نتایج جستجو برای: three dimensional numerical models

تعداد نتایج: 2527223  

Journal: :Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention 2005
Marcos Martín-Fernández Sylvain Bouix Lida Ungar Robert W. McCarley Martha Elizabeth Shenton

In this paper, we present an evaluation of seven automatic brain tissue classifiers based on level of agreements. A number of agreement measures are explained, and we show how they can be used to compare different segmentation techniques. We use the Simultaneous Truth and Performance Level Estimation (STAPLE) of Warfield et al. but also introduce a novel evaluation technique based on the Willia...

Journal: :Geoscientific Model Development 2023

Abstract. Atmospheric fronts are a widely used conceptual model in meteorology, most encountered as two-dimensional (2-D) front lines on surface analysis charts. The three-dimensional (3-D) dynamical structure of has been studied the literature by means “standard” 2-D maps and cross-sections is commonly sketched 3-D illustrations idealized weather systems atmospheric science textbooks. However,...

2011
Hiroki Matsuzaki Kunitoshi Motoki

Numerical simulations of acoustic characteristics of vocal-tract model are performed with three-dimensional radiation and wall loss. A method to calculate transfer characteristics suitable for three-dimensional vocal-tract models is proposed. And the simulation results show that the simulation under the lossless condition potentially causes unrealistic result, and wall loss is needed for the th...

2016
Ming-Jie Sun Matthew P. Edgar Graham M. Gibson Baoqing Sun Neal Radwell Robert Lamb Miles J. Padgett

Time-of-flight three-dimensional imaging is an important tool for applications such as object recognition and remote sensing. Conventional time-of-flight three-dimensional imaging systems frequently use a raster scanned laser to measure the range of each pixel in the scene sequentially. Here we show a modified time-of-flight three-dimensional imaging system, which can use compressed sensing tec...

Journal: :American heart journal 1982
A H Tilley G L Stiles

R ecently there’s been a push among some of our clients to start bringing 3d imaging systems in-house. In the majority of cases the client wants my company to provide some form of training to help them get off on the right foot. Although we are in the consulting business, training is a different animal. We’ve worked for years, continuously refining our processes and tools, investing in R&D and ...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2014
Lu Gao Xiao-long Liu Zhiyuan Zheng Kaige Wang

Lensless ghost imaging (LGI) with thermal light requires an equal length between the test and reference arms. When this condition is not met, the image becomes blurred. Here we propose an experimental scheme of LGI where the lengths of the two arms are not equal. Our experiment shows that when a glass rod is inserted into a longer arm, the clear image can be formed in the intensity correlation ...

Journal: :Physical review letters 2001
P Korecki G Materlik J Korecki

A new technique for high fidelity three-dimensional imaging of atomic structure with gamma-ray holography is demonstrated. A complex hologram was constructed from holograms recorded for different values of the nuclear scattering amplitude on both sides of the (57)Fe Mössbauer resonance. The holographic reconstruction was applied to this complex hologram resulting in a twin-image-free image of t...

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