Results 11 to 20 of about 36,471 (278)
Scale-discretised ridgelet transform on the sphere [PDF]
, 2019 We revisit the spherical Radon transform, also called the Funk-Radon transform, viewing it as an axisymmetric convolution on the sphere. Viewing the spherical Radon transform in this manner leads to a straightforward derivation of its spherical harmonic ...
candes +12 more
core +2 more sources
Detection of Blood Vessels in Color Fundus Images using a Local Radon Transform [PDF]
Iranian Journal of Medical Physics, 2010 Introduction: This paper addresses a method for automatic detection of blood vessels in color fundus images which utilizes two main tools: image partitioning and local Radon transform.
Reza Pourreza +3 more
doaj +1 more source
Quantum Radon Transforms and Their Applications
IEEE Transactions on Quantum Engineering, 2022 This article extends the Radon transform, a classical image-processing tool for fast tomography and denoising, to the quantum computing platform. A new kind of periodic discrete Radon transform (PDRT), called the quantum periodic discrete Radon transform
Guangsheng Ma, Hongbo Li, Jiman Zhao
doaj +1 more source
Exact reconstruction formulas for a Radon transform over cones [PDF]
, 2013 Inversion of Radon transforms is the mathematical foundation of many modern tomographic imaging modalities. In this paper we study a conical Radon transform, which is important for computed tomography taking Compton scattering into account.
Haltmeier, Markus
core +1 more source
IET Image Processing, 2021 An extension of Radon transform by using a measure function capturing the user need is proposed. The new transform, called scale space Radon transform, is devoted to the case where the embedded shape in the image is not filiform.
Djemel Ziou +2 more
doaj +1 more source
Applied Sciences, 2023 The Radon transform constitutes the conventional tool for tomosynthesis, i.e., the composition of cross-sections of an object from its projections. It is actually a version of the Fourier Transform, which is accompanied by the appropriate digital high ...
Georgia Koukiou +1 more
doaj +1 more source
A Weak Target Detection Algorithm IAR-STFT Based on Correlated K-distribution Sea Clutter Model [PDF]
Radioengineering, 2023 The detection performance of weak target on sea is affected by the special effects of sea clutter amplitude. Aiming at the time and space correlated of sea clutter, the correlated K-distribution sea clutter model is established by the sphere invariant ...
Y. Liu, X. Rao, X. Zhu, H. Yi, J. Hu
doaj
Mathematical model of non-stationary diffusion – advection of radon in the soil – atmosphere system [PDF]
E3S Web of Conferences, 2023 A one-dimensional mathematical model of non-stationary diffusion - advection of radon in the soil - atmosphere system is considered. Using the integral Laplace transform, an analytical solution of the mathematical model was obtained and, on its basis ...
Parovik Roman
doaj +1 more source
Crosstalk attenuation for imaging of multiples based on angle gather residual moveout analysis
Frontiers in Earth Science, 2023 Imaging of multiples, as a supplement to imaging of primaries, can provide a wider range of subsurface illumination. Therefore, it can provide more detailed information on subsurface structures. However, imaging of multiples suffers from crosstalk issues
Zihao Gao +9 more
doaj +1 more source
A range description for the planar circular Radon transform [PDF]
, 2005 The transform considered in the paper integrates a function supported in the unit disk on the plane over all circles centered at the boundary of this disk.
Ambartsoumian, Gaik, Kuchment, Peter
core +3 more sources