Results 141 to 150 of about 7,028,550 (415)
Acta Polytechnica, 2009 This paper presents properties of chosen multichannel algorithms for speech enhancement in a noisy environment. These methods are suitable for hands-free communication in a car cabin. Criteria for evaluation of these systems are also presented.
V. Bolom
doaj
1/f Noise Reduction using In-Pixel Chopping in CMOS Image Sensor [PDF]
arXiv, 2018 In this paper, an in-pixel chopping technique to reduce the low-frequency or 1/f noise of the source follower (SF) transistor in an active pixel sensor (APS) is presented. The SF low-frequency noise is modulated at higher frequencies through chopping, implemented inside the pixel, and in later stage eliminated using low-pass filtering. To implement the
arxiv
Lightweight Online Noise Reduction on Embedded Devices using Hierarchical Recurrent Neural Networks [PDF]
arXiv, 2020 Deep-learning based noise reduction algorithms have proven their success especially for non-stationary noises, which makes it desirable to also use them for embedded devices like hearing aids (HAs). This, however, is currently not possible with state-of-the-art methods.
arxiv
Optics Express, 2015 Optical coherence tomography (OCT) is an important imaging technique extensively applied in medical sciences. However, OCT images often suffer from speckle noise, which is a kind of multiplicative noise inherited in coherent imaging systems.
G. Gong, Hongming Zhang, M. Yao
semanticscholar +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose This study evaluates the technical feasibility of adapting a surface monitoring system, designed for conventional four‐dimensional computed tomography (4DCT), to an intelligent, breathing‐adapted 4DCT and examines its potential to expand the currently limited range of supported surrogate systems.
Niklas Lackner +4 more
wiley +1 more source
Spectral Subtractive Type Speech Enhancement Methods
Advances in Electrical and Electronic Engineering, 2010 In this paper spectral subtractive method and some of its modification are compared. Performance of spectral subtraction, its limitations, artifacts introduced by it, and spectral subtraction modifications for eliminating these artifacts are discussed in
Ekaterina Verteletskaya, Boris Simak
doaj
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose This study evaluates a novel cone‐beam computed tomography (CBCT) imaging solution integrated onto a conventional C‐arm linear accelerator (linac) with increased gantry speed. The purpose is to assess the impact of improved imaging hardware and reconstruction algorithms on image quality.
Theodore Arsenault +9 more
wiley +1 more source
Poisson noise reduction with non-local PCA
, 2013 Photon-limited imaging arises when the number of photons collected by a sensor array is small relative to the number of detector elements. Photon limitations are an important concern for many applications such as spectral imaging, night vision, nuclear ...
Deledalle, Charles-Alban +3 more
core +3 more sources
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Background This study aims to develop a novel predictive model for determining human papillomavirus (HPV) presence in oropharyngeal cancer using computed tomography (CT). Current image‐based HPV prediction methods are hindered by high computational demands or suboptimal performance.
Junhua Chen +3 more
wiley +1 more source
Noise Reduction in LED-Based Photoacoustic Imaging
PhotonicsPhotoacoustic tomography (PAT), also known as optoacoustic tomography, has been emerging as a biomedical imaging modality that can provide cross-sectional or three-dimensional (3D) visualization of biological tissues such as blood vessels and lymphatic ...
Takahiro Kono +5 more
doaj +1 more source