Results 261 to 270 of about 167,710 (314)
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Curve Parametrization by Moments
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2009We present a method for deriving a parametric description of a conic section (quadratic curve) in an image from the moments of the image with respect to several specially-constructed kernel functions. In contrast to Hough-transform-type methods, the moment approach requires no large accumulator array.
Irina Popovici, William Douglas Withers
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On a Dyadic Parametrization of Curves
Computational Methods and Function Theory, 2004Let \(C\) be a curve in the complex plane where \(C = \{a(t): 0 \leq t \leq 1\},\) where \(a(0) \neq a(1)\). The authors discuss a dyadic paramerization for \(C\) first introduced by the first two authors [Michigan Math. J. 41, 269-284 (1994; Zbl 0815.30010)]. Let \(z(0) = a(0)\) and \(z(1) = a(1)\) and let \(C_{1,1}\) denote the directed segment from \
Anderson, J. Milne +2 more
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Structural Safety, 2019 International audienceSeismic fragility curves give the probability of exceedance of the threshold of a damage state of a structure, or a non-structural component, conditioned on the intensity measure of the seismic motion.
Konstantinos Trevlopoulos +2 more
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Proceedings of the 3rd international conference on Computer graphics and interactive techniques in Australasia and South East Asia, 2005
In this paper, we propose a method for creating parametric curves on triangular meshes. A curve on a mesh is frequently used as a boundary curve of a specific region of a mesh in mesh modeling and applications such as texture mapping, remeshing or morphing.
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In this paper, we propose a method for creating parametric curves on triangular meshes. A curve on a mesh is frequently used as a boundary curve of a specific region of a mesh in mesh modeling and applications such as texture mapping, remeshing or morphing.
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Computer Aided Geometric Design, 1984
A degenerate parametric polynomial curve is defined as one that (a) does not have a one-to-one correspondence between points of the curve and points in the domain or (b) has a common factor in the numerator and denominator (for rational curves). Methods are developed to detect and remove such situations, i.e. by a suitable reparametrization.
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A degenerate parametric polynomial curve is defined as one that (a) does not have a one-to-one correspondence between points of the curve and points in the domain or (b) has a common factor in the numerator and denominator (for rational curves). Methods are developed to detect and remove such situations, i.e. by a suitable reparametrization.
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Algebraically rectifiable parametric curves
Computer Aided Geometric Design, 1993A differentiable parametric curve \((x(t),y(t))\) is said to be a polynomial parametric one, if \(x(t)\), \(y(t)\) both are polynomials. In this paper sufficient and necessary conditions for the arc length \(s(t) = \int^ t_ 0 \sqrt{x'{}^ 2(\tau) + y'{}^ 2(\tau)} d\tau\) of a polynomial parametric curve to be an algebraic function of the parameter are ...
Takis Sakkalis, Rida T. Farouki
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On the Parametrization of an Algebraic Curve
Mathematical Notes, 2019Given an algebraic plane curve, the existence of a global uniformization is guaranteed by the Uniformization Theorem, but there is no an algorithm for its calculation. Currently, it is very well known how to parametrize the curve if its genus is equal to \(0\) or \(1\) or if its group of birational authomorphisms is sufficiently large. The main goal of
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Parametric and nonparametric curve fitting
Automatica, 2006This article summarizes the convergence issues for the classical curve fitting problem. The properties of the input signal that ensure convergence of the estimate are investigated. In the parametric case, the standard least squares method is used and the sufficient conditions under which the estimated parameters converge to their true values almost ...
K. HSU +4 more
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Fitting parametric disk curves
International Journal of Computer Mathematics, 1999Methods for fitting parametric disk curves to a set of disks are developed.
Lin, Q, Rokne, JG
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Prescribing the length of parametric curves
Computer Aided Geometric Design, 1996zbMATH Open Web Interface contents unavailable due to conflicting licenses.
John A. Roulier, Bruce R. Piper
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