Results 11 to 20 of about 22,663 (297)

Iterative Cosparse Projection Algorithms For The Recovery Of Cosparse Vectors [PDF]

open access: yes, 2011
Publication in the conference proceedings of EUSIPCO, Barcelona, Spain ...
Giryes, Raja   +3 more
openaire   +5 more sources

An Effective CUDA Parallelization of Projection in Iterative Tomography Reconstruction.

open access: yesPLoS ONE, 2015
Projection and back-projection are the most computationally intensive parts in Computed Tomography (CT) reconstruction, and are essential to acceleration of CT reconstruction algorithms.
Lizhe Xie   +9 more
doaj   +2 more sources

A unified evaluation of iterative projection algorithms for phase retrieval [PDF]

open access: yes, 2006
Iterative projection algorithms are successfully being used as a substitute of lenses to recombine, numerically rather than optically, light scattered by illuminated objects. Images obtained computationally allow aberration-free diffraction-limited imaging and the possibility of using radiation for which no lenses exist.
S. Marchesini, Marchesini, S
openaire   +3 more sources

Recursive/Iterative unique Projection-Aggregation of RM codes [PDF]

open access: yes, 2022
We describe recursive unique projection-aggregation (RUPA) decoding and iterative unique projection-aggregation (IUPA) decoding of Reed-Muller (RM) codes, which remove non-unique projections from the recursive projection-aggregation (RPA) and iterative ...
Goossens, Kees   +5 more
core   +1 more source

Projections for Approximate Policy Iteration Algorithms [PDF]

open access: yes, 2019
Approximate policy iteration is a class of reinforcement learning (RL) algorithms where the policy is encoded using a function approximator and which has been especially prominent in RL with continuous action spaces. In this class of RL algorithms, ensuring increase of the policy return during policy update often requires to constrain the change in ...
Akrour, R.   +3 more
openaire   +4 more sources

Coordinate descent iterations in fast affine projection algorithm [PDF]

open access: yesIEEE Signal Processing Letters, 2005
We propose a new approach for real-time implementation of the fast affine projection (FAP) algorithm. This is based on exploiting the recently introduced dichotomous coordinate descent (DCD) algorithm, which is especially efficient for solving systems of linear equations on real-time hardware and software platforms since it is free of multiplication ...
Yuriy V. Zakharov, Felix Albu
openaire   +2 more sources

A Novel Iterative CT Reconstruction Approach Based on FBP Algorithm. [PDF]

open access: yesPLoS ONE, 2015
The Filtered Back-Projection (FBP) algorithm and its modified versions are the most important techniques for CT (Computerized tomography) reconstruction, however, it may produce aliasing degradation in the reconstructed images due to projection ...
Hongli Shi   +3 more
doaj   +1 more source

Suppression of Cone-Beam Artefacts with Direct Iterative Reconstruction Computed Tomography Trajectories (DIRECTT)

open access: yesJournal of Imaging, 2021
The reconstruction of cone-beam computed tomography data using filtered back-projection algorithms unavoidably results in severe artefacts. We describe how the Direct Iterative Reconstruction of Computed Tomography Trajectories (DIRECTT) algorithm can be
Sotirios Magkos   +2 more
doaj   +1 more source

New construction and proof techniques of projection algorithm for countable maximal monotone mappings and weakly relatively non-expansive mappings in a Banach space

open access: yesJournal of Inequalities and Applications, 2018
In a real uniformly convex and uniformly smooth Banach space, some new monotone projection iterative algorithms for countable maximal monotone mappings and countable weakly relatively non-expansive mappings are presented.
Li Wei, Ravi P. Agarwal
doaj   +1 more source

Relaxed Projection Methods with Self-Adaptive Step Size for Solving Variational Inequality and Fixed Point Problems for an Infinite Family of Multivalued Relatively Nonexpansive Mappings in Banach Spaces

open access: yesMathematical and Computational Applications, 2020
In each iteration, the projection methods require computing at least one projection onto the closed convex set. However, projections onto a general closed convex set are not easily executed, a fact that might affect the efficiency and applicability of ...
Safeer Hussain Khan   +2 more
doaj   +1 more source

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