نتایج جستجو برای: standard ellipse

تعداد نتایج: 519492  

Journal: :Graphical Models and Image Processing 1999

Journal: :Image and Vision Computing 1992

Journal: :Communications in Mathematical Physics 2019

2009
Matt Kraning Arezou Keshavarz Lei Zhao

We develop an algorithm called bubble clustering which attempts to cover a given set of points with the union of k ellipses of minimum total volume. This algorithm operates by splitting and merging ellipses according to an annealing schedule and does not assume any prior distribution on the data. We compare our algorithm with k-means and the EM algorithm for mixture of Gaussians. Numerical resu...

Journal: :Circulation 1970
R L Popp D C Harrison

The ventricular dimensions of 51 patients with heart disease were determined by ultrasonic echography during cardiac catheterization. These data were used to calculate end-diastolic and end-systolic volumes and stroke volume, using a prolate ellipse as a geometric model of the left ventricle. In 30 patients without valvular regurgitation the stroke volumes determined by the echographic method w...

2008
CÉSAR CASTILHO HÉLIO MACHADO

We consider the N-vortex problem on a ellipsoid of revolution. Applying standard techniques of classical perturbation theory we construct a sequence of conformal transformations from the ellipsoid into the complex plane. Using these transformations the equations of motion for the N-vortex problem on the ellipsoid are written as a formal series on the eccentricity of the ellipsoid’s generating e...

2004
Sergio Escalera Petia Radeva

Mobile Mapping is a standard technique for compiling cartographic information from a mobile vehicle. This paper proposes a novel method for modelling the recognition in a Mobile Mapping process that consists in fitting a model to recover the sign distortion and applying recognition techniques on weak classifiers cascade results. The images received from Adaboost learning algorithm with weak cla...

Journal: :Czechoslovak Mathematical Journal 2005

Journal: :The Journal of Geometric Analysis 2020

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