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 31 for “"superresolution"”.
-
SUPERRESOLUTION PHOTONICS
This thesis presents methods to improve imaging beyond the diffraction limit. Methods presented include spatial mode demultiplexing as well as image processing algorithms like Center of Gaussians.
-
Multiframe Superresolution Techniques For Distributed Imaging Systems
Multiframe image superresolution has been an active research area for many years. In this approach image processing techniques are used to combine multiple low-resolution (LR) images capturing different views of an object. These multiple images are generally under-sampled, degraded by optical and …
-
Imaging nanoscale pollen morphology with Superresolution Structured Illumination Microscopy
… work compared to optical microscopy. Superresolution Structured Illumination Microscopy (SR-SIM) is an emerging method that presents a powerful, non-destructive, and optically-sectioned way of imaging pollen that avoids certain disadvantages of electron microscopy. We examined and …
-
Fast superresolution based on a network structure trained using sparse coding
In this thesis I present a novel approach to superresolution using a network structure. Sparse representation of image signals forms the cornerstone of our approach and the goal is to obtain resolution enhancement of the low resolution images. I will discuss various dictionary learning methods and …
-
Applications of U-net to diffuse optical tomography data: Image reconstruction and superresolution
… possible solutions to image reconstruction and superresolution problems in the DOT brain imaging space. With the growth in deep learning and its applications in medical imaging, a U-net based architecture is proposed to learn the mapping and estimate a higher resolution image. This work shows …
-
Toward Practical Inverse Scattering
Finally, the nature of superresolution in nonlinear inverse scattering is studied. The prospect of subwavelength resolution at optically large observation distances is investigated. A perfectly conducting tip is used to enhance reconstruction resolution. Thus, two conjectures as to how …
-
STED-4Pi Microscopy
… of a STED-4Pi experiment. Simulations predict a superresolution of about 30 nm that is confirmed in experiments with ultrathin fluorescent layers. These results are so far considered to have the highest axial resolution for a light microscope. First biological images are recorded with membrane …
-
Optimized Microbial Recombinant Production of HIV-1 Anti-Envelope Antibody Fragments with Applications to Single Particle Tracking of Virus Assembly
… with Env in fusion events.</p> <p>Using superresolution microscopy to measure and track host–pathogen interfaces that occur on a scale below the resolution limit of the light microscope is becoming increasingly popular. I have used total internal reflection microscopy (TIRF) and …
-
Structural characterization of primary cilia using accelerated piezoelectrically driven STED nanoscopy
… for dehydration during sample prep. Advent of superresolution optical imaging approaches has only recently made it possible to probe primary cilia morphologically to study its structure in physiologically interesting environments. Signaling pathways regulated by primary cilia are critical to …
-
Computational photography with novel camera sensors
… high dynamic range (HDR) imaging and image superresolution (SR). HDR imaging refers to capturing both bright and dark details in the scenes simultaneously. A modulo camera does not get saturated during exposure, enabling HDR photography in a single shot without losing spatial resolutions. …
-
Theoretical and Experimental Concepts to Increase the Performance of Structured Illumination Microscopy
… illumination microscopy (SIM). SIM is a superresolution technique that excels in gentle live-cell volumetric imaging tasks. Many modalities of SIM were developed over the last decade that tailored SIM into the versatile and powerful technique that it is today. Nevertheless, the field of …
-
3D backscatter localization for fine-grained robotics
… Second, it introduces a Bayesian space-time superresolution algorithm that combines time series of the sensed bandwidth across multiple antennas to enable accurate positioning. Our experiments show that TurboTrack simultaneously achieves a median accuracy of sub-centimeter in each of the …
-
Electromagnetic Time-Reversal Imaging and Tracking Techniques for Inverse Scattering and Wireless Communications
… that in free space, yielding what is known as `superresolution’. Moreover, under ultrawideband (UWB) operation, TR exhibits the distinctive property of `statistical stability’, which makes it an attractive technique for imaging in disordered media whose characteristics are not known …
-
Inverse techniques: problems in optics and gas sensing
… possible ways of beating the diffraction limit: superresolution and evanescent waves. In chapter 5 we investigate the application of inverse techniques to calculating phase patterns which produce superresolution optical traps. We calculate theoreti- cally the improvements to both relative trap …
-
Studies of hyperphosphorylated tau aggregation and cytotoxicity
… to measure the degree of phosphorylation, and superresolution microscopy and electron microscopy to characterize the morphology of aggregates formed. Functionally, compared with the unmodified aggregates, which require heparin induction to assemble, these self-assembled hyperphosphorylated tau …
-
Structure guided image restoration : a deep learning approach
… Furthermore, we extend this method to image superresolution by reformulating the problem as an in-between pixels inpainting task. We propose a two-stage adversarial model that comprises of an edge generator followed by an image completion network. The edge generator hallucinates edges of the …
-
Application of high-throughput methods to reconstruct the evolutionary history of amherstieae by using the fossil pollen record of Striatopollis catatumbus and extant geographical records of the tribe
… especially the legume tribe Amherstieae. First, superresolution confocal microscopy was used to increase the morphological resolution of modern and fossil pollen grains to detect diagnostic features of the pollen structure. This method was selected because it can take images of the internal and …
-
Bayesian super-resolution with application to radar target recognition
… or in conjunction with target recognition. A new superresolution algorithm is developed that is based on numerical Markov chain Monte Carlo Bayesian statistics. This algorithm allows uncertainty in the superresolved image to be taken into account in the target recognition process. It is shown that …
-
A Biophysical Investigation of HIV-1 Envelope Cytoplasmic-Tail Mediated Retention in the Gag Lattice
… single-particle tracking with respect to superresolution reconstructions of the viral bud on living cells in real time. Using this approach and a novel competitive inhibition assay, I also provide evidence that a monomeric Env CT is sufficient for virus particle incorporation and …
-
Advanced parallel magnetic resonance imaging methods with applications to MR spectroscopic imaging
… method for massively parallel MRI systems named Superresolution Sensitivity Encoding (SURE-SENSE) is proposed where acceleration is performed by acquiring the low spatial resolution representation of the object being imaged and the stronger sensitivity variation from small receiver coils is used …
Page 1 of 2