.1097/00007632-198505000-00014.

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Tondare, Vipin N., John S. Villarrubia, and András E. Vladár. "Three-Dimensional (3D) Nanometrology Based on Scanning Electron Microscope (SEM) Stereophotogrammetry." Microscopy and Microanalysis 23, no. 5 (September 18, 2017): 967–77. http://dx.doi.org/10.1017/s1431927617012521.

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AbstractThree-dimensional (3D) reconstruction of a sample surface from scanning electron microscope (SEM) images taken at two perspectives has been known for decades. Nowadays, there exist several commercially available stereophotogrammetry software packages. For testing these software packages, in this study we used Monte Carlo simulated SEM images of virtual samples. A virtual sample is a model in a computer, and its true dimensions are known exactly, which is impossible for real SEM samples due to measurement uncertainty. The simulated SEM images can be used for algorithm testing, development, and validation. We tested two stereophotogrammetry software packages and compared their reconstructed 3D models with the known geometry of the virtual samples used to create the simulated SEM images. Both packages performed relatively well with simulated SEM images of a sample with a rough surface. However, in a sample containing nearly uniform and therefore low-contrast zones, the height reconstruction error was ≈46%. The present stereophotogrammetry software packages need further improvement before they can be used reliably with SEM images with uniform zones.

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van Loon, B., N. van Heerbeek, T. J. J. Maal, W. A. Borstlap, K. J. A. O. Ingels, J. G. J. H. Schols, and S. J. Berge. "Postoperative volume increase of facial soft tissue after percutaneous versus endonasal osteotomy technique in rhinoplasty using 3D stereophotogrammetry." Rhinology journal 49, no. 1 (March 1, 2011): 121–26. http://dx.doi.org/10.4193/rhino10.056.

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BACKGROUND: When lateral osteotomies are performed as part of a rhinoplasty, the nose and paranasal region invariably change in three dimensions. The PURPOSE of this study is to compare the effect of the percutaneous perforating and endonasal continuous osteotomy techniques concerning the degree of postoperative swelling using three dimensional (3D) stereophotogrammetry. METHODOLOGY: A prospective follow-up study was conducted. Patients requiring bilateral osteotomies were included and randomly underwent a percutaneous osteotomy on one side and an endonasal osteotomy on the other side. Pre- and postoperative 3D photos were acquired using 3D stereophotogrammetry. Volumetric measurement data were acquired from the paranasal region using 3D software. Measurements were compared using Student`s t-test and Wilcoxon signed rank test statistics. RESULTS: Twenty patients were included. A percutaneous osteotomy was performed on the right side in nine patients and on the left side in 11 patients. The total volume, the volume of the right paranasal and left paranasal region were significantly larger postoperative. No difference was found between the sides. CONCLUSIONS: No difference concerning swelling is found between the percutaneous and endonasal osteotomy technique sides. With 3D stereophotogrammetry volumetric data can be acquired and compared to evaluate soft-tissue changes.

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Mai, Hang-Nga, and Du-Hyeong Lee. "The Effect of Perioral Scan and Artificial Skin Markers on the Accuracy of Virtual Dentofacial Integration: Stereophotogrammetry Versus Smartphone Three-Dimensional Face-Scanning." International Journal of Environmental Research and Public Health 18, no. 1 (December 30, 2020): 229. http://dx.doi.org/10.3390/ijerph18010229.

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This study evaluated the effects of different matching methods on the accuracy of dentofacial integration in stereophotogrammetry and smartphone face-scanning systems. The integration was done (N = 30) with different matching areas (n = 10), including teeth image only (TO), perioral area without markers (PN) and with markers (PM). The positional accuracy of the integrated models was assessed by measuring the midline linear deviations and incisal line canting between the experimental groups and laser scanner-based reference standards. Kruskal–Wallis and Mann–Whitney U tests were used for statistical analyses (α = 0.05). The PM method exhibited the smallest linear deviations in both systems; while the highest deviations were found in the TO in stereophotogrammetry; and in PN in smartphone. For the incisal line canting; the canting degree was the lowest in the PM method; followed by that in the TO and the PN in both systems. Although stereophotogrammetry generally exhibited higher accuracy than the smartphone; the two systems demonstrated no significant difference when the perioral areas were used for matching. The use of perioral scans with markers enables accurate dentofacial image integration; however; cautions should be given on the accuracy of the perioral image obtained without the use of markers.

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Brydon, G., D. M. Persaud, and G. H. Jones. "Planetary topography measurement by descent stereophotogrammetry." Planetary and Space Science 202 (August 2021): 105242. http://dx.doi.org/10.1016/j.pss.2021.105242.

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Kärrholm, Johan. "Roentgen stereophotogrammetry: Review of orthopedic applications." Acta Orthopaedica Scandinavica 60, no. 4 (January 1989): 491–503. http://dx.doi.org/10.3109/17453678909149328.

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Adams, L. P. "AN EXPERIMENT WITH ANALYTICAL SHADOW STEREOPHOTOGRAMMETRY." Photogrammetric Record 9, no. 54 (August 26, 2006): 835–47. http://dx.doi.org/10.1111/j.1477-9730.1979.tb00130.x.

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Allard, P., S. D. Nagata, M. Duhaime, and H. Labelle. "Estimation of ankle movements using stereophotogrammetry." Journal of Biomechanics 19, no. 6 (January 1986): 477. http://dx.doi.org/10.1016/0021-9290(86)90064-3.

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Ross, Hamish F. "A new comparator for SEM stereophotogrammetry." Scanning 8, no. 5 (1986): 216–20. http://dx.doi.org/10.1002/sca.4950080504.

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Koenig, G., W. Nickel, J. Storl, D. Meyer, and J. Stange. "Digital stereophotogrammetry for processing SEM Data." Scanning 9, no. 5 (1987): 185–93. http://dx.doi.org/10.1002/sca.4950090502.

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Mai, Hang-Nga, and Du-Hyeong Lee. "Effects of Artificial Extraoral Markers on Accuracy of Three-Dimensional Dentofacial Image Integration: Smartphone Face Scan versus Stereophotogrammetry." Journal of Personalized Medicine 12, no. 3 (March 18, 2022): 490. http://dx.doi.org/10.3390/jpm12030490.

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Recently, three-dimensional (3D) facial scanning has been gaining popularity in personalized dentistry. Integration of the digital dental model into the 3D facial image allows for a treatment plan to be made in accordance with the patients’ individual needs. The aim of this study was to evaluate the effects of extraoral markers on the accuracy of digital dentofacial integrations. Facial models were generated using smartphone and stereophotogrammetry. Dental models were generated with and without extraoral markers and were registered to the facial models by matching the teeth or markers (n = 10 in each condition; total = 40). Accuracy of the image integration was measured in terms of general 3D position, occlusal plane, and dental midline deviations. The Mann–Whitney U test and two-way analysis of variance were used to compare results among face-scanning systems and matching methods (α = 0.05). As result, the accuracy of dentofacial registration was significantly affected by the use of artificial markers and different face-scanning systems (p < 0.001). The deviations were smallest in stereophotogrammetry with the marker-based matching and highest in smartphone face scans with the tooth-based matching. In comparison between the two face-scanning systems, the stereophotogrammetry generally produced smaller discrepancies than smartphones.

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Cardoso, Hyngridhy Sanmay da Silva, and Gabriel Zorron Cavalcanti. "COMPARATIVE ANALYSIS OF THE THREEDIMENSIONAL RECONSTRUCTION OF FACIAL CT SCANS AND THEIR RESPECTIVE STEREOPHOTOGRAMMETRY." Journal of Contemporary Diseases and Advanced Medicine 2, no. 2 (August 30, 2023): 63–74. http://dx.doi.org/10.14436/jcdam.2.2.063-074.oar.

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The use of 3D technology has become important in the practice of surgeons, due to the limitations of 2D photographs. This is a prospective, analytical, and comparative study, which aims to analyze in a comparative way the three-dimensional reconstruction of two different systems, through computed tomography of the face and the respective stereophotogrammetry acquired from the same face. It was possible to reconstruct a total of 25 meshes from participants who underwent facial tomography and photogrammetry at the IPO Hospital. The study aims to describe the computerized technique of three-dimensional reconstruction of the face and mainly to evaluate the equivalence of the surface of the face obtained by two different techniques that propose the analysis of the anatomy. The first mesh was obtained by computed tomography. The second by the stereophotogrammetry technique, with capture performed by the clOner scanner and with the reconstruction of the mesh in the Reality Capture application. In addition, to demonstrate a three-dimensional facial evaluation system without ionizing radiation, low cost, and high availability. The results obtained were sufficient to demonstrate the equivalence between the meshes. Thus, stereophotogrammetry of the face is a new option for anatomical analysis of the face. It does not cause discomfort or risks to the patient and increases the possibilities of analysis.

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Gelman, R. N., and A. V. Nikitin. "Calibration of cameras at stereophotogrammetry close objects." Geodesy and Cartography 918, no. 12 (December 29, 2017): 54–58. http://dx.doi.org/10.22389/0016-7126-2016-918-12-54-58.

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Ge Wang, M. W. Skinner, J. T. Rubinstein, M. A. Howard, and M. W. Vannier. "Digital X-ray stereophotogrammetry for cochlear implantation." IEEE Transactions on Biomedical Engineering 47, no. 8 (2000): 1120–30. http://dx.doi.org/10.1109/10.855941.

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Hallert, B. "DETERMINATION OF THE ACCURACY OF AERIAL STEREOPHOTOGRAMMETRY." Photogrammetric Record 2, no. 9 (August 26, 2006): 204–18. http://dx.doi.org/10.1111/j.1477-9730.1957.tb01117.x.

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Salvia, P., S. Bouilland, R. Moletta, V. Sholukha, S. Van Sint Jan, and M. Rooze. "Three-dimensional shoulder kinematics by optoelectronic stereophotogrammetry." Journal of Biomechanics 39 (January 2006): S78. http://dx.doi.org/10.1016/s0021-9290(06)83199-4.

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Torrenti, J. M., J. Desrues, E. H. Benaija, and C. Boulay. "Stereophotogrammetry and Localization in Concrete under Compression." Journal of Engineering Mechanics 117, no. 7 (July 1991): 1455–65. http://dx.doi.org/10.1061/(asce)0733-9399(1991)117:7(1455).

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Valstar, E. R., F. W. de Jong, H. A. Vrooman, P. M. Rozing, and J. H. C. Reiber. "Model-based Roentgen stereophotogrammetry of orthopaedic implants." Journal of Biomechanics 34, no. 6 (June 2001): 715–22. http://dx.doi.org/10.1016/s0021-9290(01)00028-8.

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Zemčík, Robert, Jaroslava Karbanova, Vladimir Kalis, Libor Lobovský, Magdalena Jansová, and Zdenek Rusavy. "Stereophotogrammetry of the perineum during vaginal delivery." International Journal of Gynecology & Obstetrics 119, no. 1 (July 18, 2012): 76–80. http://dx.doi.org/10.1016/j.ijgo.2012.05.018.

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Selvik, Göran, Per Alberius, and Michael Fahiman. "Roentgen stereophotogrammetry for analysis of cranial growth." American Journal of Orthodontics 89, no. 4 (April 1986): 315–25. http://dx.doi.org/10.1016/0002-9416(86)90054-0.

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Romps, David M., and Ruşen Öktem. "Observing Clouds in 4D with Multiview Stereophotogrammetry." Bulletin of the American Meteorological Society 99, no. 12 (December 2018): 2575–86. http://dx.doi.org/10.1175/bams-d-18-0029.1.

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AbstractNewly installed stereo cameras ringing the Southern Great Plains (SGP) Atmospheric Radiation Measurement (ARM) site in Oklahoma are providing a 4D gridded view of shallow clouds. Six digital cameras have been installed in pairs at a distance of 6 km from the site and with a spacing of 500 m between cameras in a pair. These pairs of cameras provide stereoscopic views of shallow clouds from all sides; when these data are combined, they allow for a complete stereo reconstruction. The result—the Clouds Optically Gridded by Stereo (COGS) product—is a 4D grid of cloudiness covering a 6 km × 6 km × 6 km cube at a spatial resolution of 50 m and a temporal resolution of 20 s. This provides a unique set of data on the sizes, lifetimes, and life cycles of shallow clouds. This type of information is critical for developing cloud macrophysical schemes for the next generation of weather and climate models.

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Murphy, Norman, Paul Allard, Hubert Labelle, and Morris Duhaime. "Ankle and subtalar joint kinematics using stereophotogrammetry." Journal of Biomechanics 21, no. 10 (January 1988): 859. http://dx.doi.org/10.1016/0021-9290(88)90041-3.

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Catherwood, T. E., J. A. Winder, S. A. McIntosh, and R. J. Winder. "3D stereophotogrammetry: post-processing and surface integration." Imaging Science Journal 63, no. 2 (December 2, 2014): 95–102. http://dx.doi.org/10.1179/1743131x14y.0000000093.

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Weber, V. L., and L. S. Dolin. "On Stereophotogrammetry of a Perturbed Sea Surface." Radiophysics and Quantum Electronics 62, no. 2 (July 2019): 99–107. http://dx.doi.org/10.1007/s11141-019-09957-y.

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Liu, Jinhua, Alexander C. Rokohl, Yongwei Guo, Senmao Li, Xiaoyi Hou, Wanlin Fan, Maxim Formuzal, Ming Lin, and Ludwig M. Heindl. "Reliability of Stereophotogrammetry for Area Measurement in the Periocular Region." Aesthetic Plastic Surgery 45, no. 4 (January 15, 2021): 1601–10. http://dx.doi.org/10.1007/s00266-020-02091-5.

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AbstractThree-dimensional (3D) stereophotography area measurements are essential for describing morphology in the periocular region. However, its reliability has not yet been sufficiently validated. The objective of this study was to evaluate the reliability of 3D stereophotogrammetric area measurements in the periocular region. Forty healthy volunteers had five flat paper objects placed at each of the seven periocular positions including the endocanthion and the upper medial, upper middle, upper lateral, lower medial, lower middle, and the lower lateral eyelid. Two series of photographic images were captured twice by the same investigator. Each image of the first series was measured twice by the same rater, while images of both series were measured once by a second rater. Differences between these measurements were calculated, and the intrarater, interrater, and intramethod reliability was evaluated for intraclass correlation coefficients (ICCs), mean absolute differences (MADs), technical errors of measurements (TEMs), relative errors of measurements (REMs), and relative TEM (rTEM). Our results showed that 21.2% of all ICCs were considered as excellent, 45.5% were good, 27.3% were moderate, and 6.1% were poor. The interrater ICC for the endocanthion location was 0.4% on a low level. MAD values for all objects were less than 0.3 mm2, all TEM were less than 1 mm2, the REM and rTEM were less than 2% for all objects, showing high reliability. 3D stereophotogrammetry is a highly reliable system for periocular area measurements and may be used in the clinical routine for planning oculoplastic surgeries and for evaluating changes in periocular morphology.Level of Evidence IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.

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Silva, Ana Maria Bettoni Rodrigues da, Laís Valencise Magri, Álvaro Augusto Junqueira Júnior, and Marco Antônio Moreira Rodrigues da Silva. "3D stereophotogrammetry facial analysis of Angle I subjects: gender comparison." Revista de Odontologia da UNESP 44, no. 3 (June 2015): 137–42. http://dx.doi.org/10.1590/1807-2577.0039.

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Objective The aim of this study was to establish reference parameters for facial analysis in subjects with Angle’s Class I occlusion by means of stereophotogrammetry, comparing men and women. Material and method Twenty-six healthy young adults with Angle’s Class I occlusion volunteered to participate in the study, 15 males and 11 females, ages between 18 and 30 years old (22 years ± 5). These subjects were clinically examined to verify their type of occlusion. Twenty-five landmarks were performed in soft tissue, and those subjects underwent image capturing by the stereophotogrammetry technique, using the apparatus Vectra (M3-Canfield®). The following variables were measured in those images: naso-labial angle (C-Sn-Ls); (N-Prn-Pg); (N-Sn-Pg); mentolabial (Li-Ps-Pg); growth angle (T-Go-Pg), cheek area (T, Zy, Chk, Ch, Gn, Go), hemifaces' areas (T, Zy, Ft, Tr, N, Prn, C, Sn, Ls, Sto, Li Ps, Gn, Go), lip area, bilaterally (Ls, Cph, Ch, Li, Sto), and linear measurements of the lips and jaw. Result and conclusion The data were compared between genders (Student's t-test), and no statistically significant differences between groups (p>0.05) were found. Despite the limitations of this study, it is possible to conclude that, as there were no differences between men and women for the studied variables (angular, linear, and area), the data of the total sample (Class I) should be used as reference parameters in future studies. Additionally, the 3D stereophotogrammetry technique has proven to be a new possibility for facial analysis, which might be employed in several areas of dentistry.

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Rossetti, Alberto, Marcio De Menezes, Riccardo Rosati, Virgilio F. Ferrario, and Chiarella Sforza. "The role of the golden proportion in the evaluation of facial esthetics." Angle Orthodontist 83, no. 5 (March 11, 2013): 801–8. http://dx.doi.org/10.2319/111812-883.1.

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ABSTRACT Objective: To demonstrate if one or more golden relationships between different measurements of the human face exist. Materials and Methods: To make our measurements, we used three-dimensional (3D) stereophotogrammetry, which has proved to be the “gold standard” in the field of facial anthropometry. We obtained 3D stereophotogrammetric facial acquisitions of 400 healthy young adult subjects, then had them scored by an Evaluation Jury. Each subject received an esthetic evaluation ranging from 0 to 40. Individuals with a score larger than 28 were considered very attractive (VA), and individuals with a score lower than 12 were considered not attractive (NA). Fifteen subjects per group were chosen by chance, with a final total group of 60 subjects: 15 VA males, 15 NA males, 15 VA females, and 15 NA females. For each subject, a set of facial distances was obtained from the stereophotogrammetric facial reconstruction, and 10 ratios were computed. The effects of sex and attractiveness were tested by analysis of variance. Additionally, Student's t-tests verified if the ratios were statistically different from the golden ratio. Results: For nine ratios, no significant effects of sex or attractiveness were found. Only the eye-mouth distance/height of the mandible ratio was significantly influenced by sex (P = .035) and attractiveness (P = .032). Seven out of 10 ratios were statistically different from the hypothetical value of 1.618, and only three of them were similar to the golden ratio. Conclusions: Ratios between 3D facial distances were not related to attractiveness. Most of the facial ratios were different from the golden ratio.

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Burke, P. H. "Serial Observation of Asymmetry in the Growing Face." British Journal of Orthodontics 19, no. 4 (November 1992): 273–85. http://dx.doi.org/10.1179/bjo.19.4.273.

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Three children suffering from facial asymmetry were observed annually using facial stereophotogrammetry before, during, and after their general skeletal adolescent growth spurt. Stereophotogrammetry allows accurate three-dimensional measurements between identifiable facial landmarks. Five pairs of bilateral parameters connecting external canthi and angles of the mouth to alae and tip of nose, and to each other, allowed a positive sign (right-side larger) or a negative (left-side larger) assessment of parameter asymmetry, Their total, taking sign into account, assessed mid-facial asymmetry. Serial observation showed that: (1) in patient no. 1 suffering from post-traumatic condylar hypoplasia, the facial asymmetry resolved; (2) in patient no. 2 suffering from unilateral facial hypoplasia, the asymmetry, which was severe, reduced with adolescence, but did not resolve; (3) in patient no. 3 suffering from fibro-osseous dysplasia of left maxilla, the asymmetry was reduced by surgery, but the full effects of the surgery were not measurable until over 1 year after operation: subsequently, the asymmetry began to increase again.

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Sabharwal and Guo. "Tracking the 6-DOF Flight Trajectory of Windborne Debris Using Stereophotogrammetry." Infrastructures 4, no. 4 (October 24, 2019): 66. http://dx.doi.org/10.3390/infrastructures4040066.

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: Numerous post-windstorm investigations have reported that windborne debris can cause costly damage to the envelope of buildings in urban areas under strong winds (e.g., during hurricanes or tornados). Thus, understanding the physics of debris flight is of critical importance. Previously developed numerical models describing debris flight physics have not been validated for the complex urban flow environment; such a validation requires experimentally measuring the debris flight trajectory in wind tunnel tests. In this context, this paper proposes a debris measurement algorithm using stereophotogrammetry. This algorithm aims to determine the six-degree-of-freedom (6-DOF) trajectory and velocity of flying debris, addressing the research gap, i.e., the lack of an algorithm/software for measuring three-rotational-DOF using stereophotogrammetry. This is a civil engineering problem, but computer graphics is the foundation to solve it. This paper focuses on the theoretical development of the algorithm. The developed algorithm can be readily implemented in modern wind tunnel experiments.

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Buitenhuis, Margje B., Reinoud J. Klijn, Antoine J. W. P. Rosenberg, and Caroline M. Speksnijder. "Reliability of 3D Stereophotogrammetry for Measuring Postoperative Facial Swelling." Journal of Clinical Medicine 11, no. 23 (November 30, 2022): 7137. http://dx.doi.org/10.3390/jcm11237137.

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This study aimed to determine the reliability of three-dimensional (3D) stereophotogrammetry as a measurement instrument for evaluating soft tissue changes in the head and neck area. Twelve patients received a bilateral sagittal split osteotomy (BSSO). Test and retest 3D photographs were captured within the first three postoperative weeks, and a reference 3D photograph was capture at three months postoperatively. Distance measurements, mean and root mean square of the distance map, and volume differences were obtained. Reliability of these parameters was assessed by intraclass correlation coefficients (ICCs), standard error of measurement (SEM), and smallest detectable change (SDC). All distance measurements had an ICC > 0.91, and the distance map parameters and volume differences showed ICCs > 0.89. The neck region presented the largest SEMs (5.09 mL) and SDC (14.1 mL) for the volume difference. In conclusion, 3D stereophotogrammetry is reliable for distance and volume measurements of soft tissues in patients after a BSSO advancement.

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Jakobsone, Gundega, Ville Vuollo, and Pertti Pirttiniemi. "Reproducibility of Natural Head Position assessed with stereophotogrammetry." Orthodontics & Craniofacial Research 23, no. 1 (October 2, 2019): 66–71. http://dx.doi.org/10.1111/ocr.12344.

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Dirven, Richard, Frans J. M. Hilgers, Joanneke M. Plooij, Thomas J. J. Maal, Stefaan J. Bergé, Gijsbertus J. Verkerke, and Henri A. M. Marres. "3D stereophotogrammetry for the assessment of tracheostoma anatomy." Acta Oto-Laryngologica 128, no. 11 (January 2008): 1248–54. http://dx.doi.org/10.1080/00016480801901717.

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Journal articles on the topic 'Stereophotogrammetry'

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