نتایج جستجو برای: uniformity correction

تعداد نتایج: 179312  

2005
H. M. Kwok B. Filippone B. Plaster

The search for electric dipole moment (EDM) using ultra cold neutrons (UCNs) may discover new Physics beyond the Standard Model (SM) of electroweak interaction, where the presence of EDM, which would signal T violation and thus CP violation (by assuming CPT invariance), may explain the asymmetry of particle-antiparticle observed in our universe. In the measurement of EDM, a small, uniform and f...

2008
Wenming GUO Lihong LIANG

It has become an inevitable development that X-ray digital imaging detectors replace film-screen. The imaging quality of X-ray digital detector could not reach the level of film-screen due to its unique characteristics. It is the key that to research the method of improving and optimizing the digital imaging quality. The main factors to impact X-ray digital imaging quality is inherent non-unifo...

2017
Javier Gutiérrez García Jesús Rodríguez-López Salvador Romaguera

The original definition of a topological space given by Hausdorff used neighborhood systems. Lattice-valued maps appear in this context when you identify a topology with a monoid in the Kleisli category of the filter monad on SET. H?hle’s notion of a lattice-valued topology [2] uses the same idea and it’s inspired in the classical lattice-valued topologies. Ltopological spaces are motivated by ...

Journal: :Medical image analysis 2006
Boubakeur Belaroussi Julien Milles Sabin Carme Yue Min Zhu Hugues Benoit-Cattin

Magnetic resonance imaging is a popular and powerful non-invasive imaging technique. Automated analysis has become mandatory to efficiently cope with the large amount of data generated using this modality. However, several artifacts, such as intensity non-uniformity, can degrade the quality of acquired data. Intensity non-uniformity consists in anatomically irrelevant intensity variation throug...

2008
W. Zheng M. W. Chee V. Zagorodnov

Introduction. Intensity non-uniformity can have detrimental effect on the accuracy of automated measurements of brain structures and can often be corrected only retrospectively. Among existing correction approaches, the nonparametric non-uniformity intensity normalization method N3 (1) is one of the most frequently used. However, at least one recent study (2) suggested that its performance on 3...

2012
Masami Goto Osamu Abe Tosiaki Miyati Hiroyuki Kabasawa Hidemasa Takao Naoto Hayashi Tomomi Kurosu Takeshi Iwatsubo Fumio Yamashita Hiroshi Matsuda Harushi Mori Akira Kunimatsu Shigeki Aoki Kenji Ino Keiichi Yano Kuni Ohtomo

OBJECTIVE Many studies have reported pre-processing effects for brain volumetry; however, no study has investigated whether non-parametric non-uniform intensity normalization (N3) correction processing results in reduced system dependency when using an atlas-based method. To address this shortcoming, the present study assessed whether N3 correction processing provides reduced system dependency ...

2000
A. Irwin J. Oleson Richard Robinson

The advent of high resolution infrared resistor arrays, has greatly increased the level of fidelity of infrared sensor testing that can be accomplished in the cost effective laboratory environment. However, the sensor output image quality depends on the uniformity of the projector array. In addition to the advanced proprietary design and fabrication process used to create a highly uniform emitt...

Journal: :Remote Sensing 2023

Non-uniformity in the response of spectral image elements is an inevitable phenomenon hyperspectral imaging, which mainly manifests itself as presence band noise acquired data. This problem prominent infrared owing to detector material, operating environment, and other factors. important factor that can affect quality data, has a serious impact on both data analysis applications requires correc...

2015
Charles D. Hill Eldad Peretz Samuel J. Hile Matthew G. House Martin Fuechsle Sven Rogge Michelle Y. Simmons Lloyd C. L. Hollenberg

The exceptionally long quantum coherence times of phosphorus donor nuclear spin qubits in silicon, coupled with the proven scalability of silicon-based nano-electronics, make them attractive candidates for large-scale quantum computing. However, the high threshold of topological quantum error correction can only be captured in a two-dimensional array of qubits operating synchronously and in par...

2017
K D Joshi T E Marchant C J Moore

A shading correction algorithm for the improvement of cone-beam CT (CBCT) images (Phys. Med. Biol. 53 5719–33) has been further developed, optimised and validated extensively using 135 clinical CBCT images of patients undergoing radiotherapy treatment of the pelvis, lungs and head & neck. An automated technique has been developed to efficiently analyse the large number of clinical images. Small...

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