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pro vyhledávání: '"Prasad, Sudhakar"'
For the 3D localization problem using point spread function (PSF) engineering, we propose a novel enhancement of our previously introduced localization neural network, LocNet. The improved network is a physics-informed neural network (PINN) that we c
Externí odkaz:
http://arxiv.org/abs/2410.13295
Autor:
Prasad, Sudhakar
We calculate the quantum Fisher information (QFI) for estimating, using a circular imaging aperture, the two-dimensional location of a point source against a uniformly bright disk of known center and radius in the ideal photon-counting limit. We pres
Externí odkaz:
http://arxiv.org/abs/2211.16395
Autor:
Prasad, Sudhakar
Publikováno v:
Phys. Rev. A 102, 063719 (2020)
We calculate the quantum Fisher information (QFI) for estimating, using a circular imaging aperture, the length of a uniformly bright incoherent line source with a fixed mid-point and the radius of a uniformly bright incoherent disk shaped source wit
Externí odkaz:
http://arxiv.org/abs/2008.09946
Publikováno v:
International Workshop On Image Processing and Inverse Problems (2020)
We consider three-dimensional (3D) localization and imaging of space debris from only one two-dimensional (2D) snapshot image. The technique involves an optical imager that exploits off-center image rotation to encode both the lateral and depth coord
Externí odkaz:
http://arxiv.org/abs/2006.02858
Autor:
Prasad, Sudhakar
Publikováno v:
Phys. Rev. A 102, 033726 (2020)
Optically localizing a single quasi-monochromatic source to sub-diffractive precisions entails, in the photon-counting limit, a minimum photon cost that scales as the squared ratio of the width, $w$, of the optical system's point-spread function (PSF
Externí odkaz:
http://arxiv.org/abs/2006.00982
Autor:
Prasad, Sudhakar
This paper extends our previous quantum Fisher information (QFI) based analysis of the problem of separating a pair of equal-brightness incoherent point sources in three dimensions to the case of a pair of sources that are unequally bright. When the
Externí odkaz:
http://arxiv.org/abs/1908.10949
We consider the problem of joint three-dimensional (3D) localization and material classification of unresolved space debris using a multispectral rotating point spread function (RPSF). The use of RPSF allows one to estimate the 3D locations of point
Externí odkaz:
http://arxiv.org/abs/1906.04749
Publikováno v:
Proc. 2018 AMOS Technical Conference
An optical imager that exploits off-center image rotation to encode both the lateral and depth coordinates of point sources in a single snapshot can perform 3D localization and tracking of space debris. When actively illuminated, unresolved space deb
Externí odkaz:
http://arxiv.org/abs/1809.10541
Autor:
Prasad, Sudhakar, Yu, Zhixian
Publikováno v:
Phys. Rev. A 99, 022116 (2019)
A recent paper [Z. Yu and S. Prasad, "Quantum limited superresolution of an incoherent source pair in three dimensions," arXiv:1805.09227v2 [quant-ph] (2018)] considered the problem of quantum limited estimation of the separation vector for a pair of
Externí odkaz:
http://arxiv.org/abs/1807.09853
Autor:
Yu, Zhixian, Prasad, Sudhakar
Publikováno v:
Phys. Rev. Lett. 121, 180504 (2018)
The error in estimating the separation of a pair of incoherent sources from radiation emitted by them and subsequently captured by an imager is fundamentally bounded below by the inverse of the corresponding quantum Fisher information (QFI) matrix. W
Externí odkaz:
http://arxiv.org/abs/1805.09227