نتایج جستجو برای: boundary map

تعداد نتایج: 349178  

Journal: :Pattern Recognition 2022

Accurately assessing the medical image segmentation quality of automatically generated predictions is essential for guaranteeing reliability results computer-assisted diagnosis (CAD). Many researchers have studied estimation without labeled ground truths. Recently, a novel idea proposed, which transforms assessment (SQA) into pixel-wise or voxel-wise error map task. However, simple application ...

2010
Wenju He Olaf Hellwich

We investigate the segmentation of high resolution polarimetric Synthetic Aperture Radar (PolSAR) images of urban areas. The segmentation strategy in [1] is applied in this paper. Spectral graph segmentation has the advantage of capturing non-local property. The probabilistic boundaries and patch features are integrated for spectral graph segmentation. Accurate boundaries extraction and efficie...

2005
Tudor S. Ratiu

This paper shows that the time t map of the averaged Euler equations, with Dirichlet, Neumann, and mixed boundary conditions is canonical relative to a Lie-Poisson bracket constructed via a non-smooth reduction for the corresponding diffeomorphism groups. It is also shown that the geodesic spray for Neumann and mixed boundary conditions is smooth, a result already known for Dirichlet boundary c...

2012
Hideki TSUIKI

It is shown that every unimodal map is realized as a restriction of a simple map defined on the unit disc to a part of its boundary. Our two-dimensional map is called a full-folding map, which is defined generally on a compact metric space. It is a generalization of the full tent map in that it has two homeomorphic inverse maps and thus every non-critical point has two inverse images.

1996
John Albert Horst

We present algorithms that allow an intelligent system to dynamically convert between two representations of spatial occupancy, namely, certainty grids and object boundary curves. These algorithms can be used to accomplish many real-time tasks of a mobile robot such as mapping, navigation, object recognition, and robot localization. For conversion from certainty grid to object boundaries, an ed...

Journal: :iranian journal of numerical analysis and optimization 0
mojtaba moniri jafar s. eivazloo

in an earlier work we showed that for ordered fields f not isomorphic to the reals r, there are continuous 1-1 unctions on [0, 1]f which map some interior point to a boundary point of the image (and so are not open). here we show that over closed bounded intervals in the rationals q as well as in all non-archimedean ordered fields of countable cofinality, there are uniformly continuous 1-1 func...

2001
Elizabeth M. Pierce

An information production map (IP-MAP) is a graphical model designed to help people to comprehend, evaluate, and describe how a data product such as an invoice, customer order, or prescription is assembled. In this paper, an information product control matrix is introduced in conjunction with the IP-Map to help data administrators assess the overall quality of their information products. 1. Inf...

Journal: :SIAM Journal of Applied Mathematics 2004
Nuutti Hyvönen

In electrical impedance tomography one tries to recover the spatial admittance distribution inside a body from boundary measurements. In theoretical considerations it is usually assumed that the boundary data consists of the Neumann-to-Dirichlet map; when conducting realworld measurements, the obtainable data is a linear finite-dimensional operator mapping electrode currents onto electrode pote...

2008
Marc-André Lewis Yvan Saint-Aubin

Langlands recently constructed a map φ → |x(φ)〉 that factorizes the partition function of a free boson on a cylinder with boundary condition given by two arbitrary functions φB1 and φB2 in the form 〈x(φB1)|q00|x(φB2)〉. We rewrite |x(φ)〉 in a compact form, getting rid of technical assumptions necessary in his construction. This simpler form allows us to show explicitly that the map φ → |x(φ)〉 co...

1999
IAN DOBSON

How does a fractal basin boundary arise in the sinusoidally forced Duffing’s equation? We describe how the backwards system flow deforms a local stable manifold into the fractal boundary. Parts of the boundary are labeled in a way related to their time of formation. The truncated fractal boundary produced by a burst of sinusoidal forcing is briefly considered. The approach supplements the insig...

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