Results 41 to 50 of about 2,193,626 (355)
Optimal affine image normalization approach for optical character recognition [PDF]
Компьютерная оптика, 2021 Optical character recognition (OCR) in images captured from arbitrary angles requires preliminary normalization, i.e. a geometric transformation resulting in an image as if it was captured at an angle suitable for OCR. In most cases, a surface containing
I.A. Konovalenko +2 more
doaj +1 more source
The Schwartzman group of an affine transformation
Journal of Spectral Theory, 2023 We compute the Schwartzman group associated with an ergodic affine automorphism of a compact connected abelian group given by the composition of an automorphism of the group and a translation by an element in the path component of the identity. We show that the Schwartzman group can be characterized by evaluating the invariant characters of the ...
David Damanik +2 more
openaire +2 more sources
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein +7 more
wiley +1 more source
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Background and purpose For postoperative breast cancer patients, deformable image registration (DIR) is challenged due to the large deformations and non‐correspondence caused by tumor resection and clip insertion. To deal with it, three metrics (fiducial‐, region‐, and intensity‐based) were jointly used in DIR algorithm for improved accuracy ...
Xin Xie +6 more
wiley +1 more source
Acceleration of Affine Hybrid Transformations [PDF]
, 2014 This work addresses the computation of the set of reachable configurations of linear hybrid automata. The approach relies on sym-bolic state-space exploration, using acceleration in order to speed up the computation and to make it terminate for a broad class of systems.
Boigelot, Bernard +2 more
openaire +3 more sources
ODE/IM correspondence and supersymmetric affine Toda field equations
Nuclear Physics B, 2022 We study the linear differential system associated with the supersymmetric affine Toda field equations for affine Lie superalgebras, which has a purely odd simple root system.
Katsushi Ito, Mingshuo Zhu
doaj
The decomposition and classification of radiant affine 3-manifolds [PDF]
Memoirs of Amer. Math. Soc. (2001) Vol. 730 pp. 1-122 (2001), 1997 An affine manifold is a manifold with torsion-free flat affine connection. A geometric topologist's definition of an affine manifold is a manifold with an atlas of charts to the affine space with affine transition functions; a radiant affine manifold is an affine manifold with holonomy consisting of affine transformations fixing a common fixed point ...
arxiv +1 more source
A Concise Parametrization of Affine Transformation
SIAM Journal on Imaging Sciences, 2016 errors corrected, a section on Frechet mean ...
Hiroyuki Ochiai, Shizuo Kaji
openaire +2 more sources
The Persistence Landscapes of Affine Fractals [PDF]
arXiv, 2022 We develop a method for calculating the persistence landscapes of affine fractals using the parameters of the corresponding transformations. Given an iterated function system of affine transformations that satisfies a certain compatibility condition, we prove that there exists an affine transformation acting on the space of persistence landscapes which
arxiv
Extreme Learning Machine With Affine Transformation Inputs in an Activation Function
IEEE Transactions on Neural Networks and Learning Systems, 2019 The extreme learning machine (ELM) has attracted much attention over the past decade due to its fast learning speed and convincing generalization performance.
Jiuwen Cao +5 more
semanticscholar +1 more source