Results 21 to 30 of about 909 (114)
Journal of Applied Clinical Medical Physics, Volume 24, Issue 6, June 2023., 2023 Abstract Purpose To apply total generalized variation (TGV) and its combination with low‐rank and sparse decomposition (LRSD) (LTGV) to cerebral perfusion studies using low‐dose dynamic contrast‐enhanced (DCE) CT and to quantitatively evaluate their performances through comparisons with those without any regularizers and those of total variation (TV ...
Kenya Murase +2 more
wiley +1 more source
CubeGAN: Omnidirectional Image Synthesis Using Generative Adversarial Networks
Computer Graphics Forum, Volume 42, Issue 2, Page 213-224, May 2023., 2023 Abstract We propose a framework to create projectively‐correct and seam‐free cube‐map images using generative adversarial learning. Deep generation of cube‐maps that contain the correct projection of the environment onto its faces is not straightforward as has been recognized in prior work.
C. May, D. Aliaga
wiley +1 more source
Tables of the existence of equiangular tight frames
CoRR, 2015 A Grassmannian frame is a collection of unit vectors which are optimally incoherent. To date, the vast majority of explicit Grassmannian frames are equiangular tight frames (ETFs). This paper surveys every known construction of ETFs and tabulates existence for sufficiently small dimensions.
Matthew C. Fickus, Dustin G. Mixon
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Equiangular tight frames and unistochastic matrices [PDF]
Journal of Physics A: Mathematical and Theoretical, 2017 17 pages, 3 figures. Comments are very welcome!
Goyeneche, Dardo, Turek, Ondřej
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Complex equiangular tight frames and erasures
Linear Algebra and its Applications, 2012 12 ...
Hoffman, Thomas R., Solazzo, James P.
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Bipolar Almost Equiangular Tight Frames for NOMA Systems
CoRR, 2022 Non-Orthogonal Multiple Access (NOMA) is a concept which is gaining a big popularity in multiuser networks. It's due to its advantages in sense of total network throughput. It becomes especially significant in large networks such as Internet of Things (IoT) networks or 5G networks. One of the known NOMA techniques is DS-CDMA NOMA, which make use of non-
Lev Gurevich, Ram Zamir
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On the existence of equiangular tight frames
Linear Algebra and its Applications, 2007 The focus of this paper is a geometric object called an equiangular tight frame (ETF). An ETF is a \(d\times U\) matrix that has unit-norm columns and orthogonal rows of norm \(\sqrt{N/d}\). An ETF can be viewed as a set of unit vectors in a Hilbert space with the property that the absolute inner products between pairs of vectors are (i) identical and (
Sustik, Mátyás A. +3 more
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Steiner equiangular tight frames
Linear Algebra and its Applications, 2012 We provide a new method for constructing equiangular tight frames (ETFs). The construction is valid in both the real and complex settings, and shows that many of the few previously-known examples of ETFs are but the first representatives of infinite families of such frames. It provides great freedom in terms of the frame's size and redundancy.
Fickus, Matthew +2 more
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Equiangular tight frames from group divisible designs [PDF]
Designs, Codes and Cryptography, 2018 An equiangular tight frame (ETF) is a type of optimal packing of lines in a real or complex Hilbert space. In the complex case, the existence of an ETF of a given size remains an open problem in many cases. In this paper, we observe that many of the known constructions of ETFs are of one of two types.
Matthew Fickus, John Jasper
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The real equiangular tight frames obtained from rank 3 graphs
Electronic Journal of Graph Theory and ApplicationsWe present all nontrivial real equiangular tight frames {φm}m=1M in RN obtained as spherical embeddings of primitive rank 3 graphs on M vertices, and those such that one of their associated M strongly regular graphs on M - 1 vertices is a primitive rank ...
Eiichi Bannai +4 more
doaj +1 more source