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.
Results
Showing 1 to 13 of 13 for “"Perspective Projection"”.
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Integrated 3D Analysis and Analysis Guided Synthesis
… from a variety of cues in monocular images under perspective projection. Second, we synthesize images that depict the estimated motion and structure.
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Generation of Orthogonal Projections from Sparse Camera Arrays
… a viewpoint at the middle of the screen. Any perspective projection used in this system will look distorted when standing at a different viewpoint. If an orthogonal projection is used, there will be no perspective distortion, and the image will look correct no matter where the viewer stands. …
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Polyhedra:representation and recognition
… dual spherical representation and the edge under perspective projection is proved. Sensor fusion using visual and tactile sensory inputs is proposed to improve recognition rates.
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Evaluation of Perspective and Coplanar Cockpit Displays of Traffic Information to Support Hazard Awareness in Free Flight
… a spatial-analog representation of altitude. Two perspective projection formats (one using a 30$\sp\circ$ viewing vector elevation angle, the other using a 60$\sp\circ$ viewing angle) provided integrated exocentric views of the airspace from above and behind the pilot's aircraft. The pilots were …
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Device independent perspective volume rendering using octrees
… a high-end graphics workstation. It produces a perspective projection of the volume, since perspective projections are generally easier to interpret than parallel projections. The algorithm uses progressive refinement to give the user a quick view of the dataset and how it is oriented. If a …
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Screen: The Intersectional Element of Architecture
… the screen’s mode of appearance. Namely, perspective projection, where it traces a series of fundamental notions relating to its logic that the screen now spatially demonstrates and utilises as logic for producing (the image of) space. It begins by positing perspective as being a logical …
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Ricketts Analysis Using Conventional and DolphinTM Generated CBCT Lateral Cephs
… lateral cephalograms, and DolphinTM generated perspective and orthogonal lateral cephalograms from CBCT (NewTom 5G; QR srl, Verona, Italy). Materials and Methods: A Sirona digital lateral cephalogram and DophinTM synthesized CBCT lateral cephalograms of a radiographic phantom in orthogonal and …
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Relative orientation with limited control in close range Photogrammetry
… close-range cameras is developed which combines perspective projection with geodetic observations of the lens system parameters. Thus a problem inherent in many camera calibration methods, namely the exact determination of the perspective centre, is largely overcome. Deformation characteristics …
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Vision and Radar Fusion for Identification of Vehicles in Traffic
… coordinates are mapped on the video frame using perspective projection map- ping. Then persistent radar objects are determined by analyzing their trajectory on video frames. When a radar object appears for three consecutive frames, its called a persistent object. A region of interest (ROI) around …
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Photometric stereo for micro-scale shape reconstruction
… is the development of an SNI method dealing with perspective distortion. The proposed SNI is performed on the image plane instead of on the target surface as did by orthographic SNI owing to the newly derived representation of surface normals. The motivation behind the representation is from the …
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Generic camera calibration for omnifocus imaging, depth estimation and a train monitoring system
… whose imaging model can represented by ideal perspective projection with small distortions due to lens shape (radial distortion) or misaligned lens-sensor configuration (decentering). In the first calibration method, we generalize pupil-centric imaging model to handle arbitrarily rotated …
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Object Detection and Tracking Using Uncalibrated Cameras
This thesis considers the problem of tracking an object in world coordinates using measurements obtained from multiple uncalibrated cameras. A general approach to track the location of a target involves different phases including calibrating the camera, detecting the object's feature points over …
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Vehicle detection and tracking using wireless sensors and video cameras
… minimization method is used to estimate the perspective transformation which project 3D points to 2D image points. Vehicle location estimates from three cameras are fused to form a single trajectory representing the vehicle motion. Experimental results using both sensors and cameras are …