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 11 of 11 for “"Vanishing points"”.
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Detection and tracking of vanishing points in dynamic environments : Detección y seguimiento de puntos de fuga en entornos dinámicos
… thesis is about the detection and tracking of vanishing points in images, its application to rectification of planes, and the additional considerations that the road scenario imposes on these topics. The core element of the dissertation is the obtention of vanishing points, for which a number …
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3D ENDOSCOPY VIDEO GENERATED USING DEPTH INFERENCE: CONVERTING 2D TO 3D
… in the endoscopy images in order to locate the vanishing point(s). The second cue is the presence of ridge-like structures in the in-vivo images of the endoscopy image sequence. Edge detection is used to map these ridge-like structures into concentric ellipses with their common center at the …
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3D reconstruction and camera calibration from 2D images
… a special plane in projective space by means of vanishing points. Camera calibration forms part of the third step in obtaining the metric geometry, from which it is possible to obtain a 3D model of the scene. The advantage of this system is that the stereo images do not need to be calibrated in …
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Autonomous Vehicle Control using Image Processing
… on the pixel intensity profile and the other on vanishing points in the image plane. For the control algorithm itself, two designs are introduced as well: a simple classical P-control and a control scheme based on H-Infinity. The design and testing of this autonomous vehicle system are performed …
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Girard Desargues, the architectural and perspective geometry: a study in the rationalization of figure
… his system of perspective construction without vanishing points beyond the picturespace. Desargues' theorem and other key discoveries for which he is still known in the history of mathematics are discussed as they bear upon his methods of stereotomy and perspective. Desargues' stereotomy is …
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A projective approach to computer-aided drawing
… description. This representation is based on points that lie on the surface of a unit sphere centered at the viewpoint. It allows drawings to be composed with the same ease as traditional illustrations, while providing many of the advantages of a three-dimensional model. I describe a range of …
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Vision-Assisted Control of a Hovering Air Vehicle in an Indoor Setting
… methods of using image processing to determine vanishing points in a hallway are demonstrated. The more promising of the two uses a Hough transform to detect lines in the image and forms a histogram of the intersections to detect likely vanishing point candidates. Once the vanishing point is …
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Learning Monocular Cues in 3D Reconstruction
… monocular cues -- e.g. texture gradients and vanishing points -- allow us to build a plausible 3D reconstruction of the scene. The goal of this thesis is to propose new techniques to learn monocular cues and demonstrate how they can be used in various 3D reconstruction tasks. We take a …
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Multiple View Geometry For Video Analysis And Post-production
… single view methods typically require multiple vanishing points, and therefore would fail when only one vanishing point is available. In addition, current multiple view techniques, making use of either epipolar geometry or trifocal tensor, do not exploit fully the properties of constant or known …
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3D spatial layout and geometric constraints for scene understanding
An image is nothing but a projection of the physical world around us, where objects do not occur randomly but follow certain spatial rules. Many existing computer vision approaches tend to ignore this aspect of understanding images. In this work, we build representations and propose strategies for …
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Robust Video Object Tracking via Camera Self-calibration
… include noise reduction for the estimation of vanishing points, the relaxation of assumptions on unknown camera parameters, and radial distortion correction. We propose a novel framework for camera self-calibration and automatic radial distortion correction. Our approach starts with a …