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 “"range images"”.
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Robust recovery of piled box-like objects in range images
… moving the robotic hand along the pallet, and a range image is acquired. Secondly, the image is analyzed and the graspable objects in the pile are localized. Thirdly, the robot grasps the recovered objects from their exposed surfaces and places them at a user defined position. This procedure is …
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Integration of range images from multiple viewpoints into a particle database
Thesis (M.S.V.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1989.
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Feature extraction for range image interpretation using local topology statistics
This thesis presents an approach for interpreting range images of known subject matter, such as the human face, based on the extraction and matching of local features from the images. In recent years, approaches to interpret two-dimensional (2D) images based on local feature extraction have …
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Real-time Realistic Rendering And High Dynamic Range Image Display And Compression
… light transport computation. Unfortunately, the images resulting from Monte Carlo approaches generally suffer from visually unacceptable noise artifacts. The result of any light transport simulation is, by its very nature, an image of high dynamic range (HDR). This leads to the issues of the …
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Extraction of 3D Object Representations from a Single Range Image
… computer model of 3D solid objects from a single range image. This research has many real world applications, including robotic environments and the inspection of industry parts. The most common methods for 3D-object extraction are based on stereo reconstruction and structured light analysis. The …
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Assessing High Dynamic Range Imagery Performance for Object Detection in Maritime Environments
… study proposes the introduction of high dynamic range cameras on autonomous surface vessels because these cameras capture images at different levels of exposure revealing more detail than fixed exposure cameras. To see if this introduction will be beneficial for autonomous vessels this research …
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Application of the backward-smoothing extended Kalman filter to attitude estimation and prediction using radar observations
… from a sequence of discrete-time radar images. The raw range-Doppler returns are collected using a ground-based sensor, which is owned and operated by the SSAG, and processed into a set of range/cross-range images. A three-dimensional geometric model is, through computer graphics …
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Shape, motion, and inertial parameter estimation of space objects using teams of cooperative vision sensors
… space targets, using information gathered from range imaging sensors. The method exploits two key features of this application: (1) the dynamics of targets in space are highly deterministic and can be accurately modeled; and (2) several sensors will be available to provide information from …
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3D Deep Learning for Object-Centric Geometric Perception
… that could be directly retrieved from multi-view images, depth scans, or LiDAR range images. Different challenges exist in achieving object-centric geometric perception, such as achieving a fine-grained geometric understanding of common articulated objects with multiple rigid parts, learning …
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Situational Awareness of a Ground Robot From an Unmanned Aerial Vehicle
… A method for detecting utility cables in 3D range images is presented. This technique finds areas of an image that represent edges in 3D space, and uses the Hough transform to find those edges that take the shape of lines, indicating potential utility cables. A mission plan for stereo image …
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Image-based Material Editing
Photo editing software allows digital images to be blurred, warped or re-colored at the touch of a button. However, it is not currently possible to change the material appearance of an object except by painstakingly painting over the appropriate pixels. Here we present a set of methods for …
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Data Driven Selective Sensing for 3D Image Acquisition
… well established that acquiring large amounts of range data with vision sensors can quickly lead to important data management challenges where processing capabilities become saturated and pre-empt full usage of the information available for autonomous systems to make educated decisions. While …
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A line photogrammetry algorithm for 3D rectilinear object reconstruction
… line in space using two or more oriented images of that line. The algorithm presented is intended for object reconstruction and is motivated by the need to reconstruct man-made objects in urban areas, such as buildings and the industrial inspection arena. The method aims to obtain a …
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Accelerating point cloud cleaning
… can produce thousands of high resolution range scans. These must be cleaned to remove unwanted artefacts. We identified three areas that can be improved upon in order to accelerate the cleaning process. Firstly the speed at which the a user can navigate to an area of interest has a direct …
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Metamaterials for Computational Imaging
… metaimager capable of collecting two-dimensional images, and then a two-dimensional metaimager capable of collecting two-dimensional images. The imaging results for the one-dimensional metaimager are presented including two-dimensional (azimuth and range) images of point scatters, and video-rate …
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Visibility metrics and their applications in visually lossless image compression
… can detect differences between a pair of images. These metrics can provide localized information in the form of visibility maps, in which each value represents a probability of detection. An important application of the visibility metric is visually lossless image compression that aims at …
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Analysing and Enhancing the Coarse Registration Pipeline
… This dissertation aims to coarsely register range images or point-clouds of a priori unknown pose by matching their overlapping regions. Using spherical harmonics to correlate normals in a coarse registration pipeline has been shown previously to be an effective means for registering …