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Image Reconstruction: From Sparsity to Data-Adaptive Methods and Machine Learning [PDF]

open access: yesProceedings of the IEEE, 2019
The field of medical image reconstruction has seen roughly four types of methods. The first type tended to be analytical methods, such as filtered backprojection (FBP) for X-ray computed tomography (CT) and the inverse Fourier transform for magnetic ...
S. Ravishankar, J. C. Ye, J. Fessler
semanticscholar   +1 more source

Dynamic Convolutions: Exploiting Spatial Sparsity for Faster Inference [PDF]

open access: yesComputer Vision and Pattern Recognition, 2019
Modern convolutional neural networks apply the same operations on every pixel in an image. However, not all image regions are equally important. To address this inefficiency, we propose a method to dynamically apply convolutions conditioned on the input ...
Thomas Verelst, T. Tuytelaars
semanticscholar   +1 more source

Efficient Weighted-Adaptive Sparse Constrained Nonnegative Tensor Factorization for Hyperspectral Unmixing

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Hyperspectral unmixing aims to separate pure materials and their corresponding proportions that constitute the mixed pixels of hyperspectral imagery (HSI). Recently, the matrix-vector nonnegative tensor factorization (MV-NTF) has attracted wide attention
Ping Yang   +3 more
doaj   +1 more source

Machine Learning Regularization Methods in High-Dimensional Monetary and Financial VARs

open access: yesMathematics, 2022
Vector autoregressions (VARs) and their multiple variants are standard models in economic and financial research due to their power for forecasting, data analysis and inference. These properties are a consequence of their capabilities to include multiple
Javier Sánchez García   +1 more
doaj   +1 more source

Air–Rail Connectivity Index: A Comprehensive Study of Multimodal Journeys

open access: yesEngineering Proceedings
To enhance the accessibility and efficiency of airports, the concept of airport connectivity is extended to High-Speed Rail (HSR), as major hub airports now have direct access to an HSR station.
Clara Buire   +6 more
doaj   +1 more source

A Novel Dictionary-Based Image Reconstruction for Photoacoustic Computed Tomography

open access: yesApplied Sciences, 2018
One of the major concerns in photoacoustic computed tomography (PACT) is obtaining a high-quality image using the minimum number of ultrasound transducers/view angles. This issue is of importance when a cost-effective PACT system is needed.
Parsa Omidi   +6 more
doaj   +1 more source

Non-Linear Regularized Attenuation Compensation for Microwave Breast Imaging

open access: yesIEEE Open Journal of Signal Processing, 2023
We develop non-linear optimization algorithms for attenuation compensation of rapidly time-varying microwave signals in the context of breast imaging.
Nasser Kazemi, Elise Fear
doaj   +1 more source

Sparsity and Infinite Divisibility [PDF]

open access: yesIEEE Transactions on Information Theory, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
A. Amini, M.Unser
openaire   +2 more sources

Twofold Sparsity: Joint Bit- and Network-Level Sparsity for Energy-Efficient Deep Neural Network Using RRAM Based Compute-In-Memory

open access: yesIEEE Access
On-device intelligence and AI-powered edge devices require compressed deep learning algorithm and energy efficient hardware. Compute-in-memory (CIM) architecture is a more suitable candidate than traditional Complementary Metal-Oxide-Semiconductor (CMOS)
Foroozan Karimzadeh, Arijit Raychowdhury
doaj   +1 more source

Robust feature selection method via joint low-rank reconstruction and projection reconstruction

open access: yesTongxin xuebao, 2023
Aiming at the problem that current feature selection methods were still affected by noise and cannot effectively unify clustering and reconstruction effects, a robust feature selection method was proposed.A robust reconstruction error term was built by ...
Shuangyan YI   +5 more
doaj  

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