Results 1 to 10 of about 25,809 (167)
Projection Matrix Based Iterative Reconstruction Algorithm for Robotic CT
IEEE Access, 2023 Robotic computed tomography (CT) consists of two separate manipulators which carry the source and detector, respectively. Various errors occur in motion due to lack of rigid connection, which may change scanning trajectory of this system.
Xuan Zhou, Qiong Xu, Cunfeng Wei
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Sensors, 2023 In this paper, we consider a slot-controlled coded compressed sensing protocol for unsourced massive random access (URA) that concatenates a shared patterned Reed–Muller (PRM) inner codebook to an outer error-correction code.
Wenjiao Xie, Runhe Tian, Huisheng Zhang
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Iterative algorithms with seminorm‐induced oblique projections [PDF]
Abstract and Applied Analysis, 2003 A definition of oblique projections onto closed convex sets that use seminorms induced by diagonal matrices which may have zeros on the diagonal is introduced. Existence and uniqueness of such projections are secured via directional affinity of the sets with respect to the diagonal matrices involved. A block‐iterative algorithmic scheme for solving the
Censor, Yair, Elfving, Tommy
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Block-Iterative Algorithms with Underrelaxed Bregman Projections [PDF]
SIAM Journal on Optimization, 2002 The authors consider the convex feasibility problem of finding a point of the set \(C=\bigcap_{i=1}^{m} C_{i}\) where each \(C_{i}\) is a convex closed subset of \(R^{n}\). The usual block-iterative algorithms for this problem are based on the sequential orthogonal projections with possible relaxations.
Censor, Yair, Herman, Gabor T.
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Statistical Interior Tomography via L1 Norm Dictionary Learning without Assuming an Object Support
Tomography, 2022 Interior tomography of X-ray computed tomography (CT) has many advantages, such as a lower radiation dose and lower detector hardware cost compared to traditional CT.
Junfeng Wu, Xiaofeng Wang, Xuanqin Mou
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Step Surface Profile Measurement Based on Fringe Projection Phase-Shifting Using Selective Sampling
Photonics, 2021 Fringe projection is a non-contact optical method that is widely used in the optical precision measurement of complex stepped surfaces. However, the accuracy of the fringe phase extraction employed has a direct impact on the measurement precision of the ...
Songsong Zhang, Haisong Huang
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Coordinate descent iterations in fast affine projection algorithm [PDF]
IEEE 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 ...
Zakharov, Y, Albu, F
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Projection Classification Based Iterative Algorithm
IOP Conference Series: Materials Science and Engineering, 2015 Iterative algorithm has good performance as it does not need complete projection data in 3D image reconstruction area. It is possible to be applied in BGA based solder joints inspection but with low convergence speed which usually acts with x-ray Laminography that has a worse reconstruction image compared to the former one. This paper explores to apply
Ruiqiu Zhang, Chen Li, Wenhua Gao
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A Hybrid Gradient-Projection Algorithm for Averaged Mappings in Hilbert Spaces
Journal of Applied Mathematics, 2012 It is well known that the gradient-projection algorithm (GPA) is very useful in solving constrained convex minimization problems. In this paper, we combine a general iterative method with the gradient-projection algorithm to propose a hybrid gradient ...
Ming Tian, Min-Min Li
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A Novel Iterative CT Reconstruction Approach Based on FBP Algorithm. [PDF]
PLoS 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
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