This thesis describes the first attempt at simulating a prototype imaging system involving a biologically inspired imager for the purpose of estimating depth information in ambient scenes. This is part of the series of tests intended for the neuromorphic device developed at the ISS Complex Systems Unit under the HAPTIC project, a feasibility study on the integration of neuromorphic imagers with...

This paper proposes a novel scheme for image focusing by introducing a new focus measure based on self-matching methods. A unique pencil-shaped profile is identified by comparing the similarity between all patterns extracted around the same position in each scene. Based on this profile, a new criterion function called Complementary Pencil Volume (hereafter CPV) is defined to evaluate focused or...

Motion-free superresolution refers to the process of generating a high-resolution image from a set of defocused and downsampled observations blurred to different extents. We first examine the theory of motion-free superresolution and derive analytical expressions in the discrete Fourier transform domain for obtaining a superresolved image from its blurred and downsampled versions. The analysis ...

The centroid of a fluorophore can be determined within approximately 1.5-nm accuracy from its focused image through fluorescence imaging with one-nanometer accuracy (FIONA). If, instead, the sample is moved away from the focus, the point-spread-function depends on both the position and 3D orientation of the fluorophore, which can be calculated by defocused orientation and position imaging (DOPI...

Abstract Norway’s handling of COVID-19 has been seen as a success. Vulnerable groups among young and elderly people, have however, not part this Their interests defocused in two ways. First, they prioritized the big picture, because precautionary principle health concerns, particular capacity questions, dominated. Second, more specific social policy measures indirect targeted vulnerable childre...

The X-ray Integral Field Unit (X-IFU) is the high resolution spectrometer of ESA's Athena observatory. It will deliver data in 0.2-12 keV band with an unprecedented spectral 2.5 eV up to 7 keV. During observation very bright sources, X-IFU detectors receive photon rates. count rate capability be improved by using defocusing option, which enable observations extremely sources fluxes $\simeq 1$ C...

the diffractive multifocal iol provides simultaneous bifocal imaging by utilizing both diffractive and refractive optics. in both distant and near vision, there is a clear highly focused image on the retina. the second image is highly defocused, providing only faint background illumination. a small amount of the light goes to the higher orders of diffraction which are not perceptible by eyes. t...

Microtubules (MTs) are filamentous protein polymers roughly 25 nm in diameter. Ubiquitous in eukaryotes, MTs are well known for their structural role but also act as actuators, sensors, and, in association with other proteins, checkpoint regulators. The thin diameter and transparency of microtubules classifies them as sub-resolution phase objects, with concomitant imaging challenges. Label-free...

In this paper, a parametric sparse representation (PSR) method is proposed for refocusing of moving targets in synthetic aperture radar (SAR) images. In regular SAR images, moving targets are defocused due to unknown motion parameters. Refocusing of moving targets requires accurate phase compensation of echo data. In the proposed method, the region of interest (ROI) data containing the moving t...