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 20 of 73 for “"Camera Calibration"”.
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Depth camera calibration using depth measurements
… field is the emergence of low cost depth cameras that measure the scalar distance between the objects present in the scene and the cameras. These cameras project infra-red rays and use time of flight to measure the distance at each pixel. These cameras have the potential to significantly …
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Underwater Refractive Camera Calibration and 3D Scene Reconstruction
… of unmanned vehicles equipped with waterproof camera-light systems. Despite prior research addressing related challenges, these tasks remain challenging due to two key issues: (1) geometric distortions caused by distance-dependent light refraction when the light rays travel through the housing …
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3D reconstruction and camera calibration from 2D images
… 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 order to obtain a …
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Wide-angle Lens Camera Calibration using Automatic Target Recognition
The focus of this thesis is the calibration and integration of the Ladybug5 multi-camera system into a Mobile Mapping System. To calibrate this system an efficient and accurate automatic target recognition methodology that could work with a multi-camera system was needed. This automatic target …
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Simultaneous camera calibration and pose estimation from multiple views
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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Structure and camera calibration from active correspondence of lines and intersection points
… it from various views. We built Biclops, a two camera directed vision system. Each camera is mounted on a Pan-Tilt unit which can be independently controlled. Biclops is built as a tool so that it can be picked up by an industrial robot. This eye in hand system is used to find the structure of …
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Generic camera calibration for omnifocus imaging, depth estimation and a train monitoring system
… state-of-the-art geometric and photometric camera calibration. The calibration parameters are then applied as input to new algorithms in omnifocus imaging, 3D scene depth from focus and machine vision based intermodal freight train analysis. In the first prat of this dissertation, we present …
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Enhancement of image recognition in digital close-range photogrammetry using mathematical equations and camera calibration
… technique via mathematical modelling and camera callibration are becoming an interesting area in reverse engineering to describe relationships between spatial objects in various applications. It has been used as an alternative solution to conventional methods for generation of virtual 3D …
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Shape from inconsistent silhouette: Reconstruction of objects in the presence of segmentation and camera calibration error
… such as the presence of silhouette and camera calibration error. This problem is called the Shape from Inconsistent Silhouettes problem. A psuedo-Boolean cost function is formalized for this problem, which penalizes differences between the reconstruction images and the silhouette images, …
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Virtual Environment Creation and Camera Calibration for Soft Target Identification and Assistance in Crowded Spaces with a Sensor Network and a Robotic Dog
… large public venue, a network of surveillance cameras monitoring the area, and humans in the environment. The thesis work focuses on the exploration of the following two parts: (1) Calibrating Multiple Camera Feeds Using the Mobile Robotic Dog Spot; (2) Building 3D Live Virtual Environments in …
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Calibrating Video Capture Systems To Aid Automated Analysis And Expert Rating Of Human Movement Performance
… for calibrating the activity space and the cameras involved in video capture systems for upper extremity stroke rehabilitation. We discuss an in-home stroke rehabilitation system called Semi-Automated Rehabilitation At Home System (SARAH) and a clinic-based system called Action Research Arm …
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Object Detection and Tracking Using Uncalibrated Cameras
… 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 frames, tracking the object over frames and analyzing object's motion and behavior. …
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An optimized data reduction technique in photogrammetry
… problems of non-metric photography not having camera calibration information or fiducial marks for transformation of measured comparator coordinates to image coordinates, it was extremely limited in blunder detection capabilities and required an inordinately large number (six) of control points …
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National Ocean Service stellar calibration procedure for the large format camera
The Large Format Camera is a high resolution wide-angle mapping camera. It will be carried into orbit as a payload in the Shuttle Orbiter vehicle's cargo bay. A mapping camera must be calibrated to determine precise values for its elements of interior orientation. The Large Format Camera was …
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Augmenting complex surfaces with projector-camera systems
… practical approach embodied in a projector-camera system. Our system is constructed of low-cost, commodity hardware and demonstrates some of the exciting applications of Spatial Augmented Reality. We present a novel initial homography estimation for interactive projector-camera calibration. …
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Real-Time Forward Urban Environment Perception for an Autonomous Ground Vehicle Using Computer Vision and LIDAR
… and obstacle locations, using a single camera and LIDAR scanner. A road/non-road binary mask is first segmented. From the road information in the mask, the current traveling lane of the vehicle is detected using a minimum distance transform and tracked between frames. The stop lines and …
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High-Fidelity Image -Based Modeling
… static scene reconstruction, high-fidelity camera calibration, and dynamic scene reconstruction. For static scene reconstruction, we propose two novel multi-view stereo algorithms. In the first algorithm, after building a visual hull model purely from geometric constraints associated with …
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Development of MiST-IR : multi-spectral infrared thermography
… involving the use of a high-speed infrared camera to collect visual data. By analyzing the data with both qualitative and quantitative tools, insights into boiling heat transfer mechanisms can be gained. In addition to the MiST technique, a refined infrared camera calibration model is …
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Relative orientation with limited control in close range Photogrammetry
… established by means of space intersection and a camera calibration method for 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 …
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Three-dimensional particle tracking velocimetry study of marine organism wake behavior
… to the correct methods of system setup, camera calibration, and processing. This thesis aims to develop an optimal system setup for the use of 3D-PTV for studying flow behavior in the wakes of marine organisms. Previous studies have been limited by the restrictions of other flow …
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