Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"stereophotogrammetry"”.
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Automated stereophotogrammetry
The principle function of any automated stereophotogrammetry algorithm is to identify corresponding points in the stereo pair. In the present approach the widely known technique of successive refinement of parallax based on hierarchical coarse-to-fine resolution steps is used. To eliminate the …
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An investigation into the use of stereophotogrammetry for the analysis of craniofacial dysmorphology in schizophrenia
… project aimed to investigate the ability of a stereophotogrammetry system to detect craniofacial dysmorphology in individuals diagnosed with schizophrenia. Furthermore, observed dysmorphology was characterised and compared with that found in previous studies. Three-dimensional craniofacial …
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THREE-DIMENSIONAL FACIAL ANTHROPOMETRY
… providing a reliable and fast analysis. Stereophotogrammetry is a promising method of soft-tissue evaluation that allows reliable analysis of craniofacial deformities, providing fundamental parameters to plan and evaluate dental treatments and maxillofacial surgery, so improving the …
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3D approximation of scapula bone shape from 2D X-ray images using landmark-constrained statistical shape model fitting
… statistical shape model fitting. First, X-ray stereophotogrammetry was used to reconstruct the 3D coordinates of points located on 2D X-ray images of the scapula, acquired from two perspectives. A suitable calibration frame was used to map the image coordinates to their corresponding 3D …
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Interlandmark measurements from lodox statscan images with application to femoral neck anteversion assessment
… Lodox Statscan digital radiography system. X-ray stereophotogrammetry was applied to Statscan images to enable three-dimensional point localization for inter-landmark measurement using two-dimensional radiographs. This technique requires images of the anatomical region of interest to be acquired …
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Exploration of Motion Capture System to Investigate Human Shoulder Kinematics
… techniques, including cadaver studies, stereophotogrammetry, and motion capture (MOCAP) systems. Despite increased interest in wearable technology within human movement analysis, the problem of COR estimation employing MOCAP systems and its validation against bi-planar fluoroscopy …
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Three-dimensional assessment of dentofacial deformity in children with clefts
… as young as 3 years of age using computerised stereophotogrammetry; preliminary, objective, three-dimensional analysis of facial function has been completed in young children; the accuracy of three-dimensional CT scanning of dentate study models and the time cost of data collection were …
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Comparing Nasolabial Measures Using Casts and Facial Scans
… in infants with cleft. KEY WORDS: cleft, nose, stereophotogrammetry, cast, infant.
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Are post-treatment orthognathic patients attractive? A three-dimensional study
… used two-dimensional photographs. Using a 3D stereophotogrammetry system to capture images presented in a 3D configuration is probably a more realistic method to replace the actual patient. The overall aim of the present study was to compare, using angular and linear measurements, 3D facial …
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Automated visual measurement of body shape in scoliosis.
… through practical research in the laboratory. Stereophotogrammetry, phase stepping profilometry, optical scanning and raster pattern contouring are investigated through consideration of theory and literature review. However, none of these approaches is found to be free from limitations. The …
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Semi-Dense Stereo Reconstruction from Aerial Imagery for Improved Obstacle Detection
… projected into a sparse cloud of 3D points using stereophotogrammetry for ICP registration to estimate the rigid transformation between frames. The RTK-GPS constrained pose estimate from the UAV is fused with the feature matched estimate to align the reconstruction and eliminate drift. The …
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An investigation into the geomorphology of the Hebron Fault, Namibia, using a satellite-derived, high-resolution digital elevation model (DEM)
… Digital Elevation Model (DEM) via stereophotogrammetry using pan-sharpened Worldview-3 satellite imagery (0.31 m resolution). The DEM was used for several geomorphological analyses. These included measuring the scarp height at 160 locations along its length, measuring river channel …
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Magnitude and reproducibility of smiling in 12-year-old Caucasian children in the Republic of Ireland: a comparison of Class I and Class II malocclusions
Aims:• To determine if malocclusion (Class I, Class II division 1 and Class II division 2) influences the magnitude, the immediate intra-session and the short-term inter-session reproducibility of the rest position to posed smile and the rest position to maximal smile. • To determine if gender …
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Predicting Outcomes in Patients with Diabetic Foot Ulcers
… a prototype device that uses the principles of stereophotogrammetry to provide a 3-dimensional assessment of wounds. The study showed that the WoundVue® camera is capable of providing accurate and reproducible wound measurements and it has the potential to be a valuable adjunct in diabetic foot …
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THREE-DIMENSIONAL ASSESSMENT OF THE EFFECTS OF EXTRACTION ON THE SMILE IN CLASS II HIGH AND LOW MANDIBULAR PLANE ANGLE PATIENTS
The annals of orthodontics are filled with studies aimed to understand how extraction orthodontic treatment might change the face. Although many studies have addressed profile changes due to extraction treatment, fewer studies have focused on how extractions change a patients smile. With the advent …
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Applications of Close-Range Terrestrial 3D Photogrammetry to Improve Safety in Underground Stone Mines
The underground limestone mining industry is a small, but growing segment of the U.S. crushed stone industry. However, its fatality rate has been amongst the highest of the mining sector in recent years due to ground control issues related to ground collapses. It is therefore important to improve …