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 7 of 7 for “"Projection onto convex sets"”.
-
Digital pre-compensation for faulty D/A converters : the "missing pixel" problem
… we develop is an iterative solution in class of projection-onto-convex-sets. We develop the algorithm and prove that it converges to the optimal solution found using constrained minimization. Each of the three strategies are analyzed and results from numerical simulations are presented.
-
POCS Augmented CycleGAN for MR Image Reconstruction
… with a traditional data reconstruction method: Projection Onto Convex Sets (POCS). Experiments were then performed to evaluate the method by comparing it to several existing state-of-the-art methods. Our results demonstrate that the proposed method outperformed the current state-of-the-art in …
-
Implementation of Iterative Reconstruction of Images from Multiple Bases Representations
… by MBR compression using a Recursive Residual Projection algorithm. This algorithm is a sub-optimal method to find the best basis vector subset for representing images based on multiple orthogonal bases. The MBR distorted images are reconstructed by the iterative method of Projection onto …
-
Approximate signal reconstruction from partial information
… coding that uses a single basis. The method of Projection Onto Convex Sets (POCS) is used to reconstruct an approximation to the MBR signal using the side information. Thus, any number of constraints may be used as long as they form closed and convex sets and the side information is a priori …
-
Assessing the uncertainties of Radar and LiDAR derived digital elevation information over static and dynamic terrain
… signal causing data losses. To fill these gaps, Projection onto Convex Sets is employed to interpolate between known elevation locations using the known properties of the elevation profiles in the region. Understanding these dynamic processes from satellite observations allows us to address …
-
Measurement of three-dimensional coherent fluid structure in high Reynolds number turbulent boundary layers
… of topology and coherent fluid structures. Using Projection Onto Convex Sets, a framework for post-processing operators is implemented which includes a divergence minimisation procedure and a scale-limited denoising strategy which is resilient to 'false' vectors contained in the data. Finally, …
-
Development of Novel Cardiac CT Methods
… reconstruction, we also developed an extended projection onto convex sets (POCS) based method and studied the contributions of individual constraints. Using the compressive sensing theory, it has recently become possible to reconstruct a piece-wise constant ROI using interior tomography. The …