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   Articles with "foreground" as a keyword



Efficient foreground object segmentation from video by Probability Weighted Moments

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recommendations! Published in 2021 at "Optik"

DOI: 10.1016/j.ijleo.2020.166251

Abstract: Abstract Segmentation of foreground objects is an important issue in computer vision. Since, there exist no predefined classes for unsupervised learning, which makes it computationally expensive. Also, the contrast of foreground to background needs to… read more here.

Keywords: object segmentation; foreground; segmentation; probability weighted ... See more keywords

Weakly supervised chest X-ray abnormality localization with non-linear modulation and foreground control

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recommendations! Published in 2024 at "Scientific Reports"

DOI: 10.1038/s41598-024-79701-8

Abstract: Chest X-ray is widely used to diagnose lung diseases. Due to the demand for accelerating analysis and interpretation to reduce the workload of radiologists, there has been a growing interest in building automated systems of… read more here.

Keywords: foreground; abnormality localization; ray abnormality; chest ray ... See more keywords
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Improved large-scale interstellar dust foreground model and CMB solar dipole measurement

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recommendations! Published in 2021 at "Astronomy and Astrophysics"

DOI: 10.1051/0004-6361/202140616

Abstract: February 22, 2021 ABSTRACT The Cosmic Microwave Background anisotropies are difficult to measure at large angular scales. In this paper, we present a new analysis of the Planck High Frequency Instrument data that brings the… read more here.

Keywords: large scale; foreground; solar dipole; signal ... See more keywords
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Gaussian Process Regression for foreground removal in HI intensity mapping experiments

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recommendations! Published in 2021 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stab2594

Abstract: We apply for the first time Gaussian Process Regression (GPR) as a foreground removal technique in the context of single-dish, low redshift H i intensity mapping, and present an open-source python toolkit for doing so. We… read more here.

Keywords: frequency; foreground; intensity mapping; foreground removal ... See more keywords

21-cm foregrounds and polarization leakage: cleaning and mitigation strategies

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recommendations! Published in 2021 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stab856

Abstract: The success of H i intensity mapping is largely dependent on how well 21-cm foreground contamination can be controlled. In order to progress our understanding further, we present a range of simulated foreground data from two… read more here.

Keywords: polarization leakage; component analysis; leakage; foregrounds polarization ... See more keywords

Sky-averaged 21-cm signal extraction using multiple antennas with an SVD framework: the REACH case

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recommendations! Published in 2022 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stad1047

Abstract: In a sky-averaged 21-cm signal experiment, the uncertainty on the extracted signal depends mainly on the covariance between the foreground and 21-cm signal models. In this paper, we construct these models using the modes of… read more here.

Keywords: averaged signal; foreground; signal extraction; foreground model ... See more keywords

Extracting the Global 21cm signal from Cosmic Dawn and Epoch of Reionization in the presence of Foreground and Ionosphere

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recommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stae078

Abstract: Detection of redshifted H i 21cm emission is a potential probe for investigating the Universe’s first billion years. However, given the significantly brighter foreground, detecting 21cm is observationally difficult. The Earth’s ionosphere considerably distorts the signal… read more here.

Keywords: foreground; ann model; global 21cm; 21cm signal ... See more keywords

Detailed study of the ELAIS N1 field with the uGMRT - I. Characterizing the 325 MHz foreground for redshifted 21 cm observations

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recommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stz1580

Abstract: In this first paper of the series, we present initial results of newly upgraded Giant Meterwave Radio Telescope (uGMRT) observation of European Large-Area ISO Survey-North 1 (ELAIS-N1) at 325 MHz with 32 MHz bandwidth. Precise… read more here.

Keywords: 325 mhz; mhz; mathcal ell; foreground ... See more keywords

The Simons Observatory: Combining cross-spectral foreground cleaning with multitracer B -mode delensing for improved constraints on inflation

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recommendations! Published in 2024 at "Physical Review D"

DOI: 10.1103/physrevd.110.043532

Abstract: The Simons Observatory (SO), due to start full science operations in early 2025, aims to set tight constraints on inflationary physics by inferring the tensor-to-scalar ratio r from measurements of cosmic microwave background (CMB) polarization… read more here.

Keywords: foreground; foreground cleaning; mode; simons observatory ... See more keywords

Forecasting the performance of the minimally Informed foreground cleaning method for CMB polarization observations

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recommendations! Published in 2025 at "Physical Review D"

DOI: 10.1103/xqbc-pjv3

Abstract: Astrophysical foreground substraction is crucial to retrieve the cosmic microwave background (CMB) polarization out of the observed data. Recent efforts have been carried out towards the development of a minimally informed component separation method to… read more here.

Keywords: foreground; method; cmb polarization; minimally informed ... See more keywords

A Content-Aware Image Retargeting Quality Assessment Method Using Foreground and Global Measurement

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recommendations! Published in 2019 at "IEEE Access"

DOI: 10.1109/access.2019.2927032

Abstract: Image retargeting methods aim to minimize the perceptual loss while changing sizes and aspect ratios of images. Since optimal retargeting methods for different images are generally not the same, the image retargeting quality assessment (IRQA)… read more here.

Keywords: retargeting quality; image retargeting; global measurement; foreground ... See more keywords