Results 71 to 80 of about 609 (157)

Pseudo-polar Reconstruction for Tomography

open access: yes, 2017
We propose a stable and fast reconstruction technique for parallelbeam (PB) tomographic X-Ray imaging, relying on the discrete pseudo-polar (PP) Radon and PP Fourier transforms.
Shahar Tsiper and Yonina C. Eldar
core   +1 more source

Discrete Radon

open access: yes, 2008
transform has an exact, fast inverse and generalizes to operations other than sums along ...
William H. Press
core  

The finite ridgelet transform for image representation

open access: yes
The ridgelet transform (Candès and Donoho, 1999) was introduced as a sparse expansion for functions on continuous spaces that are smooth away from discontinuities along lines.
Do, Minh N., Vetterli, Martin
core   +1 more source

Efficient FPGA implementation and power modelling of image and signal processing IP cores

open access: yes, 2007
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Field Programmable Gate Arrays (FPGAs) are the technology of choice in a number ofimage and signal processing application areas such as consumer ...
Chandrasekaran, Shrutisagar
core  

On Applications of Unequally Spaced Fast Fourier Transforms

open access: yes, 1998
Introduction The Fast Fourier Transform (FFT) algorithm of Cooley and Tukey [7] requires sampling on an equally spaced grid which is a significant limitation in many applications.
Beylk In
core  

Radon-Guided Wavelet-Domain Attention U-Net for Periodic Artifact Suppression in Brain MRI. [PDF]

open access: yesJ Imaging
Rios-Perez JD   +4 more
europepmc   +1 more source

Parabolic Radon transform and x-squared fk-transform - aliasing and efficiency

open access: yes, 1997
this paper the aliasing is studied by comparing the PRT with the Nonuniform Discrete Fourier Transform (NDFT). Although we find the same main principals, there are some differences.
M.A. Schonewille, A.J.W. Duijndam
core  

Time-series analysis: how to apply and interpret the Fast Fourier Transform

open access: yes
Many natural hazards have cyclic/periodic behaviour, e.g. radon, earthquakes (under some circumstances), annual/seasonal droughts and floods, whereas others are anomalous, apparently random with regard to time, e.g.
Crockett, Robin G M
core   +1 more source

Home - About - Disclaimer - Privacy