Results 11 to 20 of about 3,035 (261)
Nonuniqueness for the Radon transform [PDF]
Proceedings of the American Mathematical Society, 1993 There exists a nonconstant harmonic function h h on
Armitage, D. H., Goldstein, M.
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Inverse Multiscale Discrete Radon Transform by Filtered Backprojection
Applied Sciences, 2020 The Radon transform is a valuable tool in inverse problems such as the ones present in electromagnetic imaging. Up to now the inversion of the multiscale discrete Radon transform has been only possible by iterative numerical methods while the continuous ...
José G. Marichal-Hernández +4 more
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Line Detection Using Radon Transform [PDF]
Engineering and Technology Journal, 2010 To extract features from digital images, it is useful to be able to find simpleshapes (straight lines, circles, ellipses, etc.).In order to achieve this goal, one can be able to detect a group of pixels that are ona straight line or a smooth curve.
H. H. Abbas, Hussein Ali Hussein
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Discrete radon transform [PDF]
IEEE Transactions on Acoustics, Speech, and Signal Processing, 1987 This paper describes the discrete Radon transform (DRT) and the exact inversion algorithm for it. Similar to the discrete Fourier transform (DFT), the DRT is defined for periodic vector-sequences and studied as a transform in its own right. Casting the forward transform as a matrix-vector multiplication, the key observation is that the matrix-although ...
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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
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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
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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
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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
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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
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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
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