Results 51 to 60 of about 13,906,445 (282)
Image Processing Variations with Analytic Kernels
, 2012 Let $f\in L^1(\R^d)$ be real. The Rudin-Osher-Fatemi model is to minimize $\|u\|_{\dot{BV}}+λ\|f-u\|_{L^2}^2$, in which one thinks of $f$ as a given image, $λ> 0$ as a "tuning parameter", $u$ as an optimal "cartoon" approximation to $f$, and $f-u$ as "noise" or "texture".
Garnett, John B. +2 more
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Efficient Schemes for Total Variation Minimization Under Constraints in Image Processing [PDF]
SIAM Journal on Scientific Computing, 2009 This paper presents new fast algorithms to minimize total variation and more generally l1-norms under a general convex constraint. Such problems are standards of image processing. The algorithms are based on a recent advance in convex optimization proposed by Yurii Nesterov.
Weiss, Pierre +2 more
openaire +3 more sources
An epithelial GPR35 isoform supports tumor‐associated transcriptional and metabolic phenotypes
FEBS Letters, EarlyView.GPR35 generates two functionally distinct isoforms with previously unresolved roles. GPR35‐short mediates immune‐cell chemotaxis, while GPR35‐long is enriched in colorectal cancer epithelium, where it supports increased metabolism, proliferation, and tumor‐associated transcriptional programs.
Jørgen D. Rønneberg +14 more
wiley +1 more source
DISOCCLUSION OF 3D LIDAR POINT CLOUDS USING RANGE IMAGES [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017 This paper proposes a novel framework for the disocclusion of mobile objects in 3D LiDAR scenes aquired via street-based Mobile Mapping Systems (MMS). Most of the existing lines of research tackle this problem directly in the 3D space.
P. Biasutti +4 more
doaj +1 more source
Non-local Functionals Related to the Total Variation and Connections with Image Processing [PDF]
Annals of PDE, 2018 We present new results concerning the approximation of the total variation, $\int_Ω |\nabla u|$, of a function $u$ by non-local, non-convex functionals of the form $$ Λ_δu = \int_Ω \int_Ω \frac{δφ\big( |u(x) - u(y)|/ δ\big)}{|x - y|^{d+1}} \, dx \, dy, $$ as $δ\to 0$, where $Ω$ is a domain in $\mathrm{R}^d$ and $φ: [0, + \infty) \to [0, + \infty)$ is a
Brezis, Haim, Nguyên, Hoài-Minh
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Liver organoids: modelling complexity in homeostasis and disease
FEBS Letters, EarlyView.Studying liver in vitro has been challenging because simple 2D cell cultures fail to capture liver's cellular and architectural complexity. To bridge this gap, scientists increasingly use organoids, 3D liver models which better mimic liver composition and function. This review examines recent advances in liver organoid complexity and realism, discusses
Anna M. Dowbaj, Meritxell Huch
wiley +1 more source
Image processing in echography and MRI
, 2005 This work deals with image processing for three medical imaging applications: speckledetection in 3D ultrasound, left ventricle detection in cardiac magnetic resonance imaging(MRI) and flow feature visualisation in velocity MRI.For speckle detection, a ...
Carmo, Bernardo S., Carmo, Bernardo S
core +1 more source
Advances in Mathematical Physics, 2021 The noise pollution in tourist street view images is caused by various reasons. A major challenge that researchers have been facing is to find a way to effectively remove noise.
Xiaofeng Yang
doaj +1 more source
Epigenetic reprogramming of lineage switching in cancer
FEBS Letters, EarlyView.Cancer cells rarely commit to a single identity. Epigenetic mechanisms and tumor microenvironment cues push epithelial cells toward flexible, hybrid states that can shift into mesenchymal, neuroendocrine, or stem‐like fates, driving metastasis, drug resistance, and tumor heterogeneity. Targeting the epigenetic regulators behind these transitions, using
Ezgi Boyvatlı +4 more
wiley +1 more source
Bayesian 3-D interferometric ISAR imaging for the targets with limited pulses
The Journal of Engineering, 2019 It is difficult to yield high azimuth resolution of a target in short coherent processing interval, which brings certain challenges for the subsequent three-dimensional (3-D) interference inverse synthetic aperture radar (InISAR) imaging.
Xuefei Chen, Yong Wang
doaj +1 more source