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 17 of 17 for “"fisheye"”.
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Improving memorability in fisheye views
Interactive fisheye views use distortion to show both local detail and global context in the same display space. Although fisheyes allow the presentation and inspection of large data sets, the distortion effects can cause problems for users. One such problem is lack of memorability – the ability to …
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Significance of omnidirectional fisheye cameras for feature-based visual SLAM
… degrees. However, cameras with omnidirectional fisheye lenses can see much more of their surroundings, which suggests they may be beneficial for the visual SLAM task; this hypothesis is supported by the trend that recent commercial products that rely on robust visual navigation use fisheye …
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Design and implementation of fisheye routing protocol for mobile ad hoc networks
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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An Evaluation of an Omni- Directional (Fisheye) Vision Sensor for Estimating the Pose of an Object,
… To generate precise pose information from a fisheye camera, the unified/ generic model is employed. The model is utilized to define the geometry of the camera. Omni-directional images captured are remapped to construct perspective images. A callback function for a mouse click event is …
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Wide-angle Lens Camera Calibration using Automatic Target Recognition
… as either a central perspective camera or as a fisheye camera. Calibrations were performed on both camera systems using both central perspective and fisheye projection models. The calibrations that utilized a fisheye projection model estimated calibration parameters that more closely fit the …
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Omnidirectional obstacle detection using minimal sensing
… is achieved by fitting each camera with a fisheye lens whose field of view is significantly greater than 180 degrees. The combined field of view of the cameras is omnidirectional, and may be conceptually subdivided into three regions: the monocular portions of each camera (centered at the …
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Liquid lens beam steering and environmental testing for the miniature optical steered antenna for inter-satellite communication
… in the other axis, creates 2D steering. A fisheye lens can then amplify the steering cone to full hemispherical coverage [1].
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Soft, round, high resolution tactile fingertip sensors for dexterous robotic manipulation
… procedures in the form of developing a fisheye projection model, and developing a neighborhood and location based continuous look-up table to map the relationship between RGB value and surface normal orientation of the membrane at a point. Finally we perform two dexterous manipulation …
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Computational bounce flash for indoor portraits
… rotate the flash head, and additional sensors (a fisheye and 3D sensors) to gather information about potential bounce surfaces. We present a simple numerical optimization criterion that finds directions for the flash that consistently yield compelling illumination and demonstrate the effectiveness …
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Geometrische und stochastische Modelle für die integrierte Auswertung terrestrischer Laserscannerdaten und photogrammetrischer Bilddaten
… Rotationszeilen-Panoramakameras oder Kameras mit Fisheye-Objektiv an, weil diese im Vergleich zu zentralperspektiven Kameras deutlich größere Winkelbereiche in einer Aufnahme abbilden können. Grundlage für die gemeinsame Auswertung terrestrischer Laserscanner- und photogrammetrischer Bilddaten ist …
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Stochastic constraints for vision-aided inertial navigation
… using high-quality synthetic data and real fisheye imagery.
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Towards a Strawberry Harvest Prediction System Using Computer Vision and Pattern Recognition
… specific to images captured via drone, such as fisheye distortion and dirt masking, are examined and mitigated. Using thresholding, the nRGB color space is shown to be the most promising for image segmentation of red strawberries. Data from field 25 at the Cal Poly Strawberry Center is …
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Development of a Peripheral-Central Vision System to Detect and Characterize Airborne Threats
… a ``peripheral vision'' camera (with a fisheye lens) provides a large field-of-view while a ``central vision'' camera (with a perspective lens) provides high resolution imagery of a specific object. This pair form a heterogeneous stereo vision system that can support range resolution. A …
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Developing an accurate close-range photogrammetric technique for extracting 3D information from spherical panoramic images
… removal of distortions from images acquired from fisheye lenses as well as an algorithm, here referred to as the Minimum Ray Distance (MRD), for the fully automated approximate relative orientation of spherical panoramic images. The bundle adjustment algorithm was then applied to refine the …
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Interactive rendering techniques for focus+context visualization of 3D geovirtual environments
… spherical projections, as well as multi-focal 3D fisheye-lenses and the combination of planar and non-planar projections. • The rendering technique for view-dependent multi-perspective views of 3D geovirtual environments, based on the application of global deformations to the 3D scene geometry, …
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Development of an Active Vision System for the Remote Identification of Multiple Targets
This thesis introduces a centralized active vision system for the remote identification of multiple targets in applications where the targets may outnumber the active system resources. Design and implementation details of a modular active vision system are presented, from which a prototype has been …
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Supporting Spatial Collaboration: An Investigation of Viewpoint Constraint and Awareness Techniques
Spatial collaboration refers to collaboration activities involving physical space. It occurs every day as people work together to solve spatial problems, such as rearranging furniture or communicating about an environmental issue. In this work, we investigate how to support spatial collaboration …