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 20 of 32 for “"SAR images"”.
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Advanced methods for change detection in VHR multitemporal SAR images
… coverage and high quality of remotely sensed images acquired by Earth-orbiting satellites make such kind of data an ideal information source for change detection. Among the different kinds of Earth-observation systems, here we focus on Synthetic Aperture Radar (SAR). Differently from optical …
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Water Surfaces Detection from Sentinel-1 SAR Images using Deep Learning
<p>Nowadays, Synthetic Aperture Radar (SAR) images have been widely used in the industry and the scientific community for different remote sensing applications. The main advantage of SAR technology is that it can acquire images from nighttime since it does not require sunlight. Additionally, it can …
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Design and implementation of a parallel registration algorithm for SAR images
Registration of two or more images of the same scene is an important step in image processing that seeks to extract information not obtainable from one of the images in question. This process is required in many Engineering, Scientific and Medical applications. The accuracy of this step is crucial …
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Categorization of electromagnetic radiation scatterers by means of synthetic aperture radar (SAR) images
… are capable of providing very high resolution images of the Earth’s surface by means of Synthetic Aperture Radar (SAR) systems. SAR imaging is ideal to monitor dynamic processes on the Earth’s surface in a reliable, continuous and global way. A SAR system operates in the microwave region of the …
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Complex-valued SAR image compression : an approach for amplitude, phase, and gradient recovery
Compressing Synthetic Aperture Radar (SAR) images presents unique challenges due to the high dynamic range and inherent acquisition noise in the amplitude signal, as well as the noise-sensitive and limited information content in the phase signal. Traditional compression methods, such as JPEG and …
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Generalized gamma spatial ARMA conditional model for speckled data: theoretical developments and applications
… the study of conditional spatial ARMA models for SAR image data. First, we propose a conditional spatial ARMA model based on the generalized gamma distribution, which incorporates spatial correlation and accounts for the positive and asymmetric nature of SAR data. We derive the score vector, …
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A Framework for Assessing Lower-Bound Bearing Capacity of Sandy Coastal Sediments from Remotely Sensed Imagery
… both optical and synthetic aperture radar (SAR) images were collected at two sites: the Atlantic beach near the US Army Corps of Engineers Field Research Facility in Duck, North Carolina and three distinct sites located near Yakutat, Alaska (Cannon Beach, Ocean Cape, and Point Carrew). …
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Optimized techniques for real-time microwave and millimeter wave SAR imaging
… and millimeter wave synthetic aperture radar (SAR)-based imaging techniques, used for nondestructive evaluation (NDE), have shown tremendous usefulness for the inspection of a wide variety of complex composite materials and structures. Studies were performed for the optimization of uniform and …
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Surface deformation analysis over a hydrocarbon reservoir using InSAR with ALOS-PALSAR data
InSAR has been developed to estimate the temporal change on the surface of Earth by combining multiple SAR images acquired over the same area at different times. In the last two decades, in addition to conventional InSAR, numerous multiple acquisition InSAR techniques have been introduced, …
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SAR processing using PVM
… Machine) to improve the speed of processing a SAR (Synthetic Aperture Radar) image. A network of heterogeneous machines were set up as the basis of the parallel virtual machine. SAR processing software was written for testing the PVM. The software performed simplified range and azimuth …
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Discrimination of water from shadow regions on radar imagery using computer vision techniques
… of the intensity of water and shadow in an SAR image make the task of discriminating them extremely difficult. In this thesis, we analyze the reflectivity mechanism of water and shadow on radar imagery and describe a scene analysis system which consists of a texture preserving noise removal …
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Multi-stage processing for effective segmentation of SAR sea ice images
… other satellites were launched such as the TerraSAR, Sentinel-1 etc, which made possible to acquire High-Resolution imagery of remote areas such as the Arctic region. Consequently, with the accessibility to such large amounts of data, it becomes necessary to develop fast, robust and automated …
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ATREngine: An Orientation-Based Algorithm for Automatic Target Recognition
… ATR algorithms for 2-D Synthetic Aperture Radar (SAR) images. Prior work in ATR includes Chessa Guilas’ Hausdorff Probabilistic Feature Analysis Approach in 2005 and Daniel Cary’s Optimal Rectangular Fit in 2007.</p> <p>A system incorporating multiple modules performing different tasks is …
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Machine Learning and Data Fusion of Simulated Remote Sensing Data
… followed by simulated synthetic aperture radar (SAR) and infra-red (IR) images of these ship wakes. A parametric study across several different ocean environments and simulated remote sensing platforms is conducted to generate a preliminary data set that is used for training and testing neural …
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Synthetic Aperture Radar Imaging Simulated in MATLAB
… thesis projects with the goal of generating images using synthetic aperture radar (SAR) simulations coded in MATLAB. The project is supervised by Dr. John Saghri and sponsored by Raytheon Space and Airborne Systems. SAR is a type of imaging radar in which the relative movement of the antenna …
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The Effects of Automation Expertise, System Confidence, and Image Quality on Trust, Compliance, and Performance
… targets in simulated synthetic aperture radar (SAR) images. Participants reported whether a target was present or absent, their decision-confidence, and their trust in the diagnostic system's advice. Results indicated that system confidence and automation expertise influenced automation trust, …
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Noise and Degradation Reduction for Signal and Image Processing via Non-adaptive Convolution Filtering
… noise and degradations more effectively in both SAR images and synthetic vibration data than the competing filters. It will show higher IQ scores, greater computational efficiency in target detection, and significant improvement in signal restoration of simulated vibration data.
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Three-Dimensional Target Modeling with Synthetic Aperture Radar
Conventional Synthetic Aperture Radar (SAR) offers high-resolution imaging of a target region in the range and cross-range dimensions along the ground plane. Little or no data is available in the range-altitude dimension, however, and target functions and models are limited to two-dimensional …
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Non-invasive microwave and millimeter wave reflectometry and imaging for human skin diagnosis and materials characterization
… wave reflectometry and synthetic aperture radar (SAR) imaging techniques have been successfully applied in many applications, such as nondestructive testing and evaluation (NDT&E), security inspection and medical diagnosis. In this dissertation, the feasibility of using microwave and millimeter …
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