Results 31 to 40 of about 2,310,096 (349)

A Full-Spectrum Registration Method for Zhuhai-1 Satellite Hyperspectral Imagery

open access: yesSensors, 2020
Accurate registration is an essential prerequisite for analysis and applications involving remote sensing imagery. It is usually difficult to extract enough matching points for inter-band registration in hyperspectral imagery due to the different ...
Jinjun Meng   +6 more
doaj   +1 more source

Optimal affine image normalization approach for optical character recognition [PDF]

open access: yesКомпьютерная 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

Scale Transformations in Metric-Affine Geometry

open access: yesUniverse, 2019
This article presents an exhaustive classification of metric-affine theories according to their scale symmetries. First it is clarified that there are three relevant definitions of a scale transformation.
Damianos Iosifidis, Tomi Koivisto
doaj   +1 more source

The Maxwell Lagrangian in purely affine gravity [PDF]

open access: yes, 2008
The purely affine Lagrangian for linear electrodynamics, that has the form of the Maxwell Lagrangian in which the metric tensor is replaced by the symmetrized Ricci tensor and the electromagnetic field tensor by the tensor of homothetic curvature, is ...
Eddington A. S.   +10 more
core   +1 more source

Affine Anosov Diffeomorphims of Affine Manifolds

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2008
We show that a compact affine manifold endowed with an affine Anosov transformation is finitely covered by a complete affine nilmanifold. This is a partial answer of a conjecture of Franks for affine manifolds.
Aristide Tsemo
doaj   +1 more source

Extreme affine transformations [PDF]

open access: yesCommunications in Mathematical Physics, 1976
We classify the extreme points of the compact convex set of affine maps of IR n which map into itself the closed unit ball. This work is a preliminary step towards solving the problem of finding the extreme points of the compact convex set of affine maps of theN×N density matrices (dynamical maps of anN-level system) and forn=3 furnishes the solution ...
Gorini, Vittorio, Sudarshan, E. C. G.
openaire   +3 more sources

2D Cadastral Coordinate Transformation using extreme learning machine technique [PDF]

open access: yesGeodesy and Cartography, 2018
Land surveyors, photogrammetrists, remote sensing engineers and professionals in the Earth sciences are often faced with the task of transferring coordinates from one geodetic datum into another to serve their desired purpose.
Yao Yevenyo Ziggah   +3 more
doaj   +1 more source

Guaranteed Minimum-Rank Solutions of Linear Matrix Equations via Nuclear Norm Minimization [PDF]

open access: yes, 2007
The affine rank minimization problem consists of finding a matrix of minimum rank that satisfies a given system of linear equality constraints. Such problems have appeared in the literature of a diverse set of fields including system identification and ...
Benjamin Recht   +4 more
core   +3 more sources

Distributed Adaptive Affine Formation Control for Heterogeneous Linear Networked Systems

open access: yesIEEE Access, 2019
This paper addresses the distributed adaptive affine formation protocol design problem for the heterogeneous leader-follower-type linear networked systems, in which the interaction graph is directed.
Yang Xu   +3 more
doaj   +1 more source

Genetic Algorithm-based Affine Parameter Estimation for Shape Recognition

open access: yesInternational Journal of Advanced Robotic Systems, 2014
Shape recognition is a classically difficult problem because of the affine transformation between two shapes. The current study proposes an affine parameter estimation method for shape recognition based on a genetic algorithm (GA).
Yuxing Mao   +3 more
doaj   +1 more source

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